/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/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:53:48,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:53:48,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:53:48,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:53:48,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:53:48,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:53:48,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:53:48,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:53:48,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:53:48,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:53:48,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:53:48,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:53:48,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:53:48,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:53:48,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:53:48,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:53:48,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 05:53:48,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:53:48,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:53:48,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:53:48,385 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 05:53:48,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:53:48,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:53:48,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:53:48,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:53:48,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:53:48,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:53:48,408 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:53:48,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:53:48,408 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:53:48,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:53:48,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:53:48,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:53:48,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:53:48,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:53:48,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:53:48,409 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:53:48,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:53:48,410 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:53:48,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:53:48,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:53:48,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:53:48,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:53:48,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:53:48,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:53:48,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:53:48,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:53:48,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:53:48,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:53:48,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:53:48,411 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:53:48,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:53:48,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:53:48,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:53:48,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:53:48,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:53:48,665 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:53:48,666 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:53:48,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2021-06-05 05:53:48,666 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-06-05 05:53:48,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:53:48,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:53:48,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:53:48,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:53:48,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:53:48,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:53:48,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:53:48,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:53:48,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:53:48,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/1) ... [2021-06-05 05:53:48,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:53:48,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:53:48,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:53:48,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:53:48,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (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 05:53:48,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:53:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:53:48,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:53:48,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:53:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:53:48,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:53:48,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:53:48,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:53:48,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:53:48,765 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 05:53:48,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:53:48,879 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 05:53:48,880 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 05:53:48,880 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 05:53:48,881 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:53:48 BoogieIcfgContainer [2021-06-05 05:53:48,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:53:48,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:53:48,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:53:48,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:53:48,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:53:48" (1/2) ... [2021-06-05 05:53:48,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496512b1 and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:53:48, skipping insertion in model container [2021-06-05 05:53:48,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:53:48" (2/2) ... [2021-06-05 05:53:48,885 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-06-05 05:53:48,889 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:53:48,889 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:53:48,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:53:48,889 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:53:48,908 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:53:48,922 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:53:48,944 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:53:48,944 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:53:48,944 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:53:48,944 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:53:48,944 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:53:48,944 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:53:48,945 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:53:48,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:53:48,950 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 05:53:48,962 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 05:53:48,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:48,974 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:48,976 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash -262068682, now seen corresponding path program 1 times [2021-06-05 05:53:49,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:49,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261786822] [2021-06-05 05:53:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:49,080 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 05:53:49,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:49,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261786822] [2021-06-05 05:53:49,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261786822] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:53:49,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:53:49,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:53:49,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416552808] [2021-06-05 05:53:49,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:53:49,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:49,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:53:49,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:53:49,094 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:49,111 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-06-05 05:53:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:53:49,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 05:53:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:49,117 INFO L225 Difference]: With dead ends: 20 [2021-06-05 05:53:49,117 INFO L226 Difference]: Without dead ends: 16 [2021-06-05 05:53:49,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:53:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-05 05:53:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-05 05:53:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 05:53:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-06-05 05:53:49,139 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-06-05 05:53:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:49,139 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-06-05 05:53:49,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-06-05 05:53:49,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 05:53:49,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:49,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:49,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:53:49,141 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:49,147 INFO L82 PathProgramCache]: Analyzing trace with hash 488876151, now seen corresponding path program 1 times [2021-06-05 05:53:49,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:49,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563499928] [2021-06-05 05:53:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:49,174 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 05:53:49,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:49,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563499928] [2021-06-05 05:53:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563499928] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:53:49,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:53:49,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:53:49,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70971808] [2021-06-05 05:53:49,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:53:49,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:49,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:53:49,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:53:49,177 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:49,181 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-06-05 05:53:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:53:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 05:53:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:49,182 INFO L225 Difference]: With dead ends: 21 [2021-06-05 05:53:49,182 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 05:53:49,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:53:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 05:53:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 05:53:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-06-05 05:53:49,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-06-05 05:53:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:49,185 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-06-05 05:53:49,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-06-05 05:53:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 05:53:49,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:49,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:49,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:53:49,186 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:49,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:49,187 INFO L82 PathProgramCache]: Analyzing trace with hash 426152002, now seen corresponding path program 1 times [2021-06-05 05:53:49,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:49,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910438135] [2021-06-05 05:53:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:49,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:49,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910438135] [2021-06-05 05:53:49,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910438135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:49,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714314839] [2021-06-05 05:53:49,216 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 05:53:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:49,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:53:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:49,315 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 05:53:49,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:49,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:49,323 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 05:53:49,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:53:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:49,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714314839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:49,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:49,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:53:49,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786612266] [2021-06-05 05:53:49,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:53:49,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:53:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:53:49,345 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:49,380 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-06-05 05:53:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:53:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 05:53:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:49,382 INFO L225 Difference]: With dead ends: 25 [2021-06-05 05:53:49,382 INFO L226 Difference]: Without dead ends: 21 [2021-06-05 05:53:49,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:53:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-06-05 05:53:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-06-05 05:53:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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 05:53:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-06-05 05:53:49,391 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-06-05 05:53:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:49,391 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-06-05 05:53:49,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-06-05 05:53:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 05:53:49,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:49,391 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:49,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 05:53:49,607 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:49,608 INFO L82 PathProgramCache]: Analyzing trace with hash 348880875, now seen corresponding path program 2 times [2021-06-05 05:53:49,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:49,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037997890] [2021-06-05 05:53:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:49,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:49,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037997890] [2021-06-05 05:53:49,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037997890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:49,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664731720] [2021-06-05 05:53:49,669 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 05:53:49,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:49,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:49,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:53:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:49,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664731720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:49,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:49,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-05 05:53:49,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292805136] [2021-06-05 05:53:49,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:53:49,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:53:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:53:49,759 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:49,775 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-06-05 05:53:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:53:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 05:53:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:49,778 INFO L225 Difference]: With dead ends: 50 [2021-06-05 05:53:49,778 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 05:53:49,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:53:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 05:53:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-06-05 05:53:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 05:53:49,785 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 05:53:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:49,786 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 05:53:49,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 05:53:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 05:53:49,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:49,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:49,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:49,997 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash 200515830, now seen corresponding path program 3 times [2021-06-05 05:53:49,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:49,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14778722] [2021-06-05 05:53:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:50,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:50,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14778722] [2021-06-05 05:53:50,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14778722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:50,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330407967] [2021-06-05 05:53:50,060 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 05:53:50,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:53:50,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:53:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:50,166 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 05:53:50,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:50,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:50,171 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 05:53:50,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:53:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:50,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330407967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:50,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:50,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 05:53:50,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592945700] [2021-06-05 05:53:50,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:53:50,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:50,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:53:50,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:53:50,183 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:50,241 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-06-05 05:53:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:53:50,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 05:53:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:50,242 INFO L225 Difference]: With dead ends: 65 [2021-06-05 05:53:50,242 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 05:53:50,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:53:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 05:53:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-06-05 05:53:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 05:53:50,254 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-06-05 05:53:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:50,254 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 05:53:50,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 05:53:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 05:53:50,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:50,255 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:50,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:50,469 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:50,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:50,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1944094135, now seen corresponding path program 4 times [2021-06-05 05:53:50,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:50,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025742640] [2021-06-05 05:53:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:50,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:50,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025742640] [2021-06-05 05:53:50,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025742640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:50,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180964521] [2021-06-05 05:53:50,500 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 05:53:50,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:50,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:50,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:53:50,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:50,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180964521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:50,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:50,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:53:50,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632105219] [2021-06-05 05:53:50,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:53:50,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:50,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:53:50,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:53:50,588 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:50,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:50,600 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-06-05 05:53:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:53:50,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 05:53:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:50,603 INFO L225 Difference]: With dead ends: 73 [2021-06-05 05:53:50,603 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 05:53:50,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:53:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 05:53:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-06-05 05:53:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-06-05 05:53:50,612 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-06-05 05:53:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:50,612 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-06-05 05:53:50,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-06-05 05:53:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:53:50,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:50,613 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:50,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:50,831 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1099206658, now seen corresponding path program 5 times [2021-06-05 05:53:50,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:50,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077051585] [2021-06-05 05:53:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:50,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077051585] [2021-06-05 05:53:50,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077051585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571112407] [2021-06-05 05:53:50,891 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 05:53:50,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:53:50,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:50,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:53:50,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:51,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:51,096 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:53:51,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:51,103 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 05:53:51,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 05:53:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:51,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571112407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:51,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:51,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 05:53:51,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079565708] [2021-06-05 05:53:51,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:53:51,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:51,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:53:51,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:53:51,110 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:51,399 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-06-05 05:53:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:53:51,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 05:53:51,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:51,401 INFO L225 Difference]: With dead ends: 229 [2021-06-05 05:53:51,401 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 05:53:51,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:53:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 05:53:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-06-05 05:53:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-06-05 05:53:51,409 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-06-05 05:53:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:51,409 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-06-05 05:53:51,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-06-05 05:53:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:53:51,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:51,409 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:51,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 05:53:51,623 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:51,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:51,624 INFO L82 PathProgramCache]: Analyzing trace with hash -449307722, now seen corresponding path program 6 times [2021-06-05 05:53:51,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:51,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062371569] [2021-06-05 05:53:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:51,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062371569] [2021-06-05 05:53:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062371569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:51,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771166685] [2021-06-05 05:53:51,734 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 05:53:51,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:53:51,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:53:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:51,817 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 05:53:51,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:51,820 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 05:53:51,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:53:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:51,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771166685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:51,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:51,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 05:53:51,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23009430] [2021-06-05 05:53:51,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:53:51,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:51,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:53:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:53:51,827 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:51,969 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-06-05 05:53:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:53:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:53:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:51,970 INFO L225 Difference]: With dead ends: 121 [2021-06-05 05:53:51,970 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 05:53:51,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:53:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 05:53:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-06-05 05:53:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-06-05 05:53:51,972 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-06-05 05:53:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:51,972 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-06-05 05:53:51,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-06-05 05:53:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:53:51,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:51,972 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:52,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:52,177 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1020566793, now seen corresponding path program 7 times [2021-06-05 05:53:52,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:52,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680579419] [2021-06-05 05:53:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:52,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:52,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680579419] [2021-06-05 05:53:52,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680579419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:52,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328555667] [2021-06-05 05:53:52,221 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 05:53:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:52,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:53:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:52,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328555667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:52,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:52,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 05:53:52,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763241407] [2021-06-05 05:53:52,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:53:52,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:53:52,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:53:52,279 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:52,292 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-06-05 05:53:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:53:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:53:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:52,293 INFO L225 Difference]: With dead ends: 128 [2021-06-05 05:53:52,293 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 05:53:52,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:53:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 05:53:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-05 05:53:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-06-05 05:53:52,296 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-06-05 05:53:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:52,296 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-06-05 05:53:52,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-06-05 05:53:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:53:52,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:52,297 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:52,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:52,513 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1344581694, now seen corresponding path program 8 times [2021-06-05 05:53:52,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:52,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935296184] [2021-06-05 05:53:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:52,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:52,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935296184] [2021-06-05 05:53:52,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935296184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:52,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559422081] [2021-06-05 05:53:52,616 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 05:53:52,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:52,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:52,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:53:52,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:52,709 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 05:53:52,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:52,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:52,712 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 05:53:52,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:53:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:52,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559422081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:52,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:52,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 05:53:52,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557805677] [2021-06-05 05:53:52,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:53:52,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:52,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:53:52,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:53:52,720 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:52,908 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-06-05 05:53:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:53:52,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:53:52,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:52,909 INFO L225 Difference]: With dead ends: 179 [2021-06-05 05:53:52,909 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 05:53:52,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:53:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 05:53:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-06-05 05:53:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 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 05:53:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-05 05:53:52,917 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-06-05 05:53:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:52,917 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-05 05:53:52,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-05 05:53:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:53:52,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:52,919 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:53,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:53:53,125 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1290711147, now seen corresponding path program 9 times [2021-06-05 05:53:53,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:53,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671435393] [2021-06-05 05:53:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:53,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:53,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671435393] [2021-06-05 05:53:53,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671435393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:53,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13707896] [2021-06-05 05:53:53,182 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 05:53:53,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:53:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:53:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:53,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13707896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:53,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:53,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 05:53:53,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425780608] [2021-06-05 05:53:53,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:53:53,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:53:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:53:53,265 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:53,286 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-06-05 05:53:53,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:53:53,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:53:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:53,287 INFO L225 Difference]: With dead ends: 160 [2021-06-05 05:53:53,288 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 05:53:53,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:53:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 05:53:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-05 05:53:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-05 05:53:53,291 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-06-05 05:53:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:53,291 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-05 05:53:53,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-05 05:53:53,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:53:53,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:53,292 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:53,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:53,497 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash -849963402, now seen corresponding path program 10 times [2021-06-05 05:53:53,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:53,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236210494] [2021-06-05 05:53:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:53,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:53,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236210494] [2021-06-05 05:53:53,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236210494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:53,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256446045] [2021-06-05 05:53:53,628 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 05:53:53,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:53,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:53:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:53,726 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 05:53:53,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:53,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:53:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:53,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256446045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:53,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:53,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 05:53:53,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697344786] [2021-06-05 05:53:53,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:53:53,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:53:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:53:53,736 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:54,000 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-06-05 05:53:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:53:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:53:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:54,001 INFO L225 Difference]: With dead ends: 229 [2021-06-05 05:53:54,001 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 05:53:54,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:53:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 05:53:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-06-05 05:53:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 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 05:53:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-06-05 05:53:54,003 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-06-05 05:53:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:54,003 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-06-05 05:53:54,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-06-05 05:53:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:53:54,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:54,004 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:54,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:54,221 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:54,221 INFO L82 PathProgramCache]: Analyzing trace with hash -555990985, now seen corresponding path program 11 times [2021-06-05 05:53:54,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:54,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257445239] [2021-06-05 05:53:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:54,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257445239] [2021-06-05 05:53:54,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257445239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154707957] [2021-06-05 05:53:54,277 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 05:53:54,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:53:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:53:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:54,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154707957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:54,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:54,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 05:53:54,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438391632] [2021-06-05 05:53:54,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:53:54,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:54,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:53:54,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:53:54,354 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:54,371 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-06-05 05:53:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:53:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:53:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:54,371 INFO L225 Difference]: With dead ends: 195 [2021-06-05 05:53:54,372 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 05:53:54,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:53:54,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 05:53:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-06-05 05:53:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-06-05 05:53:54,374 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-06-05 05:53:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:54,374 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-06-05 05:53:54,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-06-05 05:53:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:53:54,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:54,375 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:54,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 05:53:54,586 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash -454897790, now seen corresponding path program 12 times [2021-06-05 05:53:54,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:54,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606563226] [2021-06-05 05:53:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:54,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:54,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606563226] [2021-06-05 05:53:54,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606563226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:54,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020638781] [2021-06-05 05:53:54,743 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 05:53:54,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:53:54,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:54,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:53:54,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:55,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:55,228 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:53:55,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:55,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:55,235 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 05:53:55,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 05:53:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:55,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020638781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:55,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:55,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 05:53:55,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197049132] [2021-06-05 05:53:55,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:53:55,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:55,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:53:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:53:55,242 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:56,731 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-06-05 05:53:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:53:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:53:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:56,733 INFO L225 Difference]: With dead ends: 869 [2021-06-05 05:53:56,733 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 05:53:56,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1611.4ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:53:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 05:53:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-06-05 05:53:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-06-05 05:53:56,744 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-06-05 05:53:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:56,744 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-06-05 05:53:56,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-06-05 05:53:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:53:56,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:56,746 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:56,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:53:56,962 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1467420982, now seen corresponding path program 13 times [2021-06-05 05:53:56,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:56,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102996365] [2021-06-05 05:53:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:57,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:57,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102996365] [2021-06-05 05:53:57,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102996365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:57,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252396690] [2021-06-05 05:53:57,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:53:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:57,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:53:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:57,255 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 05:53:57,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:57,258 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 05:53:57,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:53:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:57,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252396690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:57,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:57,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 05:53:57,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97090564] [2021-06-05 05:53:57,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:53:57,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:53:57,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:53:57,264 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:57,658 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-06-05 05:53:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:53:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:53:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:57,659 INFO L225 Difference]: With dead ends: 325 [2021-06-05 05:53:57,659 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 05:53:57,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:53:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 05:53:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-06-05 05:53:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-06-05 05:53:57,661 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-06-05 05:53:57,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:57,661 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-06-05 05:53:57,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:57,661 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-06-05 05:53:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:53:57,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:57,662 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:57,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:53:57,877 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1731519113, now seen corresponding path program 14 times [2021-06-05 05:53:57,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:57,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562524554] [2021-06-05 05:53:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:57,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:57,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562524554] [2021-06-05 05:53:57,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562524554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:57,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362260777] [2021-06-05 05:53:57,947 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 05:53:57,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:57,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:53:57,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:58,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362260777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:58,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:58,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 05:53:58,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449091349] [2021-06-05 05:53:58,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:53:58,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:58,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:53:58,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:53:58,032 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:58,052 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-06-05 05:53:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:53:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:53:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:58,053 INFO L225 Difference]: With dead ends: 274 [2021-06-05 05:53:58,053 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 05:53:58,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:53:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 05:53:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-05 05:53:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-06-05 05:53:58,057 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-06-05 05:53:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:58,057 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-06-05 05:53:58,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-06-05 05:53:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:53:58,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:58,058 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:58,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:58,269 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash 252907330, now seen corresponding path program 15 times [2021-06-05 05:53:58,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:58,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131065326] [2021-06-05 05:53:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:58,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:58,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131065326] [2021-06-05 05:53:58,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131065326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:58,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767659665] [2021-06-05 05:53:58,476 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 05:53:58,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:53:58,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:58,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 05:53:58,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:58,560 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 05:53:58,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:58,563 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 05:53:58,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:53:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:58,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767659665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:58,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:58,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-05 05:53:58,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993907753] [2021-06-05 05:53:58,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:53:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:58,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:53:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:53:58,569 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 05:53:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:59,024 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-06-05 05:53:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:53:59,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 05:53:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:59,025 INFO L225 Difference]: With dead ends: 415 [2021-06-05 05:53:59,025 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 05:53:59,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 502.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 05:53:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-06-05 05:53:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-05 05:53:59,027 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-06-05 05:53:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:59,027 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-05 05:53:59,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 05:53:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-05 05:53:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:53:59,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:59,028 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:59,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:53:59,241 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:59,241 INFO L82 PathProgramCache]: Analyzing trace with hash -726736661, now seen corresponding path program 16 times [2021-06-05 05:53:59,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:59,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810829656] [2021-06-05 05:53:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:59,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:59,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810829656] [2021-06-05 05:53:59,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810829656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:59,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145229471] [2021-06-05 05:53:59,321 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 05:53:59,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:53:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:59,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145229471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:59,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:59,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 05:53:59,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828685042] [2021-06-05 05:53:59,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:53:59,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:59,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:53:59,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:53:59,407 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 05:53:59,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:59,430 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-06-05 05:53:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:53:59,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 28 [2021-06-05 05:53:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:59,431 INFO L225 Difference]: With dead ends: 318 [2021-06-05 05:53:59,431 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 05:53:59,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:53:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 05:53:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-06-05 05:53:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-06-05 05:53:59,435 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-06-05 05:53:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:59,435 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-06-05 05:53:59,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 05:53:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-06-05 05:53:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:53:59,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:59,436 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:59,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:53:59,641 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash -658404362, now seen corresponding path program 17 times [2021-06-05 05:53:59,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:59,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518690389] [2021-06-05 05:53:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:59,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518690389] [2021-06-05 05:53:59,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518690389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18755229] [2021-06-05 05:53:59,896 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 05:53:59,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:53:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 05:53:59,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:00,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:00,636 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:54:00,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:00,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:00,642 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 05:54:00,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 05:54:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:00,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18755229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:00,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:00,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:54:00,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147454777] [2021-06-05 05:54:00,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:54:00,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:54:00,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:54:00,649 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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 05:54:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:04,084 INFO L93 Difference]: Finished difference Result 1727 states and 3354 transitions. [2021-06-05 05:54:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:54:04,085 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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 29 [2021-06-05 05:54:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:04,087 INFO L225 Difference]: With dead ends: 1727 [2021-06-05 05:54:04,087 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 05:54:04,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 3562.0ms TimeCoverageRelationStatistics Valid=2986, Invalid=13526, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 05:54:04,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 05:54:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 252. [2021-06-05 05:54:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.095617529880478) internal successors, (526), 251 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 526 transitions. [2021-06-05 05:54:04,097 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 526 transitions. Word has length 29 [2021-06-05 05:54:04,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:04,097 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 526 transitions. [2021-06-05 05:54:04,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 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 05:54:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 526 transitions. [2021-06-05 05:54:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:54:04,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:04,098 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:04,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:04,309 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:04,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1964765438, now seen corresponding path program 18 times [2021-06-05 05:54:04,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:04,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886381220] [2021-06-05 05:54:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:04,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886381220] [2021-06-05 05:54:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886381220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287758821] [2021-06-05 05:54:04,608 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 05:54:04,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:54:04,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:04,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 05:54:04,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:04,715 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 05:54:04,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:04,718 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 05:54:04,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:54:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:04,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287758821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:04,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:04,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 05:54:04,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843064689] [2021-06-05 05:54:04,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:54:04,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:54:04,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:54:04,724 INFO L87 Difference]: Start difference. First operand 252 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 05:54:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:05,377 INFO L93 Difference]: Finished difference Result 541 states and 1052 transitions. [2021-06-05 05:54:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:54:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 05:54:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:05,379 INFO L225 Difference]: With dead ends: 541 [2021-06-05 05:54:05,379 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 05:54:05,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 736.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:54:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 05:54:05,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 71. [2021-06-05 05:54:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2021-06-05 05:54:05,381 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2021-06-05 05:54:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:05,381 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2021-06-05 05:54:05,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 05:54:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2021-06-05 05:54:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:05,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:05,382 INFO L521 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:05,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:05,597 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash -755115733, now seen corresponding path program 19 times [2021-06-05 05:54:05,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:05,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892678228] [2021-06-05 05:54:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:05,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:05,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892678228] [2021-06-05 05:54:05,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892678228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:05,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900950318] [2021-06-05 05:54:05,700 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 05:54:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:54:05,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:05,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900950318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:05,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:05,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 05:54:05,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982130473] [2021-06-05 05:54:05,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:54:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:54:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:54:05,825 INFO L87 Difference]: Start difference. First operand 71 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:05,852 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2021-06-05 05:54:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:54:05,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:54:05,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:05,853 INFO L225 Difference]: With dead ends: 415 [2021-06-05 05:54:05,853 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 05:54:05,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:54:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 05:54:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2021-06-05 05:54:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.088328075709779) internal successors, (662), 317 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2021-06-05 05:54:05,860 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2021-06-05 05:54:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:05,860 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2021-06-05 05:54:05,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2021-06-05 05:54:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:54:05,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:05,860 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:06,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:06,069 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:06,069 INFO L82 PathProgramCache]: Analyzing trace with hash -396491082, now seen corresponding path program 20 times [2021-06-05 05:54:06,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:06,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440418304] [2021-06-05 05:54:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:06,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:06,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440418304] [2021-06-05 05:54:06,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440418304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734841934] [2021-06-05 05:54:06,394 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 05:54:06,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:54:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:06,491 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 05:54:06,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:06,493 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 05:54:06,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:54:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:06,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734841934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:06,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 05:54:06,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428326042] [2021-06-05 05:54:06,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:54:06,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:54:06,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:54:06,499 INFO L87 Difference]: Start difference. First operand 318 states and 662 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:07,290 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2021-06-05 05:54:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:54:07,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:54:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:07,291 INFO L225 Difference]: With dead ends: 655 [2021-06-05 05:54:07,291 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 05:54:07,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 843.2ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:54:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 05:54:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2021-06-05 05:54:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 75 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2021-06-05 05:54:07,295 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2021-06-05 05:54:07,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:07,295 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2021-06-05 05:54:07,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2021-06-05 05:54:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:54:07,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:07,295 INFO L521 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:07,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:54:07,501 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash 616749047, now seen corresponding path program 21 times [2021-06-05 05:54:07,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:07,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901634857] [2021-06-05 05:54:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:07,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:07,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901634857] [2021-06-05 05:54:07,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901634857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:07,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019013688] [2021-06-05 05:54:07,613 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 05:54:07,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:54:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 05:54:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:07,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019013688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:07,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:07,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 05:54:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459028155] [2021-06-05 05:54:07,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:54:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:54:07,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:54:07,711 INFO L87 Difference]: Start difference. First operand 76 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:07,741 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2021-06-05 05:54:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:54:07,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:54:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:07,742 INFO L225 Difference]: With dead ends: 468 [2021-06-05 05:54:07,743 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 05:54:07,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:54:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 05:54:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2021-06-05 05:54:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.085635359116022) internal successors, (755), 362 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2021-06-05 05:54:07,748 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2021-06-05 05:54:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:07,748 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2021-06-05 05:54:07,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2021-06-05 05:54:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:54:07,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:07,749 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:07,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:54:07,961 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:07,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1657654978, now seen corresponding path program 22 times [2021-06-05 05:54:07,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:07,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117327160] [2021-06-05 05:54:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:08,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:08,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117327160] [2021-06-05 05:54:08,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117327160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:08,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589706684] [2021-06-05 05:54:08,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:54:08,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:08,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:08,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 05:54:08,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:08,440 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 05:54:08,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:08,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:08,442 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 05:54:08,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:54:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589706684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:08,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:08,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-05 05:54:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452511227] [2021-06-05 05:54:08,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:54:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:54:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:54:08,448 INFO L87 Difference]: Start difference. First operand 363 states and 755 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:09,360 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2021-06-05 05:54:09,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:54:09,360 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:54:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:09,361 INFO L225 Difference]: With dead ends: 747 [2021-06-05 05:54:09,361 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 05:54:09,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 998.0ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:54:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 05:54:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2021-06-05 05:54:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.95) internal successors, (156), 80 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2021-06-05 05:54:09,365 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2021-06-05 05:54:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:09,365 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2021-06-05 05:54:09,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2021-06-05 05:54:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:54:09,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:09,365 INFO L521 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:09,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:09,566 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash -129232533, now seen corresponding path program 23 times [2021-06-05 05:54:09,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:09,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177798069] [2021-06-05 05:54:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:09,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177798069] [2021-06-05 05:54:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177798069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44846137] [2021-06-05 05:54:09,675 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 05:54:09,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:54:09,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:09,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:54:09,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:09,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44846137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:09,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:09,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 05:54:09,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769308501] [2021-06-05 05:54:09,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:54:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:54:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:54:09,790 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:09,820 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2021-06-05 05:54:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:54:09,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:54:09,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:09,821 INFO L225 Difference]: With dead ends: 524 [2021-06-05 05:54:09,821 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 05:54:09,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:54:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 05:54:09,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2021-06-05 05:54:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0829268292682928) internal successors, (854), 410 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2021-06-05 05:54:09,832 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2021-06-05 05:54:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:09,832 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2021-06-05 05:54:09,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2021-06-05 05:54:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:54:09,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:09,834 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:10,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:54:10,049 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:10,050 INFO L82 PathProgramCache]: Analyzing trace with hash -546012810, now seen corresponding path program 24 times [2021-06-05 05:54:10,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:10,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988774231] [2021-06-05 05:54:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:10,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:10,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988774231] [2021-06-05 05:54:10,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988774231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:10,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121484912] [2021-06-05 05:54:10,500 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 05:54:10,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:54:10,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:54:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:10,615 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 05:54:10,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:10,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:10,617 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 05:54:10,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:54:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:10,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121484912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:10,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:10,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 05:54:10,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196177626] [2021-06-05 05:54:10,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:54:10,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:54:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:54:10,623 INFO L87 Difference]: Start difference. First operand 411 states and 854 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:11,702 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2021-06-05 05:54:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:54:11,703 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:54:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:11,704 INFO L225 Difference]: With dead ends: 845 [2021-06-05 05:54:11,704 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 05:54:11,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1185.7ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:54:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 05:54:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2021-06-05 05:54:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-06-05 05:54:11,707 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-06-05 05:54:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:11,708 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-06-05 05:54:11,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-06-05 05:54:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:54:11,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:11,708 INFO L521 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:11,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:11,921 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash 276542775, now seen corresponding path program 25 times [2021-06-05 05:54:11,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:11,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221555338] [2021-06-05 05:54:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:12,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:12,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221555338] [2021-06-05 05:54:12,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221555338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:12,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896827379] [2021-06-05 05:54:12,063 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 05:54:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:12,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896827379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:12,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:12,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 05:54:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187917052] [2021-06-05 05:54:12,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:54:12,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:54:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:54:12,172 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:12,206 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-06-05 05:54:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:54:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 05:54:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:12,208 INFO L225 Difference]: With dead ends: 583 [2021-06-05 05:54:12,208 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 05:54:12,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:54:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 05:54:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-06-05 05:54:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-06-05 05:54:12,215 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-06-05 05:54:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:12,215 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-06-05 05:54:12,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-06-05 05:54:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:54:12,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:12,216 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:12,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:54:12,429 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:12,429 INFO L82 PathProgramCache]: Analyzing trace with hash -817344894, now seen corresponding path program 26 times [2021-06-05 05:54:12,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:12,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924982654] [2021-06-05 05:54:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:12,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924982654] [2021-06-05 05:54:12,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924982654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:12,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562217982] [2021-06-05 05:54:12,902 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 05:54:12,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:12,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:12,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:54:12,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:13,015 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 05:54:13,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:13,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:13,019 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 05:54:13,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:54:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:13,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562217982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:13,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:13,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 05:54:13,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310368039] [2021-06-05 05:54:13,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:54:13,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:54:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:54:13,025 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:14,242 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-06-05 05:54:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:54:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:54:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:14,244 INFO L225 Difference]: With dead ends: 949 [2021-06-05 05:54:14,244 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 05:54:14,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1321.2ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:54:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 05:54:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-06-05 05:54:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-06-05 05:54:14,247 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-06-05 05:54:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:14,247 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-06-05 05:54:14,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-06-05 05:54:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:14,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:14,248 INFO L521 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:14,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 05:54:14,460 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash 455182763, now seen corresponding path program 27 times [2021-06-05 05:54:14,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:14,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605646989] [2021-06-05 05:54:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:14,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:14,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605646989] [2021-06-05 05:54:14,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605646989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:14,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131110973] [2021-06-05 05:54:14,591 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 05:54:14,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 05:54:14,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:54:14,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:14,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131110973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:14,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:14,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 05:54:14,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247410817] [2021-06-05 05:54:14,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:54:14,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:14,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:54:14,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:54:14,708 INFO L87 Difference]: Start difference. First operand 91 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:14,752 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-06-05 05:54:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:54:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:14,753 INFO L225 Difference]: With dead ends: 645 [2021-06-05 05:54:14,753 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 05:54:14,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:54:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 05:54:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-06-05 05:54:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-06-05 05:54:14,761 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-06-05 05:54:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:14,761 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-06-05 05:54:14,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-06-05 05:54:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:54:14,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:14,762 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:14,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:54:14,976 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:14,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1496120374, now seen corresponding path program 28 times [2021-06-05 05:54:14,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:14,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397739247] [2021-06-05 05:54:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:15,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:15,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397739247] [2021-06-05 05:54:15,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397739247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:15,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427364053] [2021-06-05 05:54:15,484 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 05:54:15,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:15,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 05:54:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:15,594 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 05:54:15,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:15,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:15,597 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 05:54:15,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:54:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:15,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427364053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:15,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:15,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 05:54:15,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484516423] [2021-06-05 05:54:15,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:54:15,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:15,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:54:15,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:54:15,604 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:16,974 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-06-05 05:54:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:54:16,975 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:54:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:16,976 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 05:54:16,976 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 05:54:16,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1486.5ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:54:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 05:54:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-06-05 05:54:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-06-05 05:54:16,980 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-06-05 05:54:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:16,980 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-06-05 05:54:16,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-06-05 05:54:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:54:16,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:16,981 INFO L521 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:17,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:17,197 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash -841837961, now seen corresponding path program 29 times [2021-06-05 05:54:17,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:17,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271607392] [2021-06-05 05:54:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:17,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271607392] [2021-06-05 05:54:17,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271607392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361573166] [2021-06-05 05:54:17,353 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 05:54:17,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:54:17,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:17,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:54:17,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:17,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361573166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:17,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:17,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-06-05 05:54:17,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92150225] [2021-06-05 05:54:17,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:54:17,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:54:17,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:54:17,490 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:17,527 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-06-05 05:54:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:54:17,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:54:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:17,529 INFO L225 Difference]: With dead ends: 710 [2021-06-05 05:54:17,529 INFO L226 Difference]: Without dead ends: 675 [2021-06-05 05:54:17,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:54:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-05 05:54:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-06-05 05:54:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-06-05 05:54:17,536 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-06-05 05:54:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:17,537 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-06-05 05:54:17,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-06-05 05:54:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:54:17,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:17,537 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:17,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:54:17,757 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1228173758, now seen corresponding path program 30 times [2021-06-05 05:54:17,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:17,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109540367] [2021-06-05 05:54:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:18,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:18,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109540367] [2021-06-05 05:54:18,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109540367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:18,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370841471] [2021-06-05 05:54:18,355 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 05:54:18,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:54:18,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:18,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 05:54:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:20,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:20,047 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:54:20,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:20,053 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 05:54:20,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 05:54:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370841471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:20,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:20,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-06-05 05:54:20,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255042481] [2021-06-05 05:54:20,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 05:54:20,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 05:54:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:54:20,060 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:34,638 INFO L93 Difference]: Finished difference Result 5479 states and 10739 transitions. [2021-06-05 05:54:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-05 05:54:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:54:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:34,647 INFO L225 Difference]: With dead ends: 5479 [2021-06-05 05:54:34,647 INFO L226 Difference]: Without dead ends: 3672 [2021-06-05 05:54:34,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 15109.0ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 05:54:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-06-05 05:54:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 595. [2021-06-05 05:54:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0757575757575757) internal successors, (1233), 594 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1233 transitions. [2021-06-05 05:54:34,665 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1233 transitions. Word has length 43 [2021-06-05 05:54:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:34,666 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1233 transitions. [2021-06-05 05:54:34,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1233 transitions. [2021-06-05 05:54:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:54:34,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:34,666 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:34,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:34,881 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:34,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1297123594, now seen corresponding path program 31 times [2021-06-05 05:54:34,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:34,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601367091] [2021-06-05 05:54:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:35,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:35,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601367091] [2021-06-05 05:54:35,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601367091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:35,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275713795] [2021-06-05 05:54:35,528 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 05:54:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 05:54:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:35,642 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 05:54:35,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:35,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:35,644 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 05:54:35,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:54:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:35,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275713795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:35,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:35,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 05:54:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229727686] [2021-06-05 05:54:35,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:54:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:54:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:54:35,650 INFO L87 Difference]: Start difference. First operand 595 states and 1233 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:37,398 INFO L93 Difference]: Finished difference Result 1255 states and 2466 transitions. [2021-06-05 05:54:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:54:37,398 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:54:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:37,400 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 05:54:37,400 INFO L226 Difference]: Without dead ends: 805 [2021-06-05 05:54:37,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1917.3ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:54:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-06-05 05:54:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 106. [2021-06-05 05:54:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 105 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2021-06-05 05:54:37,405 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2021-06-05 05:54:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:37,405 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2021-06-05 05:54:37,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2021-06-05 05:54:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:54:37,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:37,406 INFO L521 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:37,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:54:37,617 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1533055049, now seen corresponding path program 32 times [2021-06-05 05:54:37,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:37,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610200501] [2021-06-05 05:54:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:37,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:37,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610200501] [2021-06-05 05:54:37,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610200501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:37,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117399843] [2021-06-05 05:54:37,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:54:37,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:37,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 05:54:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:37,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117399843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:37,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:37,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-06-05 05:54:37,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661813840] [2021-06-05 05:54:37,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:54:37,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:37,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:54:37,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:54:37,914 INFO L87 Difference]: Start difference. First operand 106 states and 206 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:37,959 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2021-06-05 05:54:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:54:37,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:54:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:37,962 INFO L225 Difference]: With dead ends: 849 [2021-06-05 05:54:37,962 INFO L226 Difference]: Without dead ends: 810 [2021-06-05 05:54:37,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:54:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-06-05 05:54:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2021-06-05 05:54:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.0705035971223023) internal successors, (1439), 695 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2021-06-05 05:54:37,969 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2021-06-05 05:54:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:37,969 INFO L482 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2021-06-05 05:54:37,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2021-06-05 05:54:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:54:37,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:37,970 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:38,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:54:38,177 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash 768577026, now seen corresponding path program 33 times [2021-06-05 05:54:38,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:38,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304543035] [2021-06-05 05:54:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:38,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:38,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304543035] [2021-06-05 05:54:38,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304543035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:38,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742027503] [2021-06-05 05:54:38,891 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 05:54:38,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 05:54:38,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-05 05:54:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:39,034 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 05:54:39,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:39,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:39,037 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 05:54:39,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:54:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:39,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742027503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:39,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:39,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-06-05 05:54:39,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128280976] [2021-06-05 05:54:39,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:54:39,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:39,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:54:39,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:54:39,043 INFO L87 Difference]: Start difference. First operand 696 states and 1439 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:41,005 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2021-06-05 05:54:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:54:41,005 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:54:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:41,007 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 05:54:41,007 INFO L226 Difference]: Without dead ends: 889 [2021-06-05 05:54:41,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2142.6ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:54:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-05 05:54:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2021-06-05 05:54:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-06-05 05:54:41,011 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-06-05 05:54:41,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:41,011 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-06-05 05:54:41,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-06-05 05:54:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 05:54:41,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:41,011 INFO L521 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:41,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:54:41,218 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:41,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1920845269, now seen corresponding path program 34 times [2021-06-05 05:54:41,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:41,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655802721] [2021-06-05 05:54:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:41,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:41,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655802721] [2021-06-05 05:54:41,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655802721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:41,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229719327] [2021-06-05 05:54:41,395 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 05:54:41,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:41,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:41,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 05:54:41,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:41,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229719327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:41,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:41,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-06-05 05:54:41,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151667212] [2021-06-05 05:54:41,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:54:41,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:54:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:54:41,521 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:41,569 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-06-05 05:54:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:54:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 05:54:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:41,572 INFO L225 Difference]: With dead ends: 923 [2021-06-05 05:54:41,572 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 05:54:41,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:54:41,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 05:54:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-06-05 05:54:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-06-05 05:54:41,579 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-06-05 05:54:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:41,579 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-06-05 05:54:41,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-06-05 05:54:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:54:41,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:41,580 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:41,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:54:41,796 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1960578634, now seen corresponding path program 35 times [2021-06-05 05:54:41,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:41,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119012473] [2021-06-05 05:54:41,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:42,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119012473] [2021-06-05 05:54:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119012473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682940801] [2021-06-05 05:54:42,583 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 05:54:42,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 05:54:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:44,794 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:54:44,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:44,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:44,799 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 05:54:44,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 05:54:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:44,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682940801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:44,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:44,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-06-05 05:54:44,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636249618] [2021-06-05 05:54:44,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-06-05 05:54:44,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:44,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-06-05 05:54:44,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:54:44,805 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 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 05:55:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:09,436 INFO L93 Difference]: Finished difference Result 8032 states and 15779 transitions. [2021-06-05 05:55:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-06-05 05:55:09,437 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 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 49 [2021-06-05 05:55:09,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:09,449 INFO L225 Difference]: With dead ends: 8032 [2021-06-05 05:55:09,449 INFO L226 Difference]: Without dead ends: 5607 [2021-06-05 05:55:09,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 24708.6ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-06-05 05:55:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-06-05 05:55:09,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 787. [2021-06-05 05:55:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.068702290076336) internal successors, (1626), 786 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1626 transitions. [2021-06-05 05:55:09,474 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1626 transitions. Word has length 49 [2021-06-05 05:55:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:09,474 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1626 transitions. [2021-06-05 05:55:09,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 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 05:55:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1626 transitions. [2021-06-05 05:55:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:55:09,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:09,475 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:09,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:55:09,684 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:09,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash -154382910, now seen corresponding path program 36 times [2021-06-05 05:55:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:09,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193127437] [2021-06-05 05:55:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:10,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:10,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193127437] [2021-06-05 05:55:10,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193127437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:10,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609571579] [2021-06-05 05:55:10,596 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 05:55:10,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 05:55:10,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-05 05:55:10,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:10,737 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 05:55:10,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:10,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:10,739 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 05:55:10,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:10,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609571579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:10,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:10,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-06-05 05:55:10,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689033336] [2021-06-05 05:55:10,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:55:10,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:10,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:55:10,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:55:10,747 INFO L87 Difference]: Start difference. First operand 787 states and 1626 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:13,191 INFO L93 Difference]: Finished difference Result 1651 states and 3252 transitions. [2021-06-05 05:55:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:55:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 05:55:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:13,194 INFO L225 Difference]: With dead ends: 1651 [2021-06-05 05:55:13,194 INFO L226 Difference]: Without dead ends: 1063 [2021-06-05 05:55:13,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2700.2ms TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:55:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-05 05:55:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 121. [2021-06-05 05:55:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9666666666666666) internal successors, (236), 120 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 236 transitions. [2021-06-05 05:55:13,198 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 236 transitions. Word has length 51 [2021-06-05 05:55:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:13,198 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 236 transitions. [2021-06-05 05:55:13,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:13,198 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 236 transitions. [2021-06-05 05:55:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 05:55:13,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:13,198 INFO L521 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:13,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:55:13,402 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:13,402 INFO L82 PathProgramCache]: Analyzing trace with hash -467832213, now seen corresponding path program 37 times [2021-06-05 05:55:13,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:13,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848895442] [2021-06-05 05:55:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:13,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:13,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848895442] [2021-06-05 05:55:13,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848895442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:13,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314346758] [2021-06-05 05:55:13,617 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 05:55:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:13,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:55:13,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:13,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314346758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:13,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:13,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-06-05 05:55:13,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313624271] [2021-06-05 05:55:13,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:55:13,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:13,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:55:13,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:55:13,774 INFO L87 Difference]: Start difference. First operand 121 states and 236 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:13,830 INFO L93 Difference]: Finished difference Result 1080 states and 2082 transitions. [2021-06-05 05:55:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:55:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 05:55:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:13,831 INFO L225 Difference]: With dead ends: 1080 [2021-06-05 05:55:13,831 INFO L226 Difference]: Without dead ends: 1035 [2021-06-05 05:55:13,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:55:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-06-05 05:55:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 903. [2021-06-05 05:55:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0643015521064303) internal successors, (1862), 902 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1862 transitions. [2021-06-05 05:55:13,841 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1862 transitions. Word has length 52 [2021-06-05 05:55:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:13,841 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 1862 transitions. [2021-06-05 05:55:13,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1862 transitions. [2021-06-05 05:55:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 05:55:13,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:13,842 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:14,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:55:14,058 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:14,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1135766646, now seen corresponding path program 38 times [2021-06-05 05:55:14,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:14,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450960992] [2021-06-05 05:55:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:15,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450960992] [2021-06-05 05:55:15,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450960992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178681602] [2021-06-05 05:55:15,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:55:15,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:15,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-05 05:55:15,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:15,142 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 05:55:15,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:15,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:15,145 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 05:55:15,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:15,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178681602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:15,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:15,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-06-05 05:55:15,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338373032] [2021-06-05 05:55:15,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:55:15,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:15,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:55:15,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:55:15,152 INFO L87 Difference]: Start difference. First operand 903 states and 1862 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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 05:55:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:17,873 INFO L93 Difference]: Finished difference Result 1845 states and 3635 transitions. [2021-06-05 05:55:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:55:17,873 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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 53 [2021-06-05 05:55:17,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:17,874 INFO L225 Difference]: With dead ends: 1845 [2021-06-05 05:55:17,874 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 05:55:17,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2958.7ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:55:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 05:55:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 126. [2021-06-05 05:55:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-06-05 05:55:17,878 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-06-05 05:55:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:17,879 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-06-05 05:55:17,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 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 05:55:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-06-05 05:55:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:17,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:17,879 INFO L521 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:18,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:55:18,095 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:18,096 INFO L82 PathProgramCache]: Analyzing trace with hash 872098359, now seen corresponding path program 39 times [2021-06-05 05:55:18,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:18,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345121026] [2021-06-05 05:55:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:18,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345121026] [2021-06-05 05:55:18,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345121026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:18,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760378930] [2021-06-05 05:55:18,398 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 05:55:18,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 05:55:18,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:18,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:18,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760378930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:18,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:18,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-06-05 05:55:18,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862054871] [2021-06-05 05:55:18,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:55:18,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:18,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:55:18,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:55:18,541 INFO L87 Difference]: Start difference. First operand 126 states and 246 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 05:55:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:18,600 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-06-05 05:55:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:55:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 54 [2021-06-05 05:55:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:18,601 INFO L225 Difference]: With dead ends: 1163 [2021-06-05 05:55:18,601 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 05:55:18,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:55:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 05:55:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-06-05 05:55:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-06-05 05:55:18,611 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-06-05 05:55:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:18,611 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-06-05 05:55:18,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 05:55:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-06-05 05:55:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:55:18,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:18,612 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:18,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:18,828 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash 37342594, now seen corresponding path program 40 times [2021-06-05 05:55:18,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:18,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118849604] [2021-06-05 05:55:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:19,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:19,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118849604] [2021-06-05 05:55:19,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118849604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:19,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054355984] [2021-06-05 05:55:19,889 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 05:55:19,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:19,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:19,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-05 05:55:19,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:20,032 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 05:55:20,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:20,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:20,035 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 05:55:20,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:20,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054355984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:20,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:20,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-06-05 05:55:20,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637650107] [2021-06-05 05:55:20,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:55:20,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:20,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:55:20,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:55:20,040 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:23,048 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-06-05 05:55:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:55:23,048 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:55:23,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:23,049 INFO L225 Difference]: With dead ends: 1997 [2021-06-05 05:55:23,049 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 05:55:23,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3289.0ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:55:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 05:55:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-06-05 05:55:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.9692307692307693) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-06-05 05:55:23,054 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-06-05 05:55:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:23,054 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-06-05 05:55:23,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-06-05 05:55:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 05:55:23,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:23,054 INFO L521 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:23,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:23,255 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:23,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1180691115, now seen corresponding path program 41 times [2021-06-05 05:55:23,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:23,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330582582] [2021-06-05 05:55:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:23,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330582582] [2021-06-05 05:55:23,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330582582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365333750] [2021-06-05 05:55:23,559 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 05:55:23,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 05:55:23,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:23,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:55:23,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:23,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365333750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:23,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:23,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-06-05 05:55:23,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025045581] [2021-06-05 05:55:23,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:55:23,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:23,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:55:23,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:55:23,719 INFO L87 Difference]: Start difference. First operand 131 states and 256 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:23,782 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-06-05 05:55:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:55:23,782 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 05:55:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:23,783 INFO L225 Difference]: With dead ends: 1249 [2021-06-05 05:55:23,783 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 05:55:23,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:55:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 05:55:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-06-05 05:55:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.060663507109005) internal successors, (2174), 1055 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-06-05 05:55:23,793 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-06-05 05:55:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:23,793 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-06-05 05:55:23,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-06-05 05:55:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 05:55:23,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:23,794 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:24,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 05:55:24,009 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:24,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:24,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2139285302, now seen corresponding path program 42 times [2021-06-05 05:55:24,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:24,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612044065] [2021-06-05 05:55:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:25,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:25,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612044065] [2021-06-05 05:55:25,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612044065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:25,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744172502] [2021-06-05 05:55:25,063 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 05:55:25,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 05:55:25,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-05 05:55:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:25,224 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 05:55:25,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:25,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:25,226 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 05:55:25,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:25,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744172502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:25,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:25,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-06-05 05:55:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784867553] [2021-06-05 05:55:25,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:55:25,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:55:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:55:25,231 INFO L87 Difference]: Start difference. First operand 1056 states and 2174 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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 05:55:28,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:28,477 INFO L93 Difference]: Finished difference Result 2155 states and 4251 transitions. [2021-06-05 05:55:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:55:28,477 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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 57 [2021-06-05 05:55:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:28,479 INFO L225 Difference]: With dead ends: 2155 [2021-06-05 05:55:28,479 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 05:55:28,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3470.4ms TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 05:55:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 05:55:28,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 136. [2021-06-05 05:55:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 135 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2021-06-05 05:55:28,484 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2021-06-05 05:55:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:28,484 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2021-06-05 05:55:28,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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 05:55:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2021-06-05 05:55:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 05:55:28,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:28,484 INFO L521 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:28,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:28,700 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:28,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1916405623, now seen corresponding path program 43 times [2021-06-05 05:55:28,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:28,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883663595] [2021-06-05 05:55:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:28,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:28,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883663595] [2021-06-05 05:55:28,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883663595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:28,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064943686] [2021-06-05 05:55:28,980 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 05:55:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:55:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:29,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064943686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:29,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:29,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2021-06-05 05:55:29,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789111997] [2021-06-05 05:55:29,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:55:29,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:29,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:55:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:55:29,133 INFO L87 Difference]: Start difference. First operand 136 states and 266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:29,196 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2021-06-05 05:55:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:55:29,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 05:55:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:29,198 INFO L225 Difference]: With dead ends: 1338 [2021-06-05 05:55:29,198 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 05:55:29,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:55:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 05:55:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2021-06-05 05:55:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.0589788732394365) internal successors, (2339), 1136 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2021-06-05 05:55:29,207 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2021-06-05 05:55:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:29,207 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2021-06-05 05:55:29,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2021-06-05 05:55:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:55:29,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:29,209 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:29,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:29,424 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:29,424 INFO L82 PathProgramCache]: Analyzing trace with hash -292549310, now seen corresponding path program 44 times [2021-06-05 05:55:29,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:29,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415653567] [2021-06-05 05:55:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:30,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:30,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415653567] [2021-06-05 05:55:30,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415653567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:30,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670210384] [2021-06-05 05:55:30,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:55:30,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:30,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:30,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-05 05:55:30,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:30,718 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 05:55:30,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:30,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:30,720 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 05:55:30,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:30,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670210384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:30,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:30,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-06-05 05:55:30,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81520951] [2021-06-05 05:55:30,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 05:55:30,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:30,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 05:55:30,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:55:30,726 INFO L87 Difference]: Start difference. First operand 1137 states and 2339 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:34,281 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2021-06-05 05:55:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:55:34,282 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:55:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:34,285 INFO L225 Difference]: With dead ends: 2319 [2021-06-05 05:55:34,285 INFO L226 Difference]: Without dead ends: 1465 [2021-06-05 05:55:34,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3795.2ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 05:55:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-05 05:55:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2021-06-05 05:55:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-06-05 05:55:34,290 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-06-05 05:55:34,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:34,290 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-06-05 05:55:34,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-06-05 05:55:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 05:55:34,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:34,291 INFO L521 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:34,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 05:55:34,497 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:34,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:34,497 INFO L82 PathProgramCache]: Analyzing trace with hash -456023317, now seen corresponding path program 45 times [2021-06-05 05:55:34,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:34,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774800755] [2021-06-05 05:55:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:34,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:34,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774800755] [2021-06-05 05:55:34,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774800755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:34,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098620781] [2021-06-05 05:55:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:55:34,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 05:55:34,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:55:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:34,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098620781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:34,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:34,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-06-05 05:55:34,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640518571] [2021-06-05 05:55:34,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:55:34,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:55:34,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:55:34,974 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:35,044 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-06-05 05:55:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:55:35,045 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 05:55:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:35,046 INFO L225 Difference]: With dead ends: 1430 [2021-06-05 05:55:35,046 INFO L226 Difference]: Without dead ends: 1377 [2021-06-05 05:55:35,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:55:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-06-05 05:55:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-06-05 05:55:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-06-05 05:55:35,057 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-06-05 05:55:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:35,057 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-06-05 05:55:35,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-06-05 05:55:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 05:55:35,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:35,058 INFO L521 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:35,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 05:55:35,274 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:35,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:35,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1547869706, now seen corresponding path program 46 times [2021-06-05 05:55:35,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:35,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983702016] [2021-06-05 05:55:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:36,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:36,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983702016] [2021-06-05 05:55:36,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983702016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:36,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992379700] [2021-06-05 05:55:36,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:55:36,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:36,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:36,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-06-05 05:55:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:36,646 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 05:55:36,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:36,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:36,648 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 05:55:36,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:36,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992379700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:36,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:36,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-06-05 05:55:36,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562230846] [2021-06-05 05:55:36,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:55:36,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:36,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:55:36,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:55:36,653 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:40,506 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2021-06-05 05:55:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:55:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 05:55:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:40,508 INFO L225 Difference]: With dead ends: 2489 [2021-06-05 05:55:40,508 INFO L226 Difference]: Without dead ends: 1575 [2021-06-05 05:55:40,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4122.8ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 05:55:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-06-05 05:55:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2021-06-05 05:55:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2021-06-05 05:55:40,513 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2021-06-05 05:55:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:40,513 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2021-06-05 05:55:40,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2021-06-05 05:55:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 05:55:40,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:40,514 INFO L521 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:40,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 05:55:40,716 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:40,716 INFO L82 PathProgramCache]: Analyzing trace with hash -716249929, now seen corresponding path program 47 times [2021-06-05 05:55:40,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:40,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546554675] [2021-06-05 05:55:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:41,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:41,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546554675] [2021-06-05 05:55:41,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546554675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:41,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090994726] [2021-06-05 05:55:41,067 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 05:55:41,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 05:55:41,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:41,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 05:55:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:41,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090994726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:41,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:41,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-06-05 05:55:41,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930937390] [2021-06-05 05:55:41,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:55:41,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:41,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:55:41,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:55:41,236 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:41,315 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2021-06-05 05:55:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:55:41,315 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 05:55:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:41,317 INFO L225 Difference]: With dead ends: 1525 [2021-06-05 05:55:41,317 INFO L226 Difference]: Without dead ends: 1470 [2021-06-05 05:55:41,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:55:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-05 05:55:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2021-06-05 05:55:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2021-06-05 05:55:41,328 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2021-06-05 05:55:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:41,329 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2021-06-05 05:55:41,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2021-06-05 05:55:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:55:41,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:41,330 INFO L521 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:41,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:41,545 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:41,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2008609534, now seen corresponding path program 48 times [2021-06-05 05:55:41,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:41,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722415374] [2021-06-05 05:55:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:42,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:42,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722415374] [2021-06-05 05:55:42,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722415374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:42,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066388265] [2021-06-05 05:55:42,909 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 05:55:42,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 05:55:42,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-06-05 05:55:42,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:43,063 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 05:55:43,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:43,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:43,065 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 05:55:43,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:43,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066388265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:43,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:43,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-06-05 05:55:43,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012662866] [2021-06-05 05:55:43,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 05:55:43,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 05:55:43,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:55:43,071 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:47,266 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2021-06-05 05:55:47,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:55:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:55:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:47,268 INFO L225 Difference]: With dead ends: 2665 [2021-06-05 05:55:47,268 INFO L226 Difference]: Without dead ends: 1689 [2021-06-05 05:55:47,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4519.0ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 05:55:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-06-05 05:55:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2021-06-05 05:55:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-06-05 05:55:47,274 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-06-05 05:55:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:47,274 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-06-05 05:55:47,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-06-05 05:55:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-05 05:55:47,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:47,274 INFO L521 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:47,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:55:47,475 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:47,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:47,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2114282709, now seen corresponding path program 49 times [2021-06-05 05:55:47,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:47,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349700393] [2021-06-05 05:55:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:47,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:47,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349700393] [2021-06-05 05:55:47,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349700393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:47,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096678470] [2021-06-05 05:55:47,811 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 05:55:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:55:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:47,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096678470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:47,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:47,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-06-05 05:55:47,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069821981] [2021-06-05 05:55:47,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:55:47,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:47,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:55:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:55:47,973 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:48,046 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-06-05 05:55:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:55:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-05 05:55:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:48,048 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 05:55:48,048 INFO L226 Difference]: Without dead ends: 1566 [2021-06-05 05:55:48,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:55:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-06-05 05:55:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-06-05 05:55:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-06-05 05:55:48,059 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-06-05 05:55:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:48,059 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-06-05 05:55:48,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-06-05 05:55:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 05:55:48,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:48,061 INFO L521 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:48,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:48,276 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1468652726, now seen corresponding path program 50 times [2021-06-05 05:55:48,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:48,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801489702] [2021-06-05 05:55:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:49,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:49,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801489702] [2021-06-05 05:55:49,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801489702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:49,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786221089] [2021-06-05 05:55:49,703 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 05:55:49,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:49,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:49,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2021-06-05 05:55:49,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:49,864 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 05:55:49,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:49,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:49,866 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 05:55:49,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:49,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786221089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:49,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:49,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-06-05 05:55:49,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856047274] [2021-06-05 05:55:49,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-06-05 05:55:49,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:49,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-06-05 05:55:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:55:49,872 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:54,385 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-06-05 05:55:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:55:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 05:55:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:54,387 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 05:55:54,387 INFO L226 Difference]: Without dead ends: 1807 [2021-06-05 05:55:54,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 4848.7ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 05:55:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-06-05 05:55:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-06-05 05:55:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-06-05 05:55:54,393 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-06-05 05:55:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:54,393 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-06-05 05:55:54,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-06-05 05:55:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 05:55:54,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:54,393 INFO L521 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:54,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:54,602 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:54,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1693335049, now seen corresponding path program 51 times [2021-06-05 05:55:54,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:54,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506859333] [2021-06-05 05:55:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:54,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:54,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506859333] [2021-06-05 05:55:54,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506859333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:54,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432132131] [2021-06-05 05:55:54,970 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 05:55:55,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 05:55:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:55,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:55:55,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:55,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432132131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:55,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:55,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-06-05 05:55:55,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866734463] [2021-06-05 05:55:55,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:55:55,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:55:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:55:55,155 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:55,232 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-06-05 05:55:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:55:55,232 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 05:55:55,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:55,234 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 05:55:55,234 INFO L226 Difference]: Without dead ends: 1665 [2021-06-05 05:55:55,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:55:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-06-05 05:55:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-06-05 05:55:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-06-05 05:55:55,248 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-06-05 05:55:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:55,248 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-06-05 05:55:55,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-06-05 05:55:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:55:55,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:55,249 INFO L521 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:55,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 05:55:55,465 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1238813890, now seen corresponding path program 52 times [2021-06-05 05:55:55,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:55,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40878863] [2021-06-05 05:55:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:57,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:57,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40878863] [2021-06-05 05:55:57,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40878863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:57,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074823565] [2021-06-05 05:55:57,031 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 05:55:57,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:57,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:57,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-06-05 05:55:57,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:57,207 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 05:55:57,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:57,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:57,209 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 05:55:57,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:55:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:57,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074823565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:57,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:57,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-06-05 05:55:57,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679922520] [2021-06-05 05:55:57,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-06-05 05:55:57,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:57,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-06-05 05:55:57,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:55:57,214 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:02,083 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-06-05 05:56:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:56:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:56:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:02,084 INFO L225 Difference]: With dead ends: 3035 [2021-06-05 05:56:02,085 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 05:56:02,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5270.1ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 05:56:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 05:56:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-06-05 05:56:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.975) internal successors, (316), 160 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-06-05 05:56:02,090 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-06-05 05:56:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:02,090 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-06-05 05:56:02,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-06-05 05:56:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-05 05:56:02,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:02,091 INFO L521 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:02,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:02,291 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash -228404373, now seen corresponding path program 53 times [2021-06-05 05:56:02,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:02,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742768499] [2021-06-05 05:56:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:02,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:02,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742768499] [2021-06-05 05:56:02,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742768499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:02,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626923339] [2021-06-05 05:56:02,668 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 05:56:02,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 05:56:02,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:02,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 05:56:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:02,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626923339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:02,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:02,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-06-05 05:56:02,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437474933] [2021-06-05 05:56:02,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:56:02,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:56:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:56:02,857 INFO L87 Difference]: Start difference. First operand 161 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:02,935 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-06-05 05:56:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:56:02,935 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-05 05:56:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:02,937 INFO L225 Difference]: With dead ends: 1828 [2021-06-05 05:56:02,937 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 05:56:02,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:56:02,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 05:56:02,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-06-05 05:56:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.051702395964691) internal successors, (3254), 1586 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-06-05 05:56:02,948 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-06-05 05:56:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:02,948 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-06-05 05:56:02,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-06-05 05:56:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 05:56:02,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:02,949 INFO L521 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:03,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 05:56:03,166 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:03,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:03,167 INFO L82 PathProgramCache]: Analyzing trace with hash 68179830, now seen corresponding path program 54 times [2021-06-05 05:56:03,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:03,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570558939] [2021-06-05 05:56:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:04,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:04,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570558939] [2021-06-05 05:56:04,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570558939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:04,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333631699] [2021-06-05 05:56:04,833 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 05:56:04,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 05:56:04,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-06-05 05:56:04,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:05,001 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 05:56:05,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:05,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:05,003 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 05:56:05,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:56:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:05,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333631699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:05,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:05,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-06-05 05:56:05,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151654807] [2021-06-05 05:56:05,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-05 05:56:05,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-05 05:56:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:56:05,009 INFO L87 Difference]: Start difference. First operand 1587 states and 3254 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:10,333 INFO L93 Difference]: Finished difference Result 3229 states and 6387 transitions. [2021-06-05 05:56:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:56:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 05:56:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:10,334 INFO L225 Difference]: With dead ends: 3229 [2021-06-05 05:56:10,334 INFO L226 Difference]: Without dead ends: 2055 [2021-06-05 05:56:10,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 5732.4ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 05:56:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-06-05 05:56:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 166. [2021-06-05 05:56:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 165 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 326 transitions. [2021-06-05 05:56:10,340 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 326 transitions. Word has length 69 [2021-06-05 05:56:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:10,340 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 326 transitions. [2021-06-05 05:56:10,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 326 transitions. [2021-06-05 05:56:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 05:56:10,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:10,341 INFO L521 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:10,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 05:56:10,541 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2136645431, now seen corresponding path program 55 times [2021-06-05 05:56:10,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:10,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412343532] [2021-06-05 05:56:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:10,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:10,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412343532] [2021-06-05 05:56:10,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412343532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:10,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658001176] [2021-06-05 05:56:10,941 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 05:56:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:10,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-05 05:56:10,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:11,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658001176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:11,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:11,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-06-05 05:56:11,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146615767] [2021-06-05 05:56:11,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:56:11,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:56:11,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:56:11,120 INFO L87 Difference]: Start difference. First operand 166 states and 326 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:56:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:11,207 INFO L93 Difference]: Finished difference Result 1935 states and 3765 transitions. [2021-06-05 05:56:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:56:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 70 [2021-06-05 05:56:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:11,208 INFO L225 Difference]: With dead ends: 1935 [2021-06-05 05:56:11,208 INFO L226 Difference]: Without dead ends: 1872 [2021-06-05 05:56:11,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:56:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-06-05 05:56:11,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1686. [2021-06-05 05:56:11,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.050445103857567) internal successors, (3455), 1685 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3455 transitions. [2021-06-05 05:56:11,221 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3455 transitions. Word has length 70 [2021-06-05 05:56:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:11,221 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 3455 transitions. [2021-06-05 05:56:11,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:56:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3455 transitions. [2021-06-05 05:56:11,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:56:11,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:11,222 INFO L521 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:11,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:11,422 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash -608744318, now seen corresponding path program 56 times [2021-06-05 05:56:11,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:11,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803247051] [2021-06-05 05:56:11,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:13,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:13,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803247051] [2021-06-05 05:56:13,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803247051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:13,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727994326] [2021-06-05 05:56:13,108 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 05:56:13,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:13,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-06-05 05:56:13,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:13,272 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 05:56:13,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:13,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:13,274 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 05:56:13,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:56:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:13,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727994326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:13,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:13,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-06-05 05:56:13,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313779352] [2021-06-05 05:56:13,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-06-05 05:56:13,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-06-05 05:56:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:56:13,280 INFO L87 Difference]: Start difference. First operand 1686 states and 3455 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:19,055 INFO L93 Difference]: Finished difference Result 3429 states and 6785 transitions. [2021-06-05 05:56:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:56:19,056 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 05:56:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:19,057 INFO L225 Difference]: With dead ends: 3429 [2021-06-05 05:56:19,057 INFO L226 Difference]: Without dead ends: 2185 [2021-06-05 05:56:19,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6082.0ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 05:56:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-06-05 05:56:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 171. [2021-06-05 05:56:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.9764705882352942) internal successors, (336), 170 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:19,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2021-06-05 05:56:19,063 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2021-06-05 05:56:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:19,063 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2021-06-05 05:56:19,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:19,063 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2021-06-05 05:56:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 05:56:19,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:19,064 INFO L521 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:19,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:56:19,265 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1668133973, now seen corresponding path program 57 times [2021-06-05 05:56:19,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:19,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482869856] [2021-06-05 05:56:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:19,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:19,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482869856] [2021-06-05 05:56:19,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482869856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:19,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666725036] [2021-06-05 05:56:19,684 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 05:56:19,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 05:56:19,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:19,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 05:56:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:19,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666725036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:19,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:19,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-06-05 05:56:19,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126379792] [2021-06-05 05:56:19,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:56:19,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:56:19,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:56:19,883 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 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 05:56:19,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:19,980 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2021-06-05 05:56:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:56:19,980 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 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 72 [2021-06-05 05:56:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:19,981 INFO L225 Difference]: With dead ends: 2045 [2021-06-05 05:56:19,981 INFO L226 Difference]: Without dead ends: 1980 [2021-06-05 05:56:19,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:56:19,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-05 05:56:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2021-06-05 05:56:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.0492445439283715) internal successors, (3662), 1787 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2021-06-05 05:56:19,994 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2021-06-05 05:56:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:19,994 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2021-06-05 05:56:19,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 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 05:56:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2021-06-05 05:56:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-06-05 05:56:19,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:19,995 INFO L521 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:20,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:20,196 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:20,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1417204278, now seen corresponding path program 58 times [2021-06-05 05:56:20,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:20,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116014338] [2021-06-05 05:56:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:21,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:21,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116014338] [2021-06-05 05:56:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116014338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:21,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046113738] [2021-06-05 05:56:21,975 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 05:56:22,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:56:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-06-05 05:56:22,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:22,144 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 05:56:22,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:22,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:22,146 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 05:56:22,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:56:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:22,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046113738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:22,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:22,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-06-05 05:56:22,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066160364] [2021-06-05 05:56:22,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-06-05 05:56:22,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:22,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-06-05 05:56:22,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:56:22,152 INFO L87 Difference]: Start difference. First operand 1788 states and 3662 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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 05:56:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:28,330 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2021-06-05 05:56:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:56:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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 73 [2021-06-05 05:56:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:28,331 INFO L225 Difference]: With dead ends: 3635 [2021-06-05 05:56:28,331 INFO L226 Difference]: Without dead ends: 2319 [2021-06-05 05:56:28,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6533.9ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 05:56:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-05 05:56:28,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2021-06-05 05:56:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.977142857142857) internal successors, (346), 175 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2021-06-05 05:56:28,338 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2021-06-05 05:56:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:28,338 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2021-06-05 05:56:28,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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 05:56:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2021-06-05 05:56:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-06-05 05:56:28,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:28,338 INFO L521 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:28,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 05:56:28,541 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1006730359, now seen corresponding path program 59 times [2021-06-05 05:56:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:28,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798772633] [2021-06-05 05:56:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:29,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:29,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798772633] [2021-06-05 05:56:29,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798772633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:29,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923820638] [2021-06-05 05:56:29,005 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 05:56:29,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 05:56:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:29,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 05:56:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:29,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923820638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:29,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:29,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-06-05 05:56:29,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094891378] [2021-06-05 05:56:29,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:56:29,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:29,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:56:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:56:29,202 INFO L87 Difference]: Start difference. First operand 176 states and 346 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:29,303 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2021-06-05 05:56:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:56:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-06-05 05:56:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:29,305 INFO L225 Difference]: With dead ends: 2158 [2021-06-05 05:56:29,305 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 05:56:29,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:56:29,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 05:56:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2021-06-05 05:56:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.0480972515856237) internal successors, (3875), 1892 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2021-06-05 05:56:29,319 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2021-06-05 05:56:29,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:29,319 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2021-06-05 05:56:29,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2021-06-05 05:56:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 05:56:29,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:29,321 INFO L521 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:29,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:29,537 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1805611966, now seen corresponding path program 60 times [2021-06-05 05:56:29,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:29,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889926008] [2021-06-05 05:56:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:31,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:31,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889926008] [2021-06-05 05:56:31,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889926008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:31,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152431256] [2021-06-05 05:56:31,437 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 05:56:31,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 05:56:31,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:31,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-06-05 05:56:31,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:31,621 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 05:56:31,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:31,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:31,623 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 05:56:31,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:56:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:31,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152431256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:31,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:31,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-06-05 05:56:31,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021560965] [2021-06-05 05:56:31,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 05:56:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 05:56:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:56:31,629 INFO L87 Difference]: Start difference. First operand 1893 states and 3875 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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 05:56:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:38,236 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2021-06-05 05:56:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:56:38,236 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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 75 [2021-06-05 05:56:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:38,238 INFO L225 Difference]: With dead ends: 3847 [2021-06-05 05:56:38,238 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 05:56:38,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 6990.8ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 05:56:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 05:56:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2021-06-05 05:56:38,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.9777777777777779) internal successors, (356), 180 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2021-06-05 05:56:38,245 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2021-06-05 05:56:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:38,245 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2021-06-05 05:56:38,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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 05:56:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2021-06-05 05:56:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 05:56:38,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:38,245 INFO L521 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:38,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 05:56:38,446 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:38,446 INFO L82 PathProgramCache]: Analyzing trace with hash -116325397, now seen corresponding path program 61 times [2021-06-05 05:56:38,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:38,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530332452] [2021-06-05 05:56:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:38,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:38,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530332452] [2021-06-05 05:56:38,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530332452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:38,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408942225] [2021-06-05 05:56:38,946 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 05:56:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:38,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 05:56:38,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:39,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408942225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:39,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:39,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-06-05 05:56:39,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657320588] [2021-06-05 05:56:39,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:39,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:39,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:39,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:39,149 INFO L87 Difference]: Start difference. First operand 181 states and 356 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 05:56:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:39,246 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2021-06-05 05:56:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:56:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 76 [2021-06-05 05:56:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:39,247 INFO L225 Difference]: With dead ends: 2274 [2021-06-05 05:56:39,247 INFO L226 Difference]: Without dead ends: 2205 [2021-06-05 05:56:39,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-05 05:56:39,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2021-06-05 05:56:39,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 2.047) internal successors, (4094), 2000 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2021-06-05 05:56:39,261 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2021-06-05 05:56:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:39,261 INFO L482 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2021-06-05 05:56:39,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 05:56:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2021-06-05 05:56:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-06-05 05:56:39,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:39,263 INFO L521 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:39,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:39,463 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:39,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:39,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1242870538, now seen corresponding path program 62 times [2021-06-05 05:56:39,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:39,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834147186] [2021-06-05 05:56:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:41,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:41,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834147186] [2021-06-05 05:56:41,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834147186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:41,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373237411] [2021-06-05 05:56:41,461 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 05:56:41,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:41,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 139 conjunts are in the unsatisfiable core [2021-06-05 05:56:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:41,645 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 05:56:41,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:41,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:41,647 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 05:56:41,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:56:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:41,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373237411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:41,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:41,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-06-05 05:56:41,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828478049] [2021-06-05 05:56:41,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 05:56:41,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:41,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 05:56:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:56:41,653 INFO L87 Difference]: Start difference. First operand 2001 states and 4094 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:48,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:48,683 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2021-06-05 05:56:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:56:48,684 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-06-05 05:56:48,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:48,685 INFO L225 Difference]: With dead ends: 4065 [2021-06-05 05:56:48,685 INFO L226 Difference]: Without dead ends: 2599 [2021-06-05 05:56:48,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 7440.9ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-06-05 05:56:48,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-06-05 05:56:48,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2021-06-05 05:56:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.9783783783783784) internal successors, (366), 185 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2021-06-05 05:56:48,692 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2021-06-05 05:56:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:48,693 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2021-06-05 05:56:48,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2021-06-05 05:56:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-06-05 05:56:48,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:48,693 INFO L521 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:48,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 05:56:48,909 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 148789687, now seen corresponding path program 63 times [2021-06-05 05:56:48,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:48,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439186263] [2021-06-05 05:56:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:49,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:49,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439186263] [2021-06-05 05:56:49,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439186263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:49,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115979234] [2021-06-05 05:56:49,409 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 05:56:49,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-05 05:56:49,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-05 05:56:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:49,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115979234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:49,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:49,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-06-05 05:56:49,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695742447] [2021-06-05 05:56:49,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:56:49,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:56:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:56:49,613 INFO L87 Difference]: Start difference. First operand 186 states and 366 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:49,727 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2021-06-05 05:56:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:56:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-06-05 05:56:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:49,728 INFO L225 Difference]: With dead ends: 2393 [2021-06-05 05:56:49,728 INFO L226 Difference]: Without dead ends: 2322 [2021-06-05 05:56:49,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:56:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-06-05 05:56:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2021-06-05 05:56:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.045949786830886) internal successors, (4319), 2111 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2021-06-05 05:56:49,743 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2021-06-05 05:56:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:49,743 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2021-06-05 05:56:49,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2021-06-05 05:56:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-06-05 05:56:49,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:49,744 INFO L521 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:49,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:49,960 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:49,960 INFO L82 PathProgramCache]: Analyzing trace with hash -129332222, now seen corresponding path program 64 times [2021-06-05 05:56:49,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:49,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988241285] [2021-06-05 05:56:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:52,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:52,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988241285] [2021-06-05 05:56:52,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988241285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:52,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169212081] [2021-06-05 05:56:52,141 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 05:56:52,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:56:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:52,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-06-05 05:56:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:52,321 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 05:56:52,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:52,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:52,323 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 05:56:52,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:56:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:52,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169212081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:52,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:52,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-06-05 05:56:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829746917] [2021-06-05 05:56:52,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-06-05 05:56:52,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-06-05 05:56:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:56:52,329 INFO L87 Difference]: Start difference. First operand 2112 states and 4319 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 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 05:56:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:59,888 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2021-06-05 05:56:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:56:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 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 79 [2021-06-05 05:56:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:59,890 INFO L225 Difference]: With dead ends: 4289 [2021-06-05 05:56:59,890 INFO L226 Difference]: Without dead ends: 2745 [2021-06-05 05:56:59,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 8026.3ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 05:56:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-06-05 05:56:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2021-06-05 05:56:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9789473684210526) internal successors, (376), 190 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2021-06-05 05:56:59,897 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2021-06-05 05:56:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:59,897 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2021-06-05 05:56:59,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 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 05:56:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2021-06-05 05:56:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 05:56:59,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:59,898 INFO L521 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:00,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:57:00,098 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:00,099 INFO L82 PathProgramCache]: Analyzing trace with hash 308739115, now seen corresponding path program 65 times [2021-06-05 05:57:00,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:00,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314916037] [2021-06-05 05:57:00,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:00,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314916037] [2021-06-05 05:57:00,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314916037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119595656] [2021-06-05 05:57:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:57:00,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-06-05 05:57:00,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-06-05 05:57:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:00,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119595656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:00,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:00,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-06-05 05:57:00,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33474736] [2021-06-05 05:57:00,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:57:00,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:00,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:57:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:57:00,858 INFO L87 Difference]: Start difference. First operand 191 states and 376 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:00,966 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2021-06-05 05:57:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:57:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 05:57:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:00,968 INFO L225 Difference]: With dead ends: 2515 [2021-06-05 05:57:00,968 INFO L226 Difference]: Without dead ends: 2442 [2021-06-05 05:57:00,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:57:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-05 05:57:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2021-06-05 05:57:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.044943820224719) internal successors, (4550), 2225 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2021-06-05 05:57:00,983 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2021-06-05 05:57:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:00,983 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2021-06-05 05:57:00,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2021-06-05 05:57:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-06-05 05:57:00,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:00,984 INFO L521 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:01,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 05:57:01,185 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash -678443082, now seen corresponding path program 66 times [2021-06-05 05:57:01,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:01,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344926759] [2021-06-05 05:57:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:03,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:03,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344926759] [2021-06-05 05:57:03,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344926759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:03,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193389124] [2021-06-05 05:57:03,411 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 05:57:03,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-06-05 05:57:03,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:03,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-06-05 05:57:03,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:03,610 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 05:57:03,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:03,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:03,612 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 05:57:03,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:57:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:03,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193389124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:03,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:03,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-06-05 05:57:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501500074] [2021-06-05 05:57:03,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-05 05:57:03,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-05 05:57:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:57:03,617 INFO L87 Difference]: Start difference. First operand 2226 states and 4550 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:11,680 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2021-06-05 05:57:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:57:11,680 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-06-05 05:57:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:11,682 INFO L225 Difference]: With dead ends: 4519 [2021-06-05 05:57:11,682 INFO L226 Difference]: Without dead ends: 2895 [2021-06-05 05:57:11,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 8495.6ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 05:57:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-06-05 05:57:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2021-06-05 05:57:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 195 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2021-06-05 05:57:11,690 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2021-06-05 05:57:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:11,691 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2021-06-05 05:57:11,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2021-06-05 05:57:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-06-05 05:57:11,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:11,691 INFO L521 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:11,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:57:11,905 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash 466171639, now seen corresponding path program 67 times [2021-06-05 05:57:11,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:11,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227536652] [2021-06-05 05:57:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:12,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:12,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227536652] [2021-06-05 05:57:12,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227536652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:12,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398510721] [2021-06-05 05:57:12,458 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 05:57:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:12,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 05:57:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:12,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398510721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:12,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:12,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-06-05 05:57:12,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893347419] [2021-06-05 05:57:12,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:57:12,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:12,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:57:12,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:57:12,667 INFO L87 Difference]: Start difference. First operand 196 states and 386 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 05:57:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:12,778 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2021-06-05 05:57:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:57:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 82 [2021-06-05 05:57:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:12,780 INFO L225 Difference]: With dead ends: 2640 [2021-06-05 05:57:12,780 INFO L226 Difference]: Without dead ends: 2565 [2021-06-05 05:57:12,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 516.2ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:57:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-06-05 05:57:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2021-06-05 05:57:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.04397950469684) internal successors, (4787), 2342 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2021-06-05 05:57:12,796 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2021-06-05 05:57:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:12,796 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2021-06-05 05:57:12,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 05:57:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2021-06-05 05:57:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-06-05 05:57:12,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:12,798 INFO L521 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:12,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:12,999 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:12,999 INFO L82 PathProgramCache]: Analyzing trace with hash 971852738, now seen corresponding path program 68 times [2021-06-05 05:57:12,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:12,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663749466] [2021-06-05 05:57:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:15,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663749466] [2021-06-05 05:57:15,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663749466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697317337] [2021-06-05 05:57:15,378 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 05:57:15,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:57:15,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:15,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 151 conjunts are in the unsatisfiable core [2021-06-05 05:57:15,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:15,587 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 05:57:15,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:15,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:15,589 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 05:57:15,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:57:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:15,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697317337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:15,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:15,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-06-05 05:57:15,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758866726] [2021-06-05 05:57:15,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-06-05 05:57:15,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:15,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-06-05 05:57:15,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:57:15,595 INFO L87 Difference]: Start difference. First operand 2343 states and 4787 transitions. Second operand has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:24,177 INFO L93 Difference]: Finished difference Result 4755 states and 9425 transitions. [2021-06-05 05:57:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:57:24,177 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-06-05 05:57:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:24,179 INFO L225 Difference]: With dead ends: 4755 [2021-06-05 05:57:24,179 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 05:57:24,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 9079.5ms TimeCoverageRelationStatistics Valid=3111, Invalid=19539, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 05:57:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 05:57:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 201. [2021-06-05 05:57:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.98) internal successors, (396), 200 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 396 transitions. [2021-06-05 05:57:24,187 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 396 transitions. Word has length 83 [2021-06-05 05:57:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:24,187 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 396 transitions. [2021-06-05 05:57:24,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 396 transitions. [2021-06-05 05:57:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-05 05:57:24,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:24,188 INFO L521 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:24,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 05:57:24,403 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash 85734507, now seen corresponding path program 69 times [2021-06-05 05:57:24,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:24,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524188409] [2021-06-05 05:57:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:24,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:24,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524188409] [2021-06-05 05:57:24,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524188409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:24,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552284206] [2021-06-05 05:57:24,986 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 05:57:25,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-06-05 05:57:25,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 05:57:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:25,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552284206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:25,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:25,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 40 [2021-06-05 05:57:25,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460343842] [2021-06-05 05:57:25,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:57:25,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:25,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:57:25,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:57:25,208 INFO L87 Difference]: Start difference. First operand 201 states and 396 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 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 05:57:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:25,331 INFO L93 Difference]: Finished difference Result 2768 states and 5410 transitions. [2021-06-05 05:57:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:57:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 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 84 [2021-06-05 05:57:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:25,333 INFO L225 Difference]: With dead ends: 2768 [2021-06-05 05:57:25,333 INFO L226 Difference]: Without dead ends: 2691 [2021-06-05 05:57:25,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 543.4ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:57:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-06-05 05:57:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2463. [2021-06-05 05:57:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.0430544272948823) internal successors, (5030), 2462 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 5030 transitions. [2021-06-05 05:57:25,350 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 5030 transitions. Word has length 84 [2021-06-05 05:57:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:25,350 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 5030 transitions. [2021-06-05 05:57:25,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 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 05:57:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 5030 transitions. [2021-06-05 05:57:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 05:57:25,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:25,351 INFO L521 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:25,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:25,553 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:25,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:25,553 INFO L82 PathProgramCache]: Analyzing trace with hash 713966198, now seen corresponding path program 70 times [2021-06-05 05:57:25,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:25,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534244397] [2021-06-05 05:57:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:28,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:28,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534244397] [2021-06-05 05:57:28,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534244397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:28,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414532473] [2021-06-05 05:57:28,032 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 05:57:28,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:28,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-06-05 05:57:28,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:28,225 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 05:57:28,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:28,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:28,227 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 05:57:28,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:57:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:28,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414532473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:28,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:28,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-06-05 05:57:28,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986686722] [2021-06-05 05:57:28,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-06-05 05:57:28,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-06-05 05:57:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:57:28,233 INFO L87 Difference]: Start difference. First operand 2463 states and 5030 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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 05:57:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:37,363 INFO L93 Difference]: Finished difference Result 4997 states and 9907 transitions. [2021-06-05 05:57:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 05:57:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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 85 [2021-06-05 05:57:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:37,365 INFO L225 Difference]: With dead ends: 4997 [2021-06-05 05:57:37,365 INFO L226 Difference]: Without dead ends: 3207 [2021-06-05 05:57:37,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 9630.0ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-06-05 05:57:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2021-06-05 05:57:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 206. [2021-06-05 05:57:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.9804878048780488) internal successors, (406), 205 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 406 transitions. [2021-06-05 05:57:37,374 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 406 transitions. Word has length 85 [2021-06-05 05:57:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:37,374 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 406 transitions. [2021-06-05 05:57:37,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 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 05:57:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 406 transitions. [2021-06-05 05:57:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 05:57:37,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:37,374 INFO L521 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:37,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 05:57:37,575 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:37,575 INFO L82 PathProgramCache]: Analyzing trace with hash 681186359, now seen corresponding path program 71 times [2021-06-05 05:57:37,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:37,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637407671] [2021-06-05 05:57:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:38,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:38,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637407671] [2021-06-05 05:57:38,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637407671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:38,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610506591] [2021-06-05 05:57:38,195 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 05:57:38,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-06-05 05:57:38,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:38,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-06-05 05:57:38,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:38,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610506591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:38,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:38,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-06-05 05:57:38,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766741343] [2021-06-05 05:57:38,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:57:38,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:57:38,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:57:38,443 INFO L87 Difference]: Start difference. First operand 206 states and 406 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 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 05:57:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:38,573 INFO L93 Difference]: Finished difference Result 2899 states and 5669 transitions. [2021-06-05 05:57:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:57:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 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 86 [2021-06-05 05:57:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:38,575 INFO L225 Difference]: With dead ends: 2899 [2021-06-05 05:57:38,575 INFO L226 Difference]: Without dead ends: 2820 [2021-06-05 05:57:38,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:57:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-05 05:57:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2586. [2021-06-05 05:57:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 2.042166344294004) internal successors, (5279), 2585 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5279 transitions. [2021-06-05 05:57:38,592 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5279 transitions. Word has length 86 [2021-06-05 05:57:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:38,592 INFO L482 AbstractCegarLoop]: Abstraction has 2586 states and 5279 transitions. [2021-06-05 05:57:38,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 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 05:57:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5279 transitions. [2021-06-05 05:57:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-06-05 05:57:38,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:38,594 INFO L521 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:38,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:38,794 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:38,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:38,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1178547326, now seen corresponding path program 72 times [2021-06-05 05:57:38,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:38,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552596127] [2021-06-05 05:57:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:41,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:41,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552596127] [2021-06-05 05:57:41,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552596127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:41,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452718696] [2021-06-05 05:57:41,386 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 05:57:41,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-06-05 05:57:41,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:41,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 84 conjunts are in the unsatisfiable core [2021-06-05 05:57:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:49,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:49,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:57:49,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:49,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:49,102 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 05:57:49,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 05:57:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 741 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452718696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:49,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:49,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 158 [2021-06-05 05:57:49,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138728300] [2021-06-05 05:57:49,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 159 states [2021-06-05 05:57:49,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-06-05 05:57:49,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3318, Invalid=21804, Unknown=0, NotChecked=0, Total=25122 [2021-06-05 05:57:49,109 INFO L87 Difference]: Start difference. First operand 2586 states and 5279 transitions. Second operand has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:53,357 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-05 05:57:53,620 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-05 05:57:53,895 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-05 05:57:54,265 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2021-06-05 05:57:54,553 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-06-05 05:57:54,851 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-06-05 05:57:55,158 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-06-05 05:57:55,469 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-06-05 05:57:55,791 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-05 05:57:56,123 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-05 05:57:56,473 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-06-05 05:57:56,840 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 149 [2021-06-05 05:57:57,192 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-06-05 05:57:57,554 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-06-05 05:57:57,938 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-06-05 05:57:58,325 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-05 05:57:58,607 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 05:57:59,168 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 05:57:59,587 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:01:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:01:57,805 INFO L93 Difference]: Finished difference Result 43429 states and 85946 transitions. [2021-06-05 06:01:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 940 states. [2021-06-05 06:01:57,805 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-06-05 06:01:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:01:57,838 INFO L225 Difference]: With dead ends: 43429 [2021-06-05 06:01:57,838 INFO L226 Difference]: Without dead ends: 35000 [2021-06-05 06:01:57,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1055 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431709 ImplicationChecksByTransitivity, 238965.7ms TimeCoverageRelationStatistics Valid=188064, Invalid=928128, Unknown=0, NotChecked=0, Total=1116192 [2021-06-05 06:01:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35000 states. [2021-06-05 06:01:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35000 to 2630. [2021-06-05 06:01:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 2.0422213769494104) internal successors, (5369), 2629 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 5369 transitions. [2021-06-05 06:01:58,062 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 5369 transitions. Word has length 87 [2021-06-05 06:01:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:01:58,062 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 5369 transitions. [2021-06-05 06:01:58,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:01:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 5369 transitions. [2021-06-05 06:01:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-05 06:01:58,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:01:58,064 INFO L521 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:01:58,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:01:58,264 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:01:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:01:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1645133110, now seen corresponding path program 73 times [2021-06-05 06:01:58,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:01:58,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296451639] [2021-06-05 06:01:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:01:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:01,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296451639] [2021-06-05 06:02:01,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296451639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:01,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005486585] [2021-06-05 06:02:01,059 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 06:02:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 163 conjunts are in the unsatisfiable core [2021-06-05 06:02:01,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:01,290 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 06:02:01,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:02:01,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:02:01,292 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 06:02:01,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:02:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:01,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005486585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:01,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:01,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-06-05 06:02:01,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721258178] [2021-06-05 06:02:01,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-06-05 06:02:01,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:01,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-06-05 06:02:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 06:02:01,298 INFO L87 Difference]: Start difference. First operand 2630 states and 5369 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 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 06:02:06,763 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 06:02:06,962 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:02:08,001 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-05 06:02:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:11,963 INFO L93 Difference]: Finished difference Result 5413 states and 10738 transitions. [2021-06-05 06:02:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 06:02:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 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 89 [2021-06-05 06:02:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:11,966 INFO L225 Difference]: With dead ends: 5413 [2021-06-05 06:02:11,966 INFO L226 Difference]: Without dead ends: 3533 [2021-06-05 06:02:11,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 11210.4ms TimeCoverageRelationStatistics Valid=3603, Invalid=22803, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 06:02:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2021-06-05 06:02:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 216. [2021-06-05 06:02:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.9813953488372094) internal successors, (426), 215 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 426 transitions. [2021-06-05 06:02:11,975 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 426 transitions. Word has length 89 [2021-06-05 06:02:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:11,975 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 426 transitions. [2021-06-05 06:02:11,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 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 06:02:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 426 transitions. [2021-06-05 06:02:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 06:02:11,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:11,976 INFO L521 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:02:12,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:12,176 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:12,176 INFO L82 PathProgramCache]: Analyzing trace with hash -517410441, now seen corresponding path program 74 times [2021-06-05 06:02:12,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:12,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802945029] [2021-06-05 06:02:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:12,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:12,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802945029] [2021-06-05 06:02:12,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802945029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:12,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915198635] [2021-06-05 06:02:12,851 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 06:02:12,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:02:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 82 conjunts are in the unsatisfiable core [2021-06-05 06:02:12,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:13,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915198635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:13,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:13,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 43 [2021-06-05 06:02:13,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431848769] [2021-06-05 06:02:13,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 06:02:13,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:13,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 06:02:13,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:02:13,094 INFO L87 Difference]: Start difference. First operand 216 states and 426 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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 06:02:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:13,225 INFO L93 Difference]: Finished difference Result 3170 states and 6205 transitions. [2021-06-05 06:02:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:02:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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 90 [2021-06-05 06:02:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:13,227 INFO L225 Difference]: With dead ends: 3170 [2021-06-05 06:02:13,227 INFO L226 Difference]: Without dead ends: 3087 [2021-06-05 06:02:13,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:02:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-06-05 06:02:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2841. [2021-06-05 06:02:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 2.040492957746479) internal successors, (5795), 2840 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 5795 transitions. [2021-06-05 06:02:13,255 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 5795 transitions. Word has length 90 [2021-06-05 06:02:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:13,255 INFO L482 AbstractCegarLoop]: Abstraction has 2841 states and 5795 transitions. [2021-06-05 06:02:13,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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 06:02:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 5795 transitions. [2021-06-05 06:02:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-06-05 06:02:13,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:13,257 INFO L521 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:02:13,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 06:02:13,473 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2042819774, now seen corresponding path program 75 times [2021-06-05 06:02:13,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:13,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919980490] [2021-06-05 06:02:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:16,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919980490] [2021-06-05 06:02:16,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919980490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46413381] [2021-06-05 06:02:16,412 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 06:02:16,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-06-05 06:02:16,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 167 conjunts are in the unsatisfiable core [2021-06-05 06:02:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:16,641 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 06:02:16,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:02:16,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:02:16,643 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 06:02:16,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:02:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:16,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46413381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:16,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:16,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-06-05 06:02:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530920480] [2021-06-05 06:02:16,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-06-05 06:02:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:16,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-06-05 06:02:16,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:02:16,649 INFO L87 Difference]: Start difference. First operand 2841 states and 5795 transitions. Second operand has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 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 06:02:22,337 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:02:22,543 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 06:02:22,744 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 06:02:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:27,841 INFO L93 Difference]: Finished difference Result 5759 states and 11425 transitions. [2021-06-05 06:02:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 06:02:27,841 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 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 91 [2021-06-05 06:02:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:27,844 INFO L225 Difference]: With dead ends: 5759 [2021-06-05 06:02:27,844 INFO L226 Difference]: Without dead ends: 3705 [2021-06-05 06:02:27,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 11738.5ms TimeCoverageRelationStatistics Valid=3775, Invalid=23947, Unknown=0, NotChecked=0, Total=27722 [2021-06-05 06:02:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-06-05 06:02:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 221. [2021-06-05 06:02:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.981818181818182) internal successors, (436), 220 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 436 transitions. [2021-06-05 06:02:27,854 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 436 transitions. Word has length 91 [2021-06-05 06:02:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:27,854 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 436 transitions. [2021-06-05 06:02:27,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 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 06:02:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 436 transitions. [2021-06-05 06:02:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-05 06:02:27,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:27,854 INFO L521 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:02:28,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:28,055 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1120167147, now seen corresponding path program 76 times [2021-06-05 06:02:28,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:28,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540296268] [2021-06-05 06:02:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:28,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:28,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540296268] [2021-06-05 06:02:28,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540296268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:28,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991545846] [2021-06-05 06:02:28,753 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 06:02:28,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:02:28,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 84 conjunts are in the unsatisfiable core [2021-06-05 06:02:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:28,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991545846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:28,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:28,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 44 [2021-06-05 06:02:28,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78025983] [2021-06-05 06:02:28,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 06:02:28,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:28,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 06:02:28,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:02:28,982 INFO L87 Difference]: Start difference. First operand 221 states and 436 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:29,123 INFO L93 Difference]: Finished difference Result 3310 states and 6482 transitions. [2021-06-05 06:02:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:02:29,123 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-05 06:02:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:29,126 INFO L225 Difference]: With dead ends: 3310 [2021-06-05 06:02:29,126 INFO L226 Difference]: Without dead ends: 3225 [2021-06-05 06:02:29,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:02:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-06-05 06:02:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2973. [2021-06-05 06:02:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 2.0397039030955586) internal successors, (6062), 2972 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 6062 transitions. [2021-06-05 06:02:29,149 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 6062 transitions. Word has length 92 [2021-06-05 06:02:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:29,149 INFO L482 AbstractCegarLoop]: Abstraction has 2973 states and 6062 transitions. [2021-06-05 06:02:29,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 6062 transitions. [2021-06-05 06:02:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-06-05 06:02:29,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:29,151 INFO L521 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:02:29,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:29,365 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash -214353930, now seen corresponding path program 77 times [2021-06-05 06:02:29,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:29,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301090760] [2021-06-05 06:02:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:32,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301090760] [2021-06-05 06:02:32,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301090760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812294738] [2021-06-05 06:02:32,417 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:32,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-05 06:02:32,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:32,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 171 conjunts are in the unsatisfiable core [2021-06-05 06:02:32,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:32,675 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 06:02:32,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:02:32,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:02:32,678 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 06:02:32,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:02:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:32,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812294738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:32,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:32,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-06-05 06:02:32,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995212888] [2021-06-05 06:02:32,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-06-05 06:02:32,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:32,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-06-05 06:02:32,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 06:02:32,684 INFO L87 Difference]: Start difference. First operand 2973 states and 6062 transitions. Second operand has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 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 06:02:38,691 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 06:02:38,899 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 06:02:39,104 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 06:02:39,333 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 06:02:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:44,447 INFO L93 Difference]: Finished difference Result 6025 states and 11955 transitions. [2021-06-05 06:02:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 06:02:44,448 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 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 93 [2021-06-05 06:02:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:44,451 INFO L225 Difference]: With dead ends: 6025 [2021-06-05 06:02:44,451 INFO L226 Difference]: Without dead ends: 3879 [2021-06-05 06:02:44,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 12332.9ms TimeCoverageRelationStatistics Valid=3951, Invalid=25119, Unknown=0, NotChecked=0, Total=29070 [2021-06-05 06:02:44,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-06-05 06:02:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 226. [2021-06-05 06:02:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 225 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 446 transitions. [2021-06-05 06:02:44,461 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 446 transitions. Word has length 93 [2021-06-05 06:02:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:44,461 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 446 transitions. [2021-06-05 06:02:44,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 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 06:02:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 446 transitions. [2021-06-05 06:02:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-06-05 06:02:44,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:44,461 INFO L521 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:02:44,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 06:02:44,662 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1968033463, now seen corresponding path program 78 times [2021-06-05 06:02:44,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:44,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310565711] [2021-06-05 06:02:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:45,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:45,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310565711] [2021-06-05 06:02:45,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310565711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:45,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032335103] [2021-06-05 06:02:45,422 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:45,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-06-05 06:02:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:02:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2021-06-05 06:02:45,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:45,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032335103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:45,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:45,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 45 [2021-06-05 06:02:45,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61713985] [2021-06-05 06:02:45,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 06:02:45,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 06:02:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:02:45,672 INFO L87 Difference]: Start difference. First operand 226 states and 446 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:45,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:02:45,825 INFO L93 Difference]: Finished difference Result 3453 states and 6765 transitions. [2021-06-05 06:02:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:02:45,825 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-06-05 06:02:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:02:45,827 INFO L225 Difference]: With dead ends: 3453 [2021-06-05 06:02:45,827 INFO L226 Difference]: Without dead ends: 3366 [2021-06-05 06:02:45,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:02:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-06-05 06:02:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3108. [2021-06-05 06:02:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 2.0389443192790475) internal successors, (6335), 3107 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 6335 transitions. [2021-06-05 06:02:45,849 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 6335 transitions. Word has length 94 [2021-06-05 06:02:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:02:45,850 INFO L482 AbstractCegarLoop]: Abstraction has 3108 states and 6335 transitions. [2021-06-05 06:02:45,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 6335 transitions. [2021-06-05 06:02:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 06:02:45,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:02:45,851 INFO L521 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:02:46,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 06:02:46,065 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:02:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:02:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash -606467326, now seen corresponding path program 79 times [2021-06-05 06:02:46,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:02:46,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022812148] [2021-06-05 06:02:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:02:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:49,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:02:49,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022812148] [2021-06-05 06:02:49,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022812148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:49,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339745283] [2021-06-05 06:02:49,244 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:02:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 175 conjunts are in the unsatisfiable core [2021-06-05 06:02:49,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:02:49,465 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 06:02:49,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:02:49,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:02:49,467 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 06:02:49,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:02:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:02:49,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339745283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:02:49,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:02:49,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-06-05 06:02:49,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584522149] [2021-06-05 06:02:49,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-06-05 06:02:49,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:02:49,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-06-05 06:02:49,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 06:02:49,472 INFO L87 Difference]: Start difference. First operand 3108 states and 6335 transitions. Second operand has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:02:55,304 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:02:55,515 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 06:02:55,729 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 06:02:55,947 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 06:02:56,163 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-05 06:02:56,412 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 06:02:56,576 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 06:03:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:01,811 INFO L93 Difference]: Finished difference Result 6297 states and 12497 transitions. [2021-06-05 06:03:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 06:03:01,811 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 06:03:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:01,814 INFO L225 Difference]: With dead ends: 6297 [2021-06-05 06:03:01,814 INFO L226 Difference]: Without dead ends: 4057 [2021-06-05 06:03:01,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 12932.4ms TimeCoverageRelationStatistics Valid=4131, Invalid=26319, Unknown=0, NotChecked=0, Total=30450 [2021-06-05 06:03:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-05 06:03:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 231. [2021-06-05 06:03:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.982608695652174) internal successors, (456), 230 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 456 transitions. [2021-06-05 06:03:01,824 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 456 transitions. Word has length 95 [2021-06-05 06:03:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:01,824 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 456 transitions. [2021-06-05 06:03:01,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 456 transitions. [2021-06-05 06:03:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 06:03:01,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:01,825 INFO L521 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:03:02,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:02,025 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:02,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:02,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1597547221, now seen corresponding path program 80 times [2021-06-05 06:03:02,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:02,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481125223] [2021-06-05 06:03:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:02,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:02,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481125223] [2021-06-05 06:03:02,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481125223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:02,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187752752] [2021-06-05 06:03:02,797 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:02,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:03:02,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 88 conjunts are in the unsatisfiable core [2021-06-05 06:03:02,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:03,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187752752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:03,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:03,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 46 [2021-06-05 06:03:03,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487449191] [2021-06-05 06:03:03,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 06:03:03,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:03,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 06:03:03,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:03:03,032 INFO L87 Difference]: Start difference. First operand 231 states and 456 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:03:03,200 INFO L93 Difference]: Finished difference Result 3599 states and 7054 transitions. [2021-06-05 06:03:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:03:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 06:03:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:03:03,202 INFO L225 Difference]: With dead ends: 3599 [2021-06-05 06:03:03,202 INFO L226 Difference]: Without dead ends: 3510 [2021-06-05 06:03:03,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:03:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-06-05 06:03:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3246. [2021-06-05 06:03:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3246 states, 3245 states have (on average 2.0382126348228042) internal successors, (6614), 3245 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 6614 transitions. [2021-06-05 06:03:03,224 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 6614 transitions. Word has length 96 [2021-06-05 06:03:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:03:03,224 INFO L482 AbstractCegarLoop]: Abstraction has 3246 states and 6614 transitions. [2021-06-05 06:03:03,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 6614 transitions. [2021-06-05 06:03:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-06-05 06:03:03,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:03:03,226 INFO L521 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:03:03,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:03,426 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:03:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:03:03,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1791642954, now seen corresponding path program 81 times [2021-06-05 06:03:03,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:03:03,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241425219] [2021-06-05 06:03:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:03:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:03:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:06,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:03:06,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241425219] [2021-06-05 06:03:06,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241425219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:06,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340343572] [2021-06-05 06:03:06,730 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:03:06,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-05 06:03:06,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:03:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 94 conjunts are in the unsatisfiable core [2021-06-05 06:03:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:03:16,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:03:16,636 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:03:16,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:03:16,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:03:16,641 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 06:03:16,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 06:03:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 946 proven. 1034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:03:16,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340343572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:03:16,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:03:16,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 178 [2021-06-05 06:03:16,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619310696] [2021-06-05 06:03:16,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 179 states [2021-06-05 06:03:16,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:03:16,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-06-05 06:03:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4183, Invalid=27679, Unknown=0, NotChecked=0, Total=31862 [2021-06-05 06:03:16,648 INFO L87 Difference]: Start difference. First operand 3246 states and 6614 transitions. Second operand has 179 states, 179 states have (on average 1.0558659217877095) internal successors, (189), 178 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:03:20,897 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-05 06:03:21,152 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-05 06:03:21,418 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-05 06:03:21,682 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-06-05 06:03:21,965 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-06-05 06:03:22,250 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2021-06-05 06:03:22,551 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-06-05 06:03:22,849 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-06-05 06:03:23,167 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-05 06:03:23,489 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-05 06:03:23,831 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-06-05 06:03:24,162 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 144 [2021-06-05 06:03:24,520 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-06-05 06:03:24,886 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2021-06-05 06:03:25,255 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-06-05 06:03:25,627 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-05 06:03:26,010 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 164 [2021-06-05 06:03:26,418 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 173 [2021-06-05 06:03:26,834 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 177 [2021-06-05 06:03:27,250 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 176 [2021-06-05 06:03:27,679 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 180 [2021-06-05 06:03:27,990 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2021-06-05 06:03:28,304 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-06-05 06:03:28,604 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-06-05 06:03:28,856 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-05 06:03:29,122 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2021-06-05 06:03:29,366 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-06-05 06:03:29,598 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 06:03:29,850 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-05 06:03:30,098 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 06:03:30,581 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-05 06:03:30,826 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 06:03:31,072 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 06:03:31,556 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 06:03:31,794 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 06:03:32,035 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 06:03:32,525 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 06:03:32,785 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 06:03:33,021 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 06:03:33,255 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 06:03:33,742 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 06:03:33,984 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 06:03:34,214 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:03:34,934 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 06:03:35,185 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 06:03:35,427 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:03:36,367 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 06:03:36,625 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:03:37,799 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 06:03:38,057 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:03:39,442 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:03:41,073 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 06:06:35,177 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-05 06:06:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2021-06-05 06:06:35,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:35,379 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:860) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:774) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-06-05 06:06:35,382 INFO L168 Benchmark]: Toolchain (without parser) took 766690.77 ms. Allocated memory was 379.6 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 359.2 MB in the beginning and 530.0 MB in the end (delta: -170.8 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-06-05 06:06:35,382 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 379.6 MB. Free memory is still 360.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:06:35,382 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.87 ms. Allocated memory is still 379.6 MB. Free memory was 359.1 MB in the beginning and 357.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:06:35,382 INFO L168 Benchmark]: Boogie Preprocessor took 9.54 ms. Allocated memory is still 379.6 MB. Free memory was 357.6 MB in the beginning and 356.7 MB in the end (delta: 835.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:06:35,382 INFO L168 Benchmark]: RCFGBuilder took 160.59 ms. Allocated memory is still 379.6 MB. Free memory was 356.6 MB in the beginning and 345.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:06:35,382 INFO L168 Benchmark]: TraceAbstraction took 766499.46 ms. Allocated memory was 379.6 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 345.2 MB in the beginning and 530.0 MB in the end (delta: -184.8 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-06-05 06:06:35,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 379.6 MB. Free memory is still 360.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.87 ms. Allocated memory is still 379.6 MB. Free memory was 359.1 MB in the beginning and 357.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.54 ms. Allocated memory is still 379.6 MB. Free memory was 357.6 MB in the beginning and 356.7 MB in the end (delta: 835.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 160.59 ms. Allocated memory is still 379.6 MB. Free memory was 356.6 MB in the beginning and 345.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 766499.46 ms. Allocated memory was 379.6 MB in the beginning and 1.6 GB in the end (delta: 1.3 GB). Free memory was 345.2 MB in the beginning and 530.0 MB in the end (delta: -184.8 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...