/usr/bin/java -Xmx8000000000 -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/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:05:56,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:05:56,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:05:56,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:05:56,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:05:56,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:05:56,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:05:56,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:05:56,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:05:56,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:05:56,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:05:56,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:05:56,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:05:56,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:05:56,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:05:56,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:05:56,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:05:56,158 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 [2021-07-13 20:05:56,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:05:56,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:05:56,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:05:56,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:05:56,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:05:56,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:05:56,189 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:05:56,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:05:56,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:05:56,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:05:56,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:05:56,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:05:56,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:05:56,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:05:56,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:05:56,191 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:05:56,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:05:56,191 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:05:56,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:05:56,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:05:56,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:05:56,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:05:56,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:05:56,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:05:56,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:05:56,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:05:56,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:05:56,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:05:56,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:05:56,192 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:05:56,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:05:56,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:05:56,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:05:56,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:05:56,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:05:56,458 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:05:56,459 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:05:56,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-07-13 20:05:56,460 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-07-13 20:05:56,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:05:56,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:05:56,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:05:56,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:05:56,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:05:56,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:05:56,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:05:56,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:05:56,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:05:56,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/1) ... [2021-07-13 20:05:56,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:05:56,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:05:56,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:05:56,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:05:56,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (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 [2021-07-13 20:05:56,583 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:05:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:05:56,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:05:56,584 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:05:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:05:56,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:05:56,584 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:05:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:05:56,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:05:56,585 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:05:56,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:05:56,717 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:05:56,718 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:05:56 BoogieIcfgContainer [2021-07-13 20:05:56,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:05:56,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:05:56,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:05:56,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:05:56,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:05:56" (1/2) ... [2021-07-13 20:05:56,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f64ee8e and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:05:56, skipping insertion in model container [2021-07-13 20:05:56,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:05:56" (2/2) ... [2021-07-13 20:05:56,724 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-07-13 20:05:56,727 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:05:56,727 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:05:56,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:05:56,728 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:05:56,770 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:05:56,785 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:05:56,798 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:05:56,798 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:05:56,798 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:05:56,798 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:05:56,798 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:05:56,798 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:05:56,798 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:05:56,798 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:05:56,804 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-07-13 20:05:56,813 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2021-07-13 20:05:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) [2021-07-13 20:05:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:05:56,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:56,818 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:56,818 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:56,822 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-07-13 20:05:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:56,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156077076] [2021-07-13 20:05:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:56,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:56,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156077076] [2021-07-13 20:05:56,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156077076] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:05:56,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:05:56,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:05:56,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171449582] [2021-07-13 20:05:56,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:05:56,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:56,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:05:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:05:56,937 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 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) Second operand has 4 states, 4 states have (on average 3.75) 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) [2021-07-13 20:05:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:57,004 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-07-13 20:05:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:05:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 15 [2021-07-13 20:05:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:57,011 INFO L225 Difference]: With dead ends: 43 [2021-07-13 20:05:57,011 INFO L226 Difference]: Without dead ends: 43 [2021-07-13 20:05:57,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:05:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-13 20:05:57,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-07-13 20:05:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2021-07-13 20:05:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-07-13 20:05:57,039 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-07-13 20:05:57,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:57,039 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-07-13 20:05:57,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) 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) [2021-07-13 20:05:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-07-13 20:05:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:05:57,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:57,040 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:57,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:05:57,040 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-07-13 20:05:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:57,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551825017] [2021-07-13 20:05:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:05:57,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:57,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551825017] [2021-07-13 20:05:57,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551825017] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:05:57,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:05:57,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:05:57,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164171055] [2021-07-13 20:05:57,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:05:57,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:57,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:05:57,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:05:57,087 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-07-13 20:05:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:57,112 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-07-13 20:05:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:05:57,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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 [2021-07-13 20:05:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:57,114 INFO L225 Difference]: With dead ends: 50 [2021-07-13 20:05:57,114 INFO L226 Difference]: Without dead ends: 50 [2021-07-13 20:05:57,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-13 20:05:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-07-13 20:05:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 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) [2021-07-13 20:05:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-07-13 20:05:57,120 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-07-13 20:05:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:57,120 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-07-13 20:05:57,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 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) [2021-07-13 20:05:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-07-13 20:05:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:05:57,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:57,121 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:57,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:05:57,121 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:57,122 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-07-13 20:05:57,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:57,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864611338] [2021-07-13 20:05:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:57,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:57,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864611338] [2021-07-13 20:05:57,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864611338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:57,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395259353] [2021-07-13 20:05:57,186 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) [2021-07-13 20:05:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:05:57,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:57,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395259353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:57,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:57,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 20:05:57,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49989381] [2021-07-13 20:05:57,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:05:57,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:57,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:05:57,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:05:57,407 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:57,437 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-07-13 20:05:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:05:57,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:05:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:57,438 INFO L225 Difference]: With dead ends: 99 [2021-07-13 20:05:57,438 INFO L226 Difference]: Without dead ends: 78 [2021-07-13 20:05:57,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:05:57,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-13 20:05:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-07-13 20:05:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:57,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-07-13 20:05:57,447 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-07-13 20:05:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:57,447 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-07-13 20:05:57,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-07-13 20:05:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:05:57,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:57,448 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:57,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:05:57,664 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-07-13 20:05:57,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:57,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129539949] [2021-07-13 20:05:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:57,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:57,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129539949] [2021-07-13 20:05:57,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129539949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:57,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411735477] [2021-07-13 20:05:57,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:05:57,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:57,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:05:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:57,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411735477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:57,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:57,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:05:57,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433090911] [2021-07-13 20:05:57,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:05:57,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:57,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:05:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:05:57,852 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-07-13 20:05:57,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:57,879 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-07-13 20:05:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:05:57,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:05:57,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:57,883 INFO L225 Difference]: With dead ends: 80 [2021-07-13 20:05:57,883 INFO L226 Difference]: Without dead ends: 77 [2021-07-13 20:05:57,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:05:57,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-13 20:05:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-07-13 20:05:57,895 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) [2021-07-13 20:05:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-07-13 20:05:57,898 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-07-13 20:05:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:57,898 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-07-13 20:05:57,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-07-13 20:05:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-07-13 20:05:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:57,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:57,900 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:58,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:58,122 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:58,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-07-13 20:05:58,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:58,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525564298] [2021-07-13 20:05:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:58,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:58,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525564298] [2021-07-13 20:05:58,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525564298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:58,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633196765] [2021-07-13 20:05:58,209 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 [2021-07-13 20:05:58,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:58,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:58,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:05:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:58,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633196765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:58,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:58,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:05:58,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815552064] [2021-07-13 20:05:58,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:05:58,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:58,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:05:58,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:05:58,403 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-07-13 20:05:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:58,680 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-07-13 20:05:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:05:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21 [2021-07-13 20:05:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:58,683 INFO L225 Difference]: With dead ends: 198 [2021-07-13 20:05:58,684 INFO L226 Difference]: Without dead ends: 192 [2021-07-13 20:05:58,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:05:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-13 20:05:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-07-13 20:05:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-07-13 20:05:58,703 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-07-13 20:05:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:58,703 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-07-13 20:05:58,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-07-13 20:05:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-07-13 20:05:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:58,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:58,704 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:58,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:58,909 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-07-13 20:05:58,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:58,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950135256] [2021-07-13 20:05:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:58,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:58,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950135256] [2021-07-13 20:05:58,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950135256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:58,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519968856] [2021-07-13 20:05:58,950 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 [2021-07-13 20:05:58,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:58,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:05:58,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:59,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519968856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:59,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:59,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-07-13 20:05:59,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10451626] [2021-07-13 20:05:59,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:05:59,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:59,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:05:59,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:05:59,100 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-13 20:05:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:59,342 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-07-13 20:05:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:05:59,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 21 [2021-07-13 20:05:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:59,343 INFO L225 Difference]: With dead ends: 170 [2021-07-13 20:05:59,343 INFO L226 Difference]: Without dead ends: 166 [2021-07-13 20:05:59,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:05:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-13 20:05:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-07-13 20:05:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-07-13 20:05:59,352 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-07-13 20:05:59,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:59,352 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-07-13 20:05:59,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-13 20:05:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-07-13 20:05:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:59,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:59,356 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:59,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:59,573 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-07-13 20:05:59,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:59,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455124921] [2021-07-13 20:05:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:59,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455124921] [2021-07-13 20:05:59,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455124921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879010260] [2021-07-13 20:05:59,644 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 [2021-07-13 20:05:59,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:59,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:05:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:59,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879010260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:59,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:59,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:05:59,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442888787] [2021-07-13 20:05:59,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:05:59,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:59,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:05:59,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:59,732 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:59,749 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-07-13 20:05:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:05:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:05:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:59,750 INFO L225 Difference]: With dead ends: 190 [2021-07-13 20:05:59,750 INFO L226 Difference]: Without dead ends: 163 [2021-07-13 20:05:59,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:05:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-13 20:05:59,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-07-13 20:05:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-07-13 20:05:59,757 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-07-13 20:05:59,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:59,757 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-07-13 20:05:59,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-07-13 20:05:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:59,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:59,758 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:59,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:59,973 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:59,973 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-07-13 20:05:59,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:59,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560390072] [2021-07-13 20:05:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:00,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:00,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560390072] [2021-07-13 20:06:00,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560390072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:00,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692778607] [2021-07-13 20:06:00,082 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 [2021-07-13 20:06:00,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:06:00,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:00,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:06:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:00,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692778607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:00,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:00,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 20:06:00,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389508247] [2021-07-13 20:06:00,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:06:00,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:00,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:06:00,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:06:00,266 INFO L87 Difference]: Start difference. First operand 120 states and 248 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) [2021-07-13 20:06:00,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:00,732 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-07-13 20:06:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:06:00,737 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 23 [2021-07-13 20:06:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:00,741 INFO L225 Difference]: With dead ends: 320 [2021-07-13 20:06:00,741 INFO L226 Difference]: Without dead ends: 302 [2021-07-13 20:06:00,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:06:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-13 20:06:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-07-13 20:06:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-07-13 20:06:00,747 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-07-13 20:06:00,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:00,747 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-07-13 20:06:00,747 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) [2021-07-13 20:06:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-07-13 20:06:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:00,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:00,748 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:00,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:00,961 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:00,961 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-07-13 20:06:00,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:00,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345131748] [2021-07-13 20:06:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:01,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:01,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345131748] [2021-07-13 20:06:01,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345131748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:01,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670061183] [2021-07-13 20:06:01,028 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 [2021-07-13 20:06:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:01,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:06:01,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:01,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670061183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:01,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:01,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:06:01,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186500547] [2021-07-13 20:06:01,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:06:01,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:06:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:06:01,188 INFO L87 Difference]: Start difference. First operand 141 states and 293 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) [2021-07-13 20:06:01,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:01,491 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-07-13 20:06:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:06:01,492 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 23 [2021-07-13 20:06:01,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:01,494 INFO L225 Difference]: With dead ends: 321 [2021-07-13 20:06:01,494 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 20:06:01,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:06:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 20:06:01,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-07-13 20:06:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-07-13 20:06:01,500 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-07-13 20:06:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:01,500 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-07-13 20:06:01,500 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) [2021-07-13 20:06:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-07-13 20:06:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:01,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:01,502 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:01,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:06:01,717 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:01,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-07-13 20:06:01,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:01,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349819992] [2021-07-13 20:06:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:01,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:01,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349819992] [2021-07-13 20:06:01,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349819992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:01,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409300419] [2021-07-13 20:06:01,778 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) [2021-07-13 20:06:01,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:01,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:01,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:06:01,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:01,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409300419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:01,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:01,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:06:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869142350] [2021-07-13 20:06:01,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:06:01,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:01,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:06:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:06:01,990 INFO L87 Difference]: Start difference. First operand 173 states and 374 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) [2021-07-13 20:06:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:02,453 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-07-13 20:06:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:06:02,454 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 25 [2021-07-13 20:06:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:02,455 INFO L225 Difference]: With dead ends: 435 [2021-07-13 20:06:02,455 INFO L226 Difference]: Without dead ends: 417 [2021-07-13 20:06:02,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:06:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-13 20:06:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-07-13 20:06:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-07-13 20:06:02,460 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-07-13 20:06:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:02,460 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-07-13 20:06:02,460 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) [2021-07-13 20:06:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-07-13 20:06:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:06:02,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:02,461 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:02,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 20:06:02,673 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-07-13 20:06:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:02,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852830999] [2021-07-13 20:06:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:02,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:02,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852830999] [2021-07-13 20:06:02,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852830999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:02,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153918287] [2021-07-13 20:06:02,720 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 [2021-07-13 20:06:02,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:06:02,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:06:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:02,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153918287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:02,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:02,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-07-13 20:06:02,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697810441] [2021-07-13 20:06:02,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:06:02,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:02,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:06:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:06:02,893 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-07-13 20:06:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:03,307 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-07-13 20:06:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:06:03,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-07-13 20:06:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:03,308 INFO L225 Difference]: With dead ends: 340 [2021-07-13 20:06:03,308 INFO L226 Difference]: Without dead ends: 336 [2021-07-13 20:06:03,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:06:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-13 20:06:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-07-13 20:06:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-07-13 20:06:03,313 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-07-13 20:06:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:03,313 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-07-13 20:06:03,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-07-13 20:06:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-07-13 20:06:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:03,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:03,314 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:03,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:03,530 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:03,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:03,530 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-07-13 20:06:03,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:03,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529596917] [2021-07-13 20:06:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:03,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:03,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529596917] [2021-07-13 20:06:03,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529596917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:03,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000912669] [2021-07-13 20:06:03,595 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) [2021-07-13 20:06:03,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:03,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:03,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:06:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:03,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000912669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:03,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:03,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 20:06:03,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020856785] [2021-07-13 20:06:03,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:06:03,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:03,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:06:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:03,681 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-07-13 20:06:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:03,706 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-07-13 20:06:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:06:03,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:03,707 INFO L225 Difference]: With dead ends: 354 [2021-07-13 20:06:03,707 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 20:06:03,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:06:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 20:06:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-07-13 20:06:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-07-13 20:06:03,712 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-07-13 20:06:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:03,712 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-07-13 20:06:03,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-07-13 20:06:03,713 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-07-13 20:06:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:03,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:03,713 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:03,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:03,932 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:03,932 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-07-13 20:06:03,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:03,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139463633] [2021-07-13 20:06:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:04,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:04,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139463633] [2021-07-13 20:06:04,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139463633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:04,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655195157] [2021-07-13 20:06:04,055 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 [2021-07-13 20:06:04,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:06:04,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:06:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:04,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655195157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:04,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:04,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:06:04,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119516638] [2021-07-13 20:06:04,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:06:04,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:04,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:06:04,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:06:04,257 INFO L87 Difference]: Start difference. First operand 242 states and 531 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) [2021-07-13 20:06:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:04,937 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-07-13 20:06:04,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:06:04,938 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 27 [2021-07-13 20:06:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:04,940 INFO L225 Difference]: With dead ends: 559 [2021-07-13 20:06:04,940 INFO L226 Difference]: Without dead ends: 553 [2021-07-13 20:06:04,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:06:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-13 20:06:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-07-13 20:06:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-07-13 20:06:04,946 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-07-13 20:06:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:04,946 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-07-13 20:06:04,946 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) [2021-07-13 20:06:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-07-13 20:06:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:04,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:04,947 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:05,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:06:05,155 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:05,155 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-07-13 20:06:05,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:05,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336053774] [2021-07-13 20:06:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:05,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:05,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336053774] [2021-07-13 20:06:05,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336053774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:05,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421287981] [2021-07-13 20:06:05,237 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 [2021-07-13 20:06:05,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:06:05,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:06:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:05,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421287981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:05,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:05,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:06:05,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260579250] [2021-07-13 20:06:05,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:06:05,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:06:05,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:06:05,446 INFO L87 Difference]: Start difference. First operand 234 states and 514 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) [2021-07-13 20:06:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:06,086 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-07-13 20:06:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:06:06,086 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 27 [2021-07-13 20:06:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:06,090 INFO L225 Difference]: With dead ends: 976 [2021-07-13 20:06:06,090 INFO L226 Difference]: Without dead ends: 940 [2021-07-13 20:06:06,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:06:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-07-13 20:06:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-07-13 20:06:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-07-13 20:06:06,102 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-07-13 20:06:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:06,103 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-07-13 20:06:06,103 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) [2021-07-13 20:06:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-07-13 20:06:06,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:06,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:06,104 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:06,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:06:06,309 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-07-13 20:06:06,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:06,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090398381] [2021-07-13 20:06:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:06,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:06,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090398381] [2021-07-13 20:06:06,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090398381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:06,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108439024] [2021-07-13 20:06:06,378 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 [2021-07-13 20:06:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:06:06,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:06,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108439024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:06,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:06,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 20:06:06,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286897261] [2021-07-13 20:06:06,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:06:06,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:06,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:06:06,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:06:06,622 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:07,348 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-07-13 20:06:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:06:07,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:06:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:07,350 INFO L225 Difference]: With dead ends: 802 [2021-07-13 20:06:07,351 INFO L226 Difference]: Without dead ends: 794 [2021-07-13 20:06:07,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:06:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-07-13 20:06:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-07-13 20:06:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-07-13 20:06:07,359 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-07-13 20:06:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:07,359 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-07-13 20:06:07,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-07-13 20:06:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:07,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:07,360 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:07,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:06:07,573 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-07-13 20:06:07,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:07,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169916405] [2021-07-13 20:06:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:07,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:07,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169916405] [2021-07-13 20:06:07,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169916405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:07,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037995035] [2021-07-13 20:06:07,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:06:07,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:07,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:06:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:07,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037995035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:07,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:07,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:06:07,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950853563] [2021-07-13 20:06:07,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:07,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:07,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:07,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:07,902 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:08,673 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-07-13 20:06:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:06:08,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:08,676 INFO L225 Difference]: With dead ends: 680 [2021-07-13 20:06:08,676 INFO L226 Difference]: Without dead ends: 638 [2021-07-13 20:06:08,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:06:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-07-13 20:06:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-07-13 20:06:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-07-13 20:06:08,683 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-07-13 20:06:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:08,683 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-07-13 20:06:08,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-07-13 20:06:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:08,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:08,683 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:08,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:08,901 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-07-13 20:06:08,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:08,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840870502] [2021-07-13 20:06:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:08,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:08,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840870502] [2021-07-13 20:06:08,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840870502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:08,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075542025] [2021-07-13 20:06:08,946 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 [2021-07-13 20:06:08,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:06:08,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:06:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:09,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075542025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:09,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:09,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-07-13 20:06:09,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215708033] [2021-07-13 20:06:09,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:06:09,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:09,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:06:09,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:06:09,160 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:09,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:09,875 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-07-13 20:06:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:06:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:09,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:09,877 INFO L225 Difference]: With dead ends: 520 [2021-07-13 20:06:09,877 INFO L226 Difference]: Without dead ends: 516 [2021-07-13 20:06:09,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:06:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-07-13 20:06:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-07-13 20:06:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-07-13 20:06:09,883 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-07-13 20:06:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:09,883 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-07-13 20:06:09,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-07-13 20:06:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:09,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:09,883 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:10,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:10,097 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-07-13 20:06:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:10,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280161403] [2021-07-13 20:06:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:10,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:10,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280161403] [2021-07-13 20:06:10,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280161403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:10,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702641371] [2021-07-13 20:06:10,154 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 [2021-07-13 20:06:10,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:10,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:06:10,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:10,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702641371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:10,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:10,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 20:06:10,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839297378] [2021-07-13 20:06:10,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:06:10,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:06:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:10,228 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:10,267 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-07-13 20:06:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:06:10,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:10,269 INFO L225 Difference]: With dead ends: 492 [2021-07-13 20:06:10,269 INFO L226 Difference]: Without dead ends: 453 [2021-07-13 20:06:10,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-13 20:06:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-07-13 20:06:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-07-13 20:06:10,276 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-07-13 20:06:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:10,276 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-07-13 20:06:10,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-07-13 20:06:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:10,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:10,277 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:10,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:10,494 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:10,494 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-07-13 20:06:10,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:10,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453000093] [2021-07-13 20:06:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:10,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453000093] [2021-07-13 20:06:10,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453000093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788332446] [2021-07-13 20:06:10,616 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 [2021-07-13 20:06:10,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:06:10,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:06:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:10,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788332446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:10,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:10,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-13 20:06:10,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582607566] [2021-07-13 20:06:10,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:10,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:10,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:10,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:10,877 INFO L87 Difference]: Start difference. First operand 337 states and 734 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) [2021-07-13 20:06:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:11,869 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-07-13 20:06:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:06:11,869 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 31 [2021-07-13 20:06:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:11,871 INFO L225 Difference]: With dead ends: 772 [2021-07-13 20:06:11,871 INFO L226 Difference]: Without dead ends: 766 [2021-07-13 20:06:11,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 875.6ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:06:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-07-13 20:06:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-07-13 20:06:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-07-13 20:06:11,879 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-07-13 20:06:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:11,879 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-07-13 20:06:11,879 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) [2021-07-13 20:06:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-07-13 20:06:11,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:11,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:11,879 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:12,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:06:12,092 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-07-13 20:06:12,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:12,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588275229] [2021-07-13 20:06:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:12,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:12,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588275229] [2021-07-13 20:06:12,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588275229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:12,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485269844] [2021-07-13 20:06:12,190 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 [2021-07-13 20:06:12,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:06:12,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:12,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:12,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:12,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485269844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:12,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:12,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:06:12,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259418288] [2021-07-13 20:06:12,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:06:12,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:12,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:06:12,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:06:12,440 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:13,501 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-07-13 20:06:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:06:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:13,506 INFO L225 Difference]: With dead ends: 1342 [2021-07-13 20:06:13,506 INFO L226 Difference]: Without dead ends: 1318 [2021-07-13 20:06:13,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 890.1ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:06:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-07-13 20:06:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-07-13 20:06:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-07-13 20:06:13,517 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-07-13 20:06:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:13,517 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-07-13 20:06:13,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-07-13 20:06:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:13,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:13,518 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:13,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:06:13,725 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-07-13 20:06:13,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:13,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313853342] [2021-07-13 20:06:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:13,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:13,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313853342] [2021-07-13 20:06:13,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313853342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:13,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067408019] [2021-07-13 20:06:13,809 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 [2021-07-13 20:06:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:14,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067408019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:14,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:14,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-13 20:06:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380405332] [2021-07-13 20:06:14,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:14,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:14,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:14,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:14,094 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:15,112 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-07-13 20:06:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:06:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:06:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:15,115 INFO L225 Difference]: With dead ends: 1094 [2021-07-13 20:06:15,115 INFO L226 Difference]: Without dead ends: 1090 [2021-07-13 20:06:15,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 888.8ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:06:15,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-07-13 20:06:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-07-13 20:06:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-07-13 20:06:15,124 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-07-13 20:06:15,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:15,124 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-07-13 20:06:15,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-07-13 20:06:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:15,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:15,129 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:15,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:06:15,349 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-07-13 20:06:15,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:15,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725447965] [2021-07-13 20:06:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:15,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725447965] [2021-07-13 20:06:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725447965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089393475] [2021-07-13 20:06:15,445 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 [2021-07-13 20:06:15,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:15,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:06:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:15,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089393475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:15,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:15,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-13 20:06:15,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482064869] [2021-07-13 20:06:15,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:15,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:15,712 INFO L87 Difference]: Start difference. First operand 333 states and 737 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) [2021-07-13 20:06:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:16,511 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-07-13 20:06:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:06:16,512 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 31 [2021-07-13 20:06:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:16,516 INFO L225 Difference]: With dead ends: 1727 [2021-07-13 20:06:16,516 INFO L226 Difference]: Without dead ends: 1631 [2021-07-13 20:06:16,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 756.0ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:06:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-07-13 20:06:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-07-13 20:06:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-07-13 20:06:16,527 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-07-13 20:06:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:16,527 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-07-13 20:06:16,527 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) [2021-07-13 20:06:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-07-13 20:06:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:16,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:16,528 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:16,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:06:16,741 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-07-13 20:06:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:16,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163713080] [2021-07-13 20:06:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:16,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:16,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163713080] [2021-07-13 20:06:16,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163713080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:16,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887600328] [2021-07-13 20:06:16,817 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 [2021-07-13 20:06:16,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:06:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:06:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:17,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887600328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:17,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:17,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-13 20:06:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953968128] [2021-07-13 20:06:17,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:17,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:17,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:17,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:17,048 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-07-13 20:06:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:18,136 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-07-13 20:06:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:06:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 31 [2021-07-13 20:06:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:18,140 INFO L225 Difference]: With dead ends: 1314 [2021-07-13 20:06:18,140 INFO L226 Difference]: Without dead ends: 1310 [2021-07-13 20:06:18,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 997.7ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:06:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-07-13 20:06:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-07-13 20:06:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-07-13 20:06:18,152 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-07-13 20:06:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:18,152 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-07-13 20:06:18,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-07-13 20:06:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-07-13 20:06:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:06:18,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:18,153 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:18,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:18,354 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:18,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-07-13 20:06:18,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:18,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285858883] [2021-07-13 20:06:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:18,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:18,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285858883] [2021-07-13 20:06:18,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285858883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:18,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762528968] [2021-07-13 20:06:18,455 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 [2021-07-13 20:06:18,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:18,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:18,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:18,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762528968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:18,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:18,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:06:18,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18379719] [2021-07-13 20:06:18,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:06:18,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:06:18,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:06:18,751 INFO L87 Difference]: Start difference. First operand 563 states and 1301 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) [2021-07-13 20:06:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:19,739 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-07-13 20:06:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:06:19,739 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 33 [2021-07-13 20:06:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:19,742 INFO L225 Difference]: With dead ends: 1171 [2021-07-13 20:06:19,742 INFO L226 Difference]: Without dead ends: 1099 [2021-07-13 20:06:19,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 964.3ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:06:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-13 20:06:19,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-07-13 20:06:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-07-13 20:06:19,762 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-07-13 20:06:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:19,762 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-07-13 20:06:19,762 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) [2021-07-13 20:06:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-07-13 20:06:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:06:19,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:19,763 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:19,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:19,977 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:19,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:19,977 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-07-13 20:06:19,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:19,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004880804] [2021-07-13 20:06:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:20,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:20,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004880804] [2021-07-13 20:06:20,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004880804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:20,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103196468] [2021-07-13 20:06:20,039 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 [2021-07-13 20:06:20,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:06:20,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:06:20,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:20,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103196468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:20,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:20,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-07-13 20:06:20,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234270954] [2021-07-13 20:06:20,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:06:20,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:20,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:06:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:06:20,304 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2021-07-13 20:06:21,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:21,290 INFO L93 Difference]: Finished difference Result 940 states and 2022 transitions. [2021-07-13 20:06:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:06:21,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 33 [2021-07-13 20:06:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:21,293 INFO L225 Difference]: With dead ends: 940 [2021-07-13 20:06:21,293 INFO L226 Difference]: Without dead ends: 936 [2021-07-13 20:06:21,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 920.4ms TimeCoverageRelationStatistics Valid=1104, Invalid=3452, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:06:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-07-13 20:06:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 572. [2021-07-13 20:06:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-07-13 20:06:21,302 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-07-13 20:06:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:21,302 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-07-13 20:06:21,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2021-07-13 20:06:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-07-13 20:06:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:06:21,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:21,303 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:21,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:06:21,517 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:21,517 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-07-13 20:06:21,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:21,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252627546] [2021-07-13 20:06:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:21,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:21,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252627546] [2021-07-13 20:06:21,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252627546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163992563] [2021-07-13 20:06:21,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:06:21,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:06:21,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:21,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:06:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:21,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163992563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:21,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-07-13 20:06:21,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707440919] [2021-07-13 20:06:21,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:06:21,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:21,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:06:21,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:06:21,716 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:21,852 INFO L93 Difference]: Finished difference Result 950 states and 2099 transitions. [2021-07-13 20:06:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:06:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:06:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:21,855 INFO L225 Difference]: With dead ends: 950 [2021-07-13 20:06:21,855 INFO L226 Difference]: Without dead ends: 896 [2021-07-13 20:06:21,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:06:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-07-13 20:06:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-07-13 20:06:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.336099585062241) internal successors, (1689), 723 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-07-13 20:06:21,878 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-07-13 20:06:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:21,878 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-07-13 20:06:21,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-07-13 20:06:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:06:21,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:21,880 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:22,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:22,089 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 25 times [2021-07-13 20:06:22,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:22,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410052585] [2021-07-13 20:06:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:22,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:22,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410052585] [2021-07-13 20:06:22,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410052585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:22,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302332055] [2021-07-13 20:06:22,200 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 [2021-07-13 20:06:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:06:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:22,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302332055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:22,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:22,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:06:22,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259064666] [2021-07-13 20:06:22,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:06:22,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:06:22,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:06:22,511 INFO L87 Difference]: Start difference. First operand 724 states and 1689 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) [2021-07-13 20:06:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:24,114 INFO L93 Difference]: Finished difference Result 2174 states and 4585 transitions. [2021-07-13 20:06:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:06:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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 35 [2021-07-13 20:06:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:24,130 INFO L225 Difference]: With dead ends: 2174 [2021-07-13 20:06:24,130 INFO L226 Difference]: Without dead ends: 2150 [2021-07-13 20:06:24,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1222.5ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:06:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-07-13 20:06:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 800. [2021-07-13 20:06:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3617021276595747) internal successors, (1887), 799 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1887 transitions. [2021-07-13 20:06:24,146 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1887 transitions. Word has length 35 [2021-07-13 20:06:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:24,146 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1887 transitions. [2021-07-13 20:06:24,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 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) [2021-07-13 20:06:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1887 transitions. [2021-07-13 20:06:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:06:24,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:24,147 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:24,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:06:24,359 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:24,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 26 times [2021-07-13 20:06:24,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:24,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082267782] [2021-07-13 20:06:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:24,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082267782] [2021-07-13 20:06:24,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082267782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:24,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569868464] [2021-07-13 20:06:24,454 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 [2021-07-13 20:06:24,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:24,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:06:24,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:24,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569868464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:24,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:24,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-13 20:06:24,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089014098] [2021-07-13 20:06:24,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:24,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:24,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:24,769 INFO L87 Difference]: Start difference. First operand 800 states and 1887 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 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) [2021-07-13 20:06:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:26,146 INFO L93 Difference]: Finished difference Result 1787 states and 3872 transitions. [2021-07-13 20:06:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:06:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 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 35 [2021-07-13 20:06:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:26,151 INFO L225 Difference]: With dead ends: 1787 [2021-07-13 20:06:26,151 INFO L226 Difference]: Without dead ends: 1783 [2021-07-13 20:06:26,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1147.6ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:06:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-07-13 20:06:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 712. [2021-07-13 20:06:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-07-13 20:06:26,165 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-07-13 20:06:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:26,165 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-07-13 20:06:26,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 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) [2021-07-13 20:06:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-07-13 20:06:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:06:26,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:26,167 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:26,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:26,383 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:26,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 27 times [2021-07-13 20:06:26,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:26,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113749086] [2021-07-13 20:06:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:26,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:26,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113749086] [2021-07-13 20:06:26,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113749086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:26,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496335388] [2021-07-13 20:06:26,505 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 [2021-07-13 20:06:26,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:06:26,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:26,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:06:26,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:26,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496335388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:26,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:26,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:06:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565976503] [2021-07-13 20:06:26,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:06:26,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:06:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:06:26,806 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2021-07-13 20:06:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:28,323 INFO L93 Difference]: Finished difference Result 2749 states and 5737 transitions. [2021-07-13 20:06:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:06:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 35 [2021-07-13 20:06:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:28,331 INFO L225 Difference]: With dead ends: 2749 [2021-07-13 20:06:28,331 INFO L226 Difference]: Without dead ends: 2653 [2021-07-13 20:06:28,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1239.1ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:06:28,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-07-13 20:06:28,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 712. [2021-07-13 20:06:28,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-07-13 20:06:28,348 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-07-13 20:06:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:28,348 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-07-13 20:06:28,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2021-07-13 20:06:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-07-13 20:06:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:06:28,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:28,350 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:28,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 20:06:28,561 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:28,562 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 28 times [2021-07-13 20:06:28,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:28,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085160685] [2021-07-13 20:06:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:28,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085160685] [2021-07-13 20:06:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085160685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868596414] [2021-07-13 20:06:28,671 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 [2021-07-13 20:06:28,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:28,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:28,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:06:28,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:28,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868596414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:28,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:28,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-13 20:06:28,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832140373] [2021-07-13 20:06:28,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:06:28,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:28,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:06:28,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:06:28,986 INFO L87 Difference]: Start difference. First operand 712 states and 1674 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) [2021-07-13 20:06:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:30,172 INFO L93 Difference]: Finished difference Result 3359 states and 7152 transitions. [2021-07-13 20:06:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:06:30,173 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 35 [2021-07-13 20:06:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:30,182 INFO L225 Difference]: With dead ends: 3359 [2021-07-13 20:06:30,182 INFO L226 Difference]: Without dead ends: 3170 [2021-07-13 20:06:30,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1097.1ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:06:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-07-13 20:06:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 740. [2021-07-13 20:06:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.266576454668471) internal successors, (1675), 739 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1675 transitions. [2021-07-13 20:06:30,201 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1675 transitions. Word has length 35 [2021-07-13 20:06:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:30,201 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1675 transitions. [2021-07-13 20:06:30,201 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) [2021-07-13 20:06:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1675 transitions. [2021-07-13 20:06:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:06:30,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:30,202 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:30,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:06:30,417 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1190311629, now seen corresponding path program 29 times [2021-07-13 20:06:30,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:30,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357816808] [2021-07-13 20:06:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:30,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:30,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357816808] [2021-07-13 20:06:30,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357816808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:30,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185362078] [2021-07-13 20:06:30,484 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 [2021-07-13 20:06:30,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:06:30,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:30,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:06:30,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:30,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185362078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:30,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:30,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-07-13 20:06:30,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121691259] [2021-07-13 20:06:30,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:30,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:30,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:30,807 INFO L87 Difference]: Start difference. First operand 740 states and 1675 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2021-07-13 20:06:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:32,387 INFO L93 Difference]: Finished difference Result 2167 states and 4649 transitions. [2021-07-13 20:06:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:06:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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 35 [2021-07-13 20:06:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:32,391 INFO L225 Difference]: With dead ends: 2167 [2021-07-13 20:06:32,391 INFO L226 Difference]: Without dead ends: 2163 [2021-07-13 20:06:32,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1427.6ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:06:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-07-13 20:06:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 800. [2021-07-13 20:06:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3204005006257824) internal successors, (1854), 799 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1854 transitions. [2021-07-13 20:06:32,405 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1854 transitions. Word has length 35 [2021-07-13 20:06:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:32,406 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1854 transitions. [2021-07-13 20:06:32,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2021-07-13 20:06:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1854 transitions. [2021-07-13 20:06:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:32,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:32,407 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:32,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:06:32,621 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 30 times [2021-07-13 20:06:32,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:32,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545868922] [2021-07-13 20:06:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:32,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:32,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545868922] [2021-07-13 20:06:32,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545868922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:32,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285538506] [2021-07-13 20:06:32,727 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 [2021-07-13 20:06:32,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:06:32,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:06:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:33,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285538506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:33,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:33,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:06:33,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138139272] [2021-07-13 20:06:33,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:06:33,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:33,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:06:33,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:06:33,085 INFO L87 Difference]: Start difference. First operand 800 states and 1854 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) [2021-07-13 20:06:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:34,592 INFO L93 Difference]: Finished difference Result 1623 states and 3425 transitions. [2021-07-13 20:06:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:06:34,593 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 37 [2021-07-13 20:06:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:34,595 INFO L225 Difference]: With dead ends: 1623 [2021-07-13 20:06:34,595 INFO L226 Difference]: Without dead ends: 1515 [2021-07-13 20:06:34,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 1344.2ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:06:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-13 20:06:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 807. [2021-07-13 20:06:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3089330024813894) internal successors, (1861), 806 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1861 transitions. [2021-07-13 20:06:34,610 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1861 transitions. Word has length 37 [2021-07-13 20:06:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:34,610 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1861 transitions. [2021-07-13 20:06:34,610 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) [2021-07-13 20:06:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1861 transitions. [2021-07-13 20:06:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:34,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:34,611 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:34,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:34,825 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 31 times [2021-07-13 20:06:34,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:34,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374934896] [2021-07-13 20:06:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:34,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374934896] [2021-07-13 20:06:34,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374934896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438330153] [2021-07-13 20:06:34,882 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 [2021-07-13 20:06:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:06:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:35,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438330153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:35,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:35,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-07-13 20:06:35,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539854864] [2021-07-13 20:06:35,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:06:35,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:06:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:06:35,186 INFO L87 Difference]: Start difference. First operand 807 states and 1861 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-13 20:06:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:36,467 INFO L93 Difference]: Finished difference Result 1315 states and 2845 transitions. [2021-07-13 20:06:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:06:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 37 [2021-07-13 20:06:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:36,469 INFO L225 Difference]: With dead ends: 1315 [2021-07-13 20:06:36,470 INFO L226 Difference]: Without dead ends: 1311 [2021-07-13 20:06:36,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1240.0ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:06:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-07-13 20:06:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 787. [2021-07-13 20:06:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.3155216284987277) internal successors, (1820), 786 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1820 transitions. [2021-07-13 20:06:36,480 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1820 transitions. Word has length 37 [2021-07-13 20:06:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:36,480 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1820 transitions. [2021-07-13 20:06:36,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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) [2021-07-13 20:06:36,480 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1820 transitions. [2021-07-13 20:06:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:06:36,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:36,481 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:36,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:06:36,697 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:36,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1424137007, now seen corresponding path program 32 times [2021-07-13 20:06:36,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:36,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169675627] [2021-07-13 20:06:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:36,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:36,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169675627] [2021-07-13 20:06:36,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169675627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:36,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689189387] [2021-07-13 20:06:36,759 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 [2021-07-13 20:06:36,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:36,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:06:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:37,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689189387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:37,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:37,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-07-13 20:06:37,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102269333] [2021-07-13 20:06:37,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:37,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:37,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:37,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:37,038 INFO L87 Difference]: Start difference. First operand 787 states and 1820 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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) [2021-07-13 20:06:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:38,021 INFO L93 Difference]: Finished difference Result 2091 states and 4512 transitions. [2021-07-13 20:06:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:06:38,022 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 37 [2021-07-13 20:06:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:38,025 INFO L225 Difference]: With dead ends: 2091 [2021-07-13 20:06:38,025 INFO L226 Difference]: Without dead ends: 2082 [2021-07-13 20:06:38,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 868.5ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:06:38,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-07-13 20:06:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1285. [2021-07-13 20:06:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 2.367601246105919) internal successors, (3040), 1284 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3040 transitions. [2021-07-13 20:06:38,042 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3040 transitions. Word has length 37 [2021-07-13 20:06:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:38,042 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 3040 transitions. [2021-07-13 20:06:38,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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) [2021-07-13 20:06:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3040 transitions. [2021-07-13 20:06:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:06:38,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:38,044 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:38,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:06:38,260 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-07-13 20:06:38,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:38,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265061610] [2021-07-13 20:06:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:38,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:38,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265061610] [2021-07-13 20:06:38,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265061610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:38,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660632497] [2021-07-13 20:06:38,327 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 [2021-07-13 20:06:38,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:06:38,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:06:38,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660632497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:38,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:38,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-07-13 20:06:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344878995] [2021-07-13 20:06:38,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:06:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:06:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:06:38,478 INFO L87 Difference]: Start difference. First operand 1285 states and 3040 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:38,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:38,629 INFO L93 Difference]: Finished difference Result 1931 states and 4496 transitions. [2021-07-13 20:06:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:06:38,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:06:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:38,632 INFO L225 Difference]: With dead ends: 1931 [2021-07-13 20:06:38,632 INFO L226 Difference]: Without dead ends: 1874 [2021-07-13 20:06:38,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:06:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-07-13 20:06:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1608. [2021-07-13 20:06:38,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.40261356565028) internal successors, (3861), 1607 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 3861 transitions. [2021-07-13 20:06:38,654 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 3861 transitions. Word has length 39 [2021-07-13 20:06:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:38,654 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 3861 transitions. [2021-07-13 20:06:38,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 3861 transitions. [2021-07-13 20:06:38,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:06:38,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:38,656 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:38,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:06:38,877 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 34 times [2021-07-13 20:06:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:38,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150838133] [2021-07-13 20:06:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:38,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:38,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150838133] [2021-07-13 20:06:38,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150838133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:38,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389378417] [2021-07-13 20:06:38,984 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 [2021-07-13 20:06:39,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:39,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:06:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:39,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389378417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:39,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:39,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-07-13 20:06:39,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182977657] [2021-07-13 20:06:39,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:06:39,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:39,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:06:39,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:06:39,381 INFO L87 Difference]: Start difference. First operand 1608 states and 3861 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-07-13 20:06:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:41,469 INFO L93 Difference]: Finished difference Result 3088 states and 6943 transitions. [2021-07-13 20:06:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:06:41,470 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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 39 [2021-07-13 20:06:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:41,474 INFO L225 Difference]: With dead ends: 3088 [2021-07-13 20:06:41,474 INFO L226 Difference]: Without dead ends: 3084 [2021-07-13 20:06:41,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1547.0ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:06:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-07-13 20:06:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1766. [2021-07-13 20:06:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.424929178470255) internal successors, (4280), 1765 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-07-13 20:06:41,498 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-07-13 20:06:41,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:41,498 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-07-13 20:06:41,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 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) [2021-07-13 20:06:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-07-13 20:06:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:06:41,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:41,500 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:41,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 20:06:41,717 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 35 times [2021-07-13 20:06:41,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:41,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488476960] [2021-07-13 20:06:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:41,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:41,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488476960] [2021-07-13 20:06:41,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488476960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:41,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234241330] [2021-07-13 20:06:41,830 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 [2021-07-13 20:06:41,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 20:06:41,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:06:41,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:42,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234241330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:42,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:42,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-13 20:06:42,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60299410] [2021-07-13 20:06:42,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:06:42,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:06:42,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:06:42,182 INFO L87 Difference]: Start difference. First operand 1766 states and 4280 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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) [2021-07-13 20:06:44,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:44,450 INFO L93 Difference]: Finished difference Result 4762 states and 10494 transitions. [2021-07-13 20:06:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:06:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 39 [2021-07-13 20:06:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:44,457 INFO L225 Difference]: With dead ends: 4762 [2021-07-13 20:06:44,457 INFO L226 Difference]: Without dead ends: 4714 [2021-07-13 20:06:44,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3935 ImplicationChecksByTransitivity, 1808.1ms TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2021-07-13 20:06:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-07-13 20:06:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 1566. [2021-07-13 20:06:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.4255591054313097) internal successors, (3796), 1565 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-07-13 20:06:44,487 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-07-13 20:06:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:44,487 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-07-13 20:06:44,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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) [2021-07-13 20:06:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-07-13 20:06:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:06:44,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:44,489 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:44,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:44,709 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 36 times [2021-07-13 20:06:44,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:44,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370904232] [2021-07-13 20:06:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:44,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:44,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370904232] [2021-07-13 20:06:44,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370904232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376509941] [2021-07-13 20:06:44,857 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 [2021-07-13 20:06:44,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:06:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:06:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:45,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376509941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:45,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:45,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-13 20:06:45,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2945053] [2021-07-13 20:06:45,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:06:45,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:45,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:06:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:06:45,207 INFO L87 Difference]: Start difference. First operand 1566 states and 3796 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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) [2021-07-13 20:06:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:46,859 INFO L93 Difference]: Finished difference Result 5523 states and 12031 transitions. [2021-07-13 20:06:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:06:46,860 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 39 [2021-07-13 20:06:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:46,866 INFO L225 Difference]: With dead ends: 5523 [2021-07-13 20:06:46,866 INFO L226 Difference]: Without dead ends: 5397 [2021-07-13 20:06:46,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1441.5ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:06:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-07-13 20:06:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-07-13 20:06:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.4212523719165087) internal successors, (3828), 1581 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-07-13 20:06:46,895 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-07-13 20:06:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:46,895 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-07-13 20:06:46,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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) [2021-07-13 20:06:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-07-13 20:06:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:06:46,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:46,897 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:47,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:06:47,097 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:47,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 37 times [2021-07-13 20:06:47,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:47,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885379627] [2021-07-13 20:06:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:47,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885379627] [2021-07-13 20:06:47,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885379627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026284767] [2021-07-13 20:06:47,219 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 [2021-07-13 20:06:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:47,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:06:47,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:47,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026284767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:47,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 20:06:47,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270035321] [2021-07-13 20:06:47,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:06:47,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:47,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:06:47,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:06:47,601 INFO L87 Difference]: Start difference. First operand 1582 states and 3828 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) [2021-07-13 20:06:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:49,253 INFO L93 Difference]: Finished difference Result 5929 states and 13118 transitions. [2021-07-13 20:06:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:06:49,253 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 39 [2021-07-13 20:06:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:49,259 INFO L225 Difference]: With dead ends: 5929 [2021-07-13 20:06:49,259 INFO L226 Difference]: Without dead ends: 5656 [2021-07-13 20:06:49,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1476.4ms TimeCoverageRelationStatistics Valid=1779, Invalid=7533, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:06:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-07-13 20:06:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 1758. [2021-07-13 20:06:49,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.363118952760387) internal successors, (4152), 1757 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-07-13 20:06:49,291 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-07-13 20:06:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:49,291 INFO L482 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-07-13 20:06:49,291 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) [2021-07-13 20:06:49,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-07-13 20:06:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:06:49,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:49,293 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:49,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-07-13 20:06:49,509 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 38 times [2021-07-13 20:06:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:49,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586571973] [2021-07-13 20:06:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:49,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:49,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586571973] [2021-07-13 20:06:49,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586571973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:49,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943439723] [2021-07-13 20:06:49,593 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 [2021-07-13 20:06:49,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:49,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:06:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:49,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943439723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:49,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:49,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-07-13 20:06:49,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470296690] [2021-07-13 20:06:49,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:06:49,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:06:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:06:49,933 INFO L87 Difference]: Start difference. First operand 1758 states and 4152 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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) [2021-07-13 20:06:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:52,241 INFO L93 Difference]: Finished difference Result 3958 states and 8761 transitions. [2021-07-13 20:06:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-13 20:06:52,242 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 39 [2021-07-13 20:06:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:52,246 INFO L225 Difference]: With dead ends: 3958 [2021-07-13 20:06:52,246 INFO L226 Difference]: Without dead ends: 3954 [2021-07-13 20:06:52,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2091.7ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:06:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-07-13 20:06:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-07-13 20:06:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.3892799133730374) internal successors, (4413), 1847 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-07-13 20:06:52,271 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-07-13 20:06:52,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:52,271 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-07-13 20:06:52,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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) [2021-07-13 20:06:52,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-07-13 20:06:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:06:52,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:52,273 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:52,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:52,489 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:52,489 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 39 times [2021-07-13 20:06:52,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:52,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791133615] [2021-07-13 20:06:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:52,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791133615] [2021-07-13 20:06:52,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791133615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:52,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838761898] [2021-07-13 20:06:52,615 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 [2021-07-13 20:06:52,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:06:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:52,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:06:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:53,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838761898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:53,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:53,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-13 20:06:53,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467559282] [2021-07-13 20:06:53,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:06:53,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:06:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:53,028 INFO L87 Difference]: Start difference. First operand 1848 states and 4413 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) [2021-07-13 20:06:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:54,863 INFO L93 Difference]: Finished difference Result 3268 states and 7276 transitions. [2021-07-13 20:06:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:06:54,864 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 41 [2021-07-13 20:06:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:54,867 INFO L225 Difference]: With dead ends: 3268 [2021-07-13 20:06:54,867 INFO L226 Difference]: Without dead ends: 3049 [2021-07-13 20:06:54,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 1755.0ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-07-13 20:06:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-07-13 20:06:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1787. [2021-07-13 20:06:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.379619260918253) internal successors, (4250), 1786 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-07-13 20:06:54,888 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-07-13 20:06:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:54,888 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-07-13 20:06:54,888 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) [2021-07-13 20:06:54,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-07-13 20:06:54,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:06:54,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:54,890 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:55,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 20:06:55,106 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:55,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 40 times [2021-07-13 20:06:55,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:55,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154781178] [2021-07-13 20:06:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:55,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154781178] [2021-07-13 20:06:55,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154781178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016153521] [2021-07-13 20:06:55,178 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 [2021-07-13 20:06:55,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:55,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:06:55,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016153521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:55,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:55,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-07-13 20:06:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030411479] [2021-07-13 20:06:55,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:06:55,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:55,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:06:55,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:06:55,514 INFO L87 Difference]: Start difference. First operand 1787 states and 4250 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2021-07-13 20:06:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:57,413 INFO L93 Difference]: Finished difference Result 2437 states and 5514 transitions. [2021-07-13 20:06:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:06:57,413 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 41 [2021-07-13 20:06:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:57,416 INFO L225 Difference]: With dead ends: 2437 [2021-07-13 20:06:57,416 INFO L226 Difference]: Without dead ends: 2433 [2021-07-13 20:06:57,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1796.7ms TimeCoverageRelationStatistics Valid=2626, Invalid=8504, Unknown=0, NotChecked=0, Total=11130 [2021-07-13 20:06:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-07-13 20:06:57,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1763. [2021-07-13 20:06:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.38422247446084) internal successors, (4201), 1762 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-07-13 20:06:57,435 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-07-13 20:06:57,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:57,435 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-07-13 20:06:57,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2021-07-13 20:06:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-07-13 20:06:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:06:57,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:57,438 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:57,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:57,653 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 41 times [2021-07-13 20:06:57,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:57,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966375504] [2021-07-13 20:06:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:57,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:57,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966375504] [2021-07-13 20:06:57,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966375504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:57,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179024877] [2021-07-13 20:06:57,727 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 [2021-07-13 20:06:57,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:06:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:06:57,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:57,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179024877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:57,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:57,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 20:06:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024796452] [2021-07-13 20:06:57,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:06:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:06:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:06:57,818 INFO L87 Difference]: Start difference. First operand 1763 states and 4201 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-07-13 20:06:57,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:57,896 INFO L93 Difference]: Finished difference Result 2486 states and 5827 transitions. [2021-07-13 20:06:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:06:57,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:06:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:57,899 INFO L225 Difference]: With dead ends: 2486 [2021-07-13 20:06:57,899 INFO L226 Difference]: Without dead ends: 2429 [2021-07-13 20:06:57,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:06:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-07-13 20:06:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2196. [2021-07-13 20:06:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.4314350797266515) internal successors, (5337), 2195 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:57,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5337 transitions. [2021-07-13 20:06:57,922 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5337 transitions. Word has length 43 [2021-07-13 20:06:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:57,922 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 5337 transitions. [2021-07-13 20:06:57,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-07-13 20:06:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5337 transitions. [2021-07-13 20:06:57,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:06:57,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:57,925 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:58,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:06:58,125 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 42 times [2021-07-13 20:06:58,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:58,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773272552] [2021-07-13 20:06:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:58,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773272552] [2021-07-13 20:06:58,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773272552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:58,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561272078] [2021-07-13 20:06:58,274 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 [2021-07-13 20:06:58,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 20:06:58,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:06:58,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561272078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:58,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:58,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:06:58,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091499204] [2021-07-13 20:06:58,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:06:58,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:06:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:06:58,700 INFO L87 Difference]: Start difference. First operand 2196 states and 5337 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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) [2021-07-13 20:07:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:01,711 INFO L93 Difference]: Finished difference Result 5082 states and 11297 transitions. [2021-07-13 20:07:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:07:01,711 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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 [2021-07-13 20:07:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:01,718 INFO L225 Difference]: With dead ends: 5082 [2021-07-13 20:07:01,718 INFO L226 Difference]: Without dead ends: 5049 [2021-07-13 20:07:01,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 2128.0ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-07-13 20:07:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2021-07-13 20:07:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 2469. [2021-07-13 20:07:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 2.4315235008103726) internal successors, (6001), 2468 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 6001 transitions. [2021-07-13 20:07:01,805 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 6001 transitions. Word has length 43 [2021-07-13 20:07:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:01,805 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 6001 transitions. [2021-07-13 20:07:01,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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) [2021-07-13 20:07:01,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 6001 transitions. [2021-07-13 20:07:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:07:01,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:01,807 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:02,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:07:02,023 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:02,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 43 times [2021-07-13 20:07:02,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:02,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065038388] [2021-07-13 20:07:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:02,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:02,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065038388] [2021-07-13 20:07:02,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065038388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:02,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757822237] [2021-07-13 20:07:02,221 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:07:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:02,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:07:02,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:02,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757822237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:02,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:02,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-07-13 20:07:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960745323] [2021-07-13 20:07:02,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:07:02,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:02,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:07:02,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:07:02,725 INFO L87 Difference]: Start difference. First operand 2469 states and 6001 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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) [2021-07-13 20:07:05,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:05,286 INFO L93 Difference]: Finished difference Result 4063 states and 9266 transitions. [2021-07-13 20:07:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:07:05,286 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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 43 [2021-07-13 20:07:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:05,291 INFO L225 Difference]: With dead ends: 4063 [2021-07-13 20:07:05,291 INFO L226 Difference]: Without dead ends: 4059 [2021-07-13 20:07:05,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 2037.8ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:07:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-07-13 20:07:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 2259. [2021-07-13 20:07:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.425597874224978) internal successors, (5477), 2258 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 5477 transitions. [2021-07-13 20:07:05,322 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 5477 transitions. Word has length 43 [2021-07-13 20:07:05,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:05,322 INFO L482 AbstractCegarLoop]: Abstraction has 2259 states and 5477 transitions. [2021-07-13 20:07:05,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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) [2021-07-13 20:07:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 5477 transitions. [2021-07-13 20:07:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:07:05,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:05,325 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:05,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:05,541 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 44 times [2021-07-13 20:07:05,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:05,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928337050] [2021-07-13 20:07:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:05,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928337050] [2021-07-13 20:07:05,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928337050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805009227] [2021-07-13 20:07:05,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:07:05,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:05,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:07:05,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:06,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805009227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:06,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:06,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-07-13 20:07:06,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571384642] [2021-07-13 20:07:06,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:06,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:06,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:06,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:06,338 INFO L87 Difference]: Start difference. First operand 2259 states and 5477 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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) [2021-07-13 20:07:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:09,426 INFO L93 Difference]: Finished difference Result 5894 states and 13012 transitions. [2021-07-13 20:07:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:07:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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 [2021-07-13 20:07:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:09,433 INFO L225 Difference]: With dead ends: 5894 [2021-07-13 20:07:09,433 INFO L226 Difference]: Without dead ends: 5846 [2021-07-13 20:07:09,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 2443.2ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-07-13 20:07:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-07-13 20:07:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 2347. [2021-07-13 20:07:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 2.411764705882353) internal successors, (5658), 2346 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 5658 transitions. [2021-07-13 20:07:09,467 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 5658 transitions. Word has length 43 [2021-07-13 20:07:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:09,467 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 5658 transitions. [2021-07-13 20:07:09,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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) [2021-07-13 20:07:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 5658 transitions. [2021-07-13 20:07:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:07:09,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:09,469 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:09,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:07:09,670 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:09,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:09,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 45 times [2021-07-13 20:07:09,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:09,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756738847] [2021-07-13 20:07:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:09,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:09,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756738847] [2021-07-13 20:07:09,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756738847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:09,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188389198] [2021-07-13 20:07:09,815 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 [2021-07-13 20:07:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 20:07:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:09,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:07:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:10,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188389198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:10,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:10,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-13 20:07:10,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000730857] [2021-07-13 20:07:10,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:10,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:10,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:10,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:10,285 INFO L87 Difference]: Start difference. First operand 2347 states and 5658 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 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) [2021-07-13 20:07:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:12,820 INFO L93 Difference]: Finished difference Result 7652 states and 16783 transitions. [2021-07-13 20:07:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-13 20:07:12,820 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 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 [2021-07-13 20:07:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:12,829 INFO L225 Difference]: With dead ends: 7652 [2021-07-13 20:07:12,829 INFO L226 Difference]: Without dead ends: 7478 [2021-07-13 20:07:12,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5177 ImplicationChecksByTransitivity, 2197.9ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-07-13 20:07:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-07-13 20:07:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 2225. [2021-07-13 20:07:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 2.428956834532374) internal successors, (5402), 2224 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 5402 transitions. [2021-07-13 20:07:12,867 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 5402 transitions. Word has length 43 [2021-07-13 20:07:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:12,867 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 5402 transitions. [2021-07-13 20:07:12,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 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) [2021-07-13 20:07:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 5402 transitions. [2021-07-13 20:07:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:07:12,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:12,869 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:13,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:13,070 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:13,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:13,070 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 46 times [2021-07-13 20:07:13,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:13,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478624277] [2021-07-13 20:07:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:13,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:13,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478624277] [2021-07-13 20:07:13,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478624277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:13,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650346722] [2021-07-13 20:07:13,225 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 [2021-07-13 20:07:13,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:13,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:13,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650346722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:13,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:13,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-07-13 20:07:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044839312] [2021-07-13 20:07:13,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:07:13,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:13,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:07:13,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:07:13,657 INFO L87 Difference]: Start difference. First operand 2225 states and 5402 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 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) [2021-07-13 20:07:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:15,850 INFO L93 Difference]: Finished difference Result 8464 states and 18466 transitions. [2021-07-13 20:07:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:07:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 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 [2021-07-13 20:07:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:15,860 INFO L225 Difference]: With dead ends: 8464 [2021-07-13 20:07:15,860 INFO L226 Difference]: Without dead ends: 8230 [2021-07-13 20:07:15,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 1886.4ms TimeCoverageRelationStatistics Valid=2344, Invalid=10996, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:07:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-07-13 20:07:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 2241. [2021-07-13 20:07:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.4258928571428573) internal successors, (5434), 2240 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 5434 transitions. [2021-07-13 20:07:15,906 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 5434 transitions. Word has length 43 [2021-07-13 20:07:15,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:15,906 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 5434 transitions. [2021-07-13 20:07:15,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 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) [2021-07-13 20:07:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 5434 transitions. [2021-07-13 20:07:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:07:15,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:15,908 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:16,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 20:07:16,121 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 47 times [2021-07-13 20:07:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:16,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266778266] [2021-07-13 20:07:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:16,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266778266] [2021-07-13 20:07:16,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266778266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106065799] [2021-07-13 20:07:16,290 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 [2021-07-13 20:07:16,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:07:16,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:16,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:07:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106065799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:16,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:07:16,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101745175] [2021-07-13 20:07:16,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:07:16,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:16,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:07:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:07:16,687 INFO L87 Difference]: Start difference. First operand 2241 states and 5434 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 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) [2021-07-13 20:07:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:19,224 INFO L93 Difference]: Finished difference Result 7868 states and 17355 transitions. [2021-07-13 20:07:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:07:19,225 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 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 [2021-07-13 20:07:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:19,234 INFO L225 Difference]: With dead ends: 7868 [2021-07-13 20:07:19,234 INFO L226 Difference]: Without dead ends: 7508 [2021-07-13 20:07:19,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 2229.3ms TimeCoverageRelationStatistics Valid=3415, Invalid=13615, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 20:07:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-07-13 20:07:19,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 2254. [2021-07-13 20:07:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 2.361739902352419) internal successors, (5321), 2253 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5321 transitions. [2021-07-13 20:07:19,281 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5321 transitions. Word has length 43 [2021-07-13 20:07:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:19,282 INFO L482 AbstractCegarLoop]: Abstraction has 2254 states and 5321 transitions. [2021-07-13 20:07:19,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 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) [2021-07-13 20:07:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5321 transitions. [2021-07-13 20:07:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:07:19,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:19,284 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:19,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:19,488 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:19,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:19,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 48 times [2021-07-13 20:07:19,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:19,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653994842] [2021-07-13 20:07:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:19,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653994842] [2021-07-13 20:07:19,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653994842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269587252] [2021-07-13 20:07:19,595 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 [2021-07-13 20:07:19,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:07:19,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:19,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:19,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269587252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:19,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-07-13 20:07:19,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789159394] [2021-07-13 20:07:19,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:07:19,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:19,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:07:19,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:07:19,972 INFO L87 Difference]: Start difference. First operand 2254 states and 5321 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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) [2021-07-13 20:07:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:23,290 INFO L93 Difference]: Finished difference Result 5015 states and 11067 transitions. [2021-07-13 20:07:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-07-13 20:07:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 43 [2021-07-13 20:07:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:23,296 INFO L225 Difference]: With dead ends: 5015 [2021-07-13 20:07:23,296 INFO L226 Difference]: Without dead ends: 5011 [2021-07-13 20:07:23,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 3061.1ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-07-13 20:07:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-07-13 20:07:23,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 2303. [2021-07-13 20:07:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.385317115551694) internal successors, (5491), 2302 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 5491 transitions. [2021-07-13 20:07:23,327 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 5491 transitions. Word has length 43 [2021-07-13 20:07:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:23,327 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 5491 transitions. [2021-07-13 20:07:23,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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) [2021-07-13 20:07:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 5491 transitions. [2021-07-13 20:07:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:07:23,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:23,330 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:23,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:23,530 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:23,531 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 49 times [2021-07-13 20:07:23,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:23,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817299154] [2021-07-13 20:07:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:23,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:23,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817299154] [2021-07-13 20:07:23,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817299154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538465039] [2021-07-13 20:07:23,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:23,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:24,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538465039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:24,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:24,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-07-13 20:07:24,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133276350] [2021-07-13 20:07:24,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:07:24,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:24,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:07:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:07:24,132 INFO L87 Difference]: Start difference. First operand 2303 states and 5491 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) [2021-07-13 20:07:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:26,661 INFO L93 Difference]: Finished difference Result 3620 states and 8022 transitions. [2021-07-13 20:07:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:07:26,661 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 45 [2021-07-13 20:07:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:26,665 INFO L225 Difference]: With dead ends: 3620 [2021-07-13 20:07:26,665 INFO L226 Difference]: Without dead ends: 3422 [2021-07-13 20:07:26,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2319.8ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-07-13 20:07:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-07-13 20:07:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2306. [2021-07-13 20:07:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3800433839479394) internal successors, (5486), 2305 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5486 transitions. [2021-07-13 20:07:26,695 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5486 transitions. Word has length 45 [2021-07-13 20:07:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:26,695 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5486 transitions. [2021-07-13 20:07:26,695 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) [2021-07-13 20:07:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5486 transitions. [2021-07-13 20:07:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:07:26,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:26,698 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:26,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:26,913 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 50 times [2021-07-13 20:07:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:26,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666443228] [2021-07-13 20:07:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:26,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666443228] [2021-07-13 20:07:26,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666443228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653483478] [2021-07-13 20:07:26,997 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 [2021-07-13 20:07:27,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:27,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:07:27,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:27,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653483478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:27,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:27,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-07-13 20:07:27,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310397910] [2021-07-13 20:07:27,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:27,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:27,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:27,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:27,388 INFO L87 Difference]: Start difference. First operand 2306 states and 5486 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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) [2021-07-13 20:07:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:29,716 INFO L93 Difference]: Finished difference Result 3140 states and 7114 transitions. [2021-07-13 20:07:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:07:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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 45 [2021-07-13 20:07:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:29,720 INFO L225 Difference]: With dead ends: 3140 [2021-07-13 20:07:29,720 INFO L226 Difference]: Without dead ends: 3136 [2021-07-13 20:07:29,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 2226.8ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-07-13 20:07:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-07-13 20:07:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2306. [2021-07-13 20:07:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3796095444685466) internal successors, (5485), 2305 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5485 transitions. [2021-07-13 20:07:29,743 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5485 transitions. Word has length 45 [2021-07-13 20:07:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:29,743 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5485 transitions. [2021-07-13 20:07:29,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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) [2021-07-13 20:07:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5485 transitions. [2021-07-13 20:07:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:07:29,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:29,746 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:29,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:29,946 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:29,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1657156185, now seen corresponding path program 51 times [2021-07-13 20:07:29,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:29,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974018378] [2021-07-13 20:07:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:30,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:30,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974018378] [2021-07-13 20:07:30,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974018378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:30,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192417730] [2021-07-13 20:07:30,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:30,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 20:07:30,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:30,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:30,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:30,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192417730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:30,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:30,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-07-13 20:07:30,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820851462] [2021-07-13 20:07:30,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:07:30,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:30,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:07:30,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:07:30,483 INFO L87 Difference]: Start difference. First operand 2306 states and 5485 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 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) [2021-07-13 20:07:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:32,892 INFO L93 Difference]: Finished difference Result 6205 states and 13891 transitions. [2021-07-13 20:07:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-13 20:07:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 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 45 [2021-07-13 20:07:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:32,900 INFO L225 Difference]: With dead ends: 6205 [2021-07-13 20:07:32,900 INFO L226 Difference]: Without dead ends: 6205 [2021-07-13 20:07:32,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 2216.0ms TimeCoverageRelationStatistics Valid=3242, Invalid=10098, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:07:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-07-13 20:07:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 3688. [2021-07-13 20:07:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.414429075128831) internal successors, (8902), 3687 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 8902 transitions. [2021-07-13 20:07:32,945 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 8902 transitions. Word has length 45 [2021-07-13 20:07:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:32,945 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 8902 transitions. [2021-07-13 20:07:32,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 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) [2021-07-13 20:07:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 8902 transitions. [2021-07-13 20:07:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:07:32,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:32,950 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:33,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 20:07:33,150 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 52 times [2021-07-13 20:07:33,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:33,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349635722] [2021-07-13 20:07:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:33,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:33,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349635722] [2021-07-13 20:07:33,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349635722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837491911] [2021-07-13 20:07:33,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:33,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:33,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:07:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:33,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837491911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:33,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 20:07:33,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360232340] [2021-07-13 20:07:33,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:07:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:07:33,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:33,330 INFO L87 Difference]: Start difference. First operand 3688 states and 8902 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:33,481 INFO L93 Difference]: Finished difference Result 4861 states and 11682 transitions. [2021-07-13 20:07:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:07:33,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:07:33,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:33,487 INFO L225 Difference]: With dead ends: 4861 [2021-07-13 20:07:33,487 INFO L226 Difference]: Without dead ends: 4798 [2021-07-13 20:07:33,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:07:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-07-13 20:07:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4433. [2021-07-13 20:07:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4432 states have (on average 2.4490072202166067) internal successors, (10854), 4432 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 10854 transitions. [2021-07-13 20:07:33,571 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 10854 transitions. Word has length 47 [2021-07-13 20:07:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:33,572 INFO L482 AbstractCegarLoop]: Abstraction has 4433 states and 10854 transitions. [2021-07-13 20:07:33,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 10854 transitions. [2021-07-13 20:07:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:07:33,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:33,577 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:33,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:33,788 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 53 times [2021-07-13 20:07:33,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:33,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624655472] [2021-07-13 20:07:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:34,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:34,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624655472] [2021-07-13 20:07:34,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624655472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718861121] [2021-07-13 20:07:34,062 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 [2021-07-13 20:07:34,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 20:07:34,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:34,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:34,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:34,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718861121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:34,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-07-13 20:07:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131969380] [2021-07-13 20:07:34,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:07:34,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:34,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:07:34,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:07:34,612 INFO L87 Difference]: Start difference. First operand 4433 states and 10854 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) [2021-07-13 20:07:37,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:37,469 INFO L93 Difference]: Finished difference Result 5913 states and 13861 transitions. [2021-07-13 20:07:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:07:37,469 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 47 [2021-07-13 20:07:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:37,477 INFO L225 Difference]: With dead ends: 5913 [2021-07-13 20:07:37,477 INFO L226 Difference]: Without dead ends: 5907 [2021-07-13 20:07:37,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2191.6ms TimeCoverageRelationStatistics Valid=978, Invalid=10152, Unknown=0, NotChecked=0, Total=11130 [2021-07-13 20:07:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-07-13 20:07:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 4386. [2021-07-13 20:07:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 2.4408209806157353) internal successors, (10703), 4385 states have internal predecessors, (10703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 10703 transitions. [2021-07-13 20:07:37,528 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 10703 transitions. Word has length 47 [2021-07-13 20:07:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:37,528 INFO L482 AbstractCegarLoop]: Abstraction has 4386 states and 10703 transitions. [2021-07-13 20:07:37,528 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) [2021-07-13 20:07:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 10703 transitions. [2021-07-13 20:07:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:07:37,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:37,533 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:37,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:37,734 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:37,734 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 54 times [2021-07-13 20:07:37,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:37,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907046506] [2021-07-13 20:07:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:37,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:37,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907046506] [2021-07-13 20:07:37,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907046506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:37,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753186356] [2021-07-13 20:07:37,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:37,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 20:07:37,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:37,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:07:37,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:38,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753186356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:38,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-07-13 20:07:38,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597899130] [2021-07-13 20:07:38,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:07:38,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:38,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:07:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:07:38,380 INFO L87 Difference]: Start difference. First operand 4386 states and 10703 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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) [2021-07-13 20:07:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:41,829 INFO L93 Difference]: Finished difference Result 8676 states and 19853 transitions. [2021-07-13 20:07:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-13 20:07:41,829 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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 47 [2021-07-13 20:07:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:41,840 INFO L225 Difference]: With dead ends: 8676 [2021-07-13 20:07:41,841 INFO L226 Difference]: Without dead ends: 8652 [2021-07-13 20:07:41,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 2439.4ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-07-13 20:07:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2021-07-13 20:07:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 4780. [2021-07-13 20:07:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 2.446746181209458) internal successors, (11693), 4779 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 11693 transitions. [2021-07-13 20:07:41,915 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 11693 transitions. Word has length 47 [2021-07-13 20:07:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:41,915 INFO L482 AbstractCegarLoop]: Abstraction has 4780 states and 11693 transitions. [2021-07-13 20:07:41,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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) [2021-07-13 20:07:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 11693 transitions. [2021-07-13 20:07:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:07:41,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:41,920 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:42,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:42,126 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:42,126 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 55 times [2021-07-13 20:07:42,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:42,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508311500] [2021-07-13 20:07:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:42,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508311500] [2021-07-13 20:07:42,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508311500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583334083] [2021-07-13 20:07:42,258 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 [2021-07-13 20:07:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:07:42,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583334083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:42,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-07-13 20:07:42,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757866136] [2021-07-13 20:07:42,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:07:42,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:42,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:07:42,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:42,754 INFO L87 Difference]: Start difference. First operand 4780 states and 11693 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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) [2021-07-13 20:07:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:45,959 INFO L93 Difference]: Finished difference Result 6903 states and 16158 transitions. [2021-07-13 20:07:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:07:45,959 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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 47 [2021-07-13 20:07:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:45,967 INFO L225 Difference]: With dead ends: 6903 [2021-07-13 20:07:45,967 INFO L226 Difference]: Without dead ends: 6899 [2021-07-13 20:07:45,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2076.7ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-07-13 20:07:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-07-13 20:07:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4480. [2021-07-13 20:07:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 2.444965394061174) internal successors, (10951), 4479 states have internal predecessors, (10951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 10951 transitions. [2021-07-13 20:07:46,017 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 10951 transitions. Word has length 47 [2021-07-13 20:07:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:46,017 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 10951 transitions. [2021-07-13 20:07:46,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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) [2021-07-13 20:07:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 10951 transitions. [2021-07-13 20:07:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:07:46,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:46,022 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:46,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 20:07:46,223 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:46,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 56 times [2021-07-13 20:07:46,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:46,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058225280] [2021-07-13 20:07:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:46,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:46,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058225280] [2021-07-13 20:07:46,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058225280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694547307] [2021-07-13 20:07:46,371 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 [2021-07-13 20:07:46,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:46,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:07:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:46,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694547307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:46,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-07-13 20:07:46,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664639644] [2021-07-13 20:07:46,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:07:46,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:46,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:07:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:07:46,836 INFO L87 Difference]: Start difference. First operand 4480 states and 10951 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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) [2021-07-13 20:07:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:50,694 INFO L93 Difference]: Finished difference Result 10549 states and 24047 transitions. [2021-07-13 20:07:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:07:50,694 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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 47 [2021-07-13 20:07:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:50,708 INFO L225 Difference]: With dead ends: 10549 [2021-07-13 20:07:50,708 INFO L226 Difference]: Without dead ends: 10501 [2021-07-13 20:07:50,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 2856.3ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-07-13 20:07:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-07-13 20:07:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 4420. [2021-07-13 20:07:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 2.4433129667345552) internal successors, (10797), 4419 states have internal predecessors, (10797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 10797 transitions. [2021-07-13 20:07:50,786 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 10797 transitions. Word has length 47 [2021-07-13 20:07:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:50,786 INFO L482 AbstractCegarLoop]: Abstraction has 4420 states and 10797 transitions. [2021-07-13 20:07:50,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 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) [2021-07-13 20:07:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 10797 transitions. [2021-07-13 20:07:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:07:50,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:50,790 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:50,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 20:07:50,991 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 57 times [2021-07-13 20:07:50,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:50,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094759627] [2021-07-13 20:07:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:51,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:51,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094759627] [2021-07-13 20:07:51,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094759627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:51,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911447599] [2021-07-13 20:07:51,148 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 [2021-07-13 20:07:51,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 20:07:51,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:51,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:07:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:51,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911447599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:51,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:51,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-07-13 20:07:51,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737347007] [2021-07-13 20:07:51,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:07:51,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:51,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:07:51,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:07:51,638 INFO L87 Difference]: Start difference. First operand 4420 states and 10797 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 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) [2021-07-13 20:07:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:55,613 INFO L93 Difference]: Finished difference Result 12102 states and 27344 transitions. [2021-07-13 20:07:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-13 20:07:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 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 47 [2021-07-13 20:07:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:55,630 INFO L225 Difference]: With dead ends: 12102 [2021-07-13 20:07:55,630 INFO L226 Difference]: Without dead ends: 12024 [2021-07-13 20:07:55,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 2894.7ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-07-13 20:07:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-07-13 20:07:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 4352. [2021-07-13 20:07:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 2.4474833371638702) internal successors, (10649), 4351 states have internal predecessors, (10649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 10649 transitions. [2021-07-13 20:07:55,710 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 10649 transitions. Word has length 47 [2021-07-13 20:07:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:55,710 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 10649 transitions. [2021-07-13 20:07:55,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 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) [2021-07-13 20:07:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 10649 transitions. [2021-07-13 20:07:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:07:55,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:55,714 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:55,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:55,915 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:55,915 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 58 times [2021-07-13 20:07:55,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:55,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209637639] [2021-07-13 20:07:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:56,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:56,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209637639] [2021-07-13 20:07:56,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209637639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:56,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640082963] [2021-07-13 20:07:56,068 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 [2021-07-13 20:07:56,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:56,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:56,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:07:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:56,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640082963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:56,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:56,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-07-13 20:07:56,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752993483] [2021-07-13 20:07:56,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:07:56,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:07:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:07:56,545 INFO L87 Difference]: Start difference. First operand 4352 states and 10649 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 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) [2021-07-13 20:07:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:59,139 INFO L93 Difference]: Finished difference Result 14421 states and 32596 transitions. [2021-07-13 20:07:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 20:07:59,139 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 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 47 [2021-07-13 20:07:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:59,155 INFO L225 Difference]: With dead ends: 14421 [2021-07-13 20:07:59,155 INFO L226 Difference]: Without dead ends: 14229 [2021-07-13 20:07:59,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 2190.1ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-07-13 20:07:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14229 states. [2021-07-13 20:07:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14229 to 4384. [2021-07-13 20:07:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4442162902121836) internal successors, (10713), 4383 states have internal predecessors, (10713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10713 transitions. [2021-07-13 20:07:59,227 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10713 transitions. Word has length 47 [2021-07-13 20:07:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:59,227 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 10713 transitions. [2021-07-13 20:07:59,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 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) [2021-07-13 20:07:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10713 transitions. [2021-07-13 20:07:59,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:07:59,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:59,230 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:59,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-13 20:07:59,431 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:59,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:59,431 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 59 times [2021-07-13 20:07:59,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:59,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774434730] [2021-07-13 20:07:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:59,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:59,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774434730] [2021-07-13 20:07:59,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774434730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:59,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236332985] [2021-07-13 20:07:59,595 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 [2021-07-13 20:07:59,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:07:59,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:00,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236332985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:00,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-07-13 20:08:00,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304623563] [2021-07-13 20:08:00,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:08:00,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:00,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:08:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:08:00,044 INFO L87 Difference]: Start difference. First operand 4384 states and 10713 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) [2021-07-13 20:08:03,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:03,203 INFO L93 Difference]: Finished difference Result 14220 states and 31957 transitions. [2021-07-13 20:08:03,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-07-13 20:08:03,204 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 47 [2021-07-13 20:08:03,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:03,221 INFO L225 Difference]: With dead ends: 14220 [2021-07-13 20:08:03,221 INFO L226 Difference]: Without dead ends: 13917 [2021-07-13 20:08:03,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8361 ImplicationChecksByTransitivity, 2602.0ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-07-13 20:08:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2021-07-13 20:08:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 4404. [2021-07-13 20:08:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.4421985010220304) internal successors, (10753), 4403 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 10753 transitions. [2021-07-13 20:08:03,309 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 10753 transitions. Word has length 47 [2021-07-13 20:08:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:03,309 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 10753 transitions. [2021-07-13 20:08:03,309 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) [2021-07-13 20:08:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 10753 transitions. [2021-07-13 20:08:03,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:03,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:03,312 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:03,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:03,513 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:03,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:03,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 60 times [2021-07-13 20:08:03,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:03,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899767498] [2021-07-13 20:08:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:03,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:03,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899767498] [2021-07-13 20:08:03,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899767498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:03,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191919735] [2021-07-13 20:08:03,682 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 [2021-07-13 20:08:03,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:08:03,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:08:03,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:04,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191919735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:04,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:04,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:08:04,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983765762] [2021-07-13 20:08:04,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:08:04,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:04,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:08:04,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:08:04,203 INFO L87 Difference]: Start difference. First operand 4404 states and 10753 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 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) [2021-07-13 20:08:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:07,452 INFO L93 Difference]: Finished difference Result 13609 states and 30879 transitions. [2021-07-13 20:08:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:08:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 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 47 [2021-07-13 20:08:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:07,470 INFO L225 Difference]: With dead ends: 13609 [2021-07-13 20:08:07,470 INFO L226 Difference]: Without dead ends: 13078 [2021-07-13 20:08:07,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8506 ImplicationChecksByTransitivity, 2933.6ms TimeCoverageRelationStatistics Valid=4891, Invalid=19289, Unknown=0, NotChecked=0, Total=24180 [2021-07-13 20:08:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-07-13 20:08:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 4605. [2021-07-13 20:08:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.386185925282363) internal successors, (10986), 4604 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 10986 transitions. [2021-07-13 20:08:07,555 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 10986 transitions. Word has length 47 [2021-07-13 20:08:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:07,555 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 10986 transitions. [2021-07-13 20:08:07,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 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) [2021-07-13 20:08:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 10986 transitions. [2021-07-13 20:08:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:08:07,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:07,559 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:07,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-07-13 20:08:07,759 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:07,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 61 times [2021-07-13 20:08:07,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:07,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546548874] [2021-07-13 20:08:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:07,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546548874] [2021-07-13 20:08:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546548874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:07,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908652258] [2021-07-13 20:08:07,857 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 [2021-07-13 20:08:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:08:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:08,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908652258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:08,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:08,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2021-07-13 20:08:08,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39178089] [2021-07-13 20:08:08,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:08:08,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:08:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:08:08,275 INFO L87 Difference]: Start difference. First operand 4605 states and 10986 transitions. Second operand has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 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) [2021-07-13 20:08:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:10,931 INFO L93 Difference]: Finished difference Result 9014 states and 20637 transitions. [2021-07-13 20:08:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:08:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 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 47 [2021-07-13 20:08:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:10,943 INFO L225 Difference]: With dead ends: 9014 [2021-07-13 20:08:10,943 INFO L226 Difference]: Without dead ends: 9010 [2021-07-13 20:08:10,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6196 ImplicationChecksByTransitivity, 2388.0ms TimeCoverageRelationStatistics Valid=3809, Invalid=13221, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 20:08:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-07-13 20:08:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4724. [2021-07-13 20:08:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 2.4084268473427906) internal successors, (11375), 4723 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 11375 transitions. [2021-07-13 20:08:11,045 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 11375 transitions. Word has length 47 [2021-07-13 20:08:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:11,045 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 11375 transitions. [2021-07-13 20:08:11,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 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) [2021-07-13 20:08:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 11375 transitions. [2021-07-13 20:08:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 20:08:11,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:11,050 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:11,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:11,265 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 62 times [2021-07-13 20:08:11,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:11,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150475404] [2021-07-13 20:08:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:11,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:11,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150475404] [2021-07-13 20:08:11,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150475404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:11,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951444508] [2021-07-13 20:08:11,496 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 [2021-07-13 20:08:11,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-13 20:08:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:12,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951444508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:12,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:12,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-07-13 20:08:12,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844786978] [2021-07-13 20:08:12,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:08:12,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:12,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:08:12,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:08:12,050 INFO L87 Difference]: Start difference. First operand 4724 states and 11375 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) [2021-07-13 20:08:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:15,682 INFO L93 Difference]: Finished difference Result 6691 states and 15329 transitions. [2021-07-13 20:08:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-13 20:08:15,682 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 49 [2021-07-13 20:08:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:15,690 INFO L225 Difference]: With dead ends: 6691 [2021-07-13 20:08:15,690 INFO L226 Difference]: Without dead ends: 6421 [2021-07-13 20:08:15,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 3325.6ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-07-13 20:08:15,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-07-13 20:08:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4591. [2021-07-13 20:08:15,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 2.4004357298474948) internal successors, (11018), 4590 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 11018 transitions. [2021-07-13 20:08:15,764 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 11018 transitions. Word has length 49 [2021-07-13 20:08:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:15,764 INFO L482 AbstractCegarLoop]: Abstraction has 4591 states and 11018 transitions. [2021-07-13 20:08:15,764 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) [2021-07-13 20:08:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 11018 transitions. [2021-07-13 20:08:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 20:08:15,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:15,769 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:15,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-07-13 20:08:15,986 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:15,987 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 63 times [2021-07-13 20:08:15,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:15,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344246398] [2021-07-13 20:08:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:16,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:16,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344246398] [2021-07-13 20:08:16,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344246398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:16,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244092354] [2021-07-13 20:08:16,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:16,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 20:08:16,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:16,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:08:16,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 17 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:16,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244092354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:16,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:16,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2021-07-13 20:08:16,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25332111] [2021-07-13 20:08:16,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:16,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:16,887 INFO L87 Difference]: Start difference. First operand 4591 states and 11018 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 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) [2021-07-13 20:08:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:22,543 INFO L93 Difference]: Finished difference Result 8254 states and 18601 transitions. [2021-07-13 20:08:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-07-13 20:08:22,543 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 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 49 [2021-07-13 20:08:22,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:22,553 INFO L225 Difference]: With dead ends: 8254 [2021-07-13 20:08:22,553 INFO L226 Difference]: Without dead ends: 8250 [2021-07-13 20:08:22,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19820 ImplicationChecksByTransitivity, 5225.0ms TimeCoverageRelationStatistics Valid=9481, Invalid=36529, Unknown=0, NotChecked=0, Total=46010 [2021-07-13 20:08:22,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8250 states. [2021-07-13 20:08:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8250 to 4599. [2021-07-13 20:08:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 4598 states have (on average 2.4006089604175727) internal successors, (11038), 4598 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 11038 transitions. [2021-07-13 20:08:22,613 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 11038 transitions. Word has length 49 [2021-07-13 20:08:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:22,613 INFO L482 AbstractCegarLoop]: Abstraction has 4599 states and 11038 transitions. [2021-07-13 20:08:22,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 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) [2021-07-13 20:08:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 11038 transitions. [2021-07-13 20:08:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:22,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:22,617 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:22,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:22,820 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:22,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 64 times [2021-07-13 20:08:22,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:22,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890706214] [2021-07-13 20:08:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:22,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:22,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890706214] [2021-07-13 20:08:22,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890706214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:22,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642029603] [2021-07-13 20:08:22,917 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 [2021-07-13 20:08:22,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:22,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:22,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:08:22,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:23,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642029603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:23,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:23,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 20:08:23,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875523656] [2021-07-13 20:08:23,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:08:23,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:08:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:08:23,014 INFO L87 Difference]: Start difference. First operand 4599 states and 11038 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:23,138 INFO L93 Difference]: Finished difference Result 5889 states and 14053 transitions. [2021-07-13 20:08:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:08:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:08:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:23,145 INFO L225 Difference]: With dead ends: 5889 [2021-07-13 20:08:23,145 INFO L226 Difference]: Without dead ends: 5820 [2021-07-13 20:08:23,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:08:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-07-13 20:08:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5433. [2021-07-13 20:08:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5432 states have (on average 2.43740795287187) internal successors, (13240), 5432 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 13240 transitions. [2021-07-13 20:08:23,208 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 13240 transitions. Word has length 51 [2021-07-13 20:08:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:23,208 INFO L482 AbstractCegarLoop]: Abstraction has 5433 states and 13240 transitions. [2021-07-13 20:08:23,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 13240 transitions. [2021-07-13 20:08:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:23,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:23,212 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:23,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 20:08:23,413 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:23,413 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 65 times [2021-07-13 20:08:23,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:23,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528314094] [2021-07-13 20:08:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:23,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:23,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528314094] [2021-07-13 20:08:23,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528314094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:23,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289664766] [2021-07-13 20:08:23,688 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 [2021-07-13 20:08:23,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 20:08:23,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:23,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:08:23,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:24,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289664766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:24,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:24,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-07-13 20:08:24,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100857744] [2021-07-13 20:08:24,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:08:24,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:24,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:08:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:08:24,353 INFO L87 Difference]: Start difference. First operand 5433 states and 13240 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) [2021-07-13 20:08:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:27,621 INFO L93 Difference]: Finished difference Result 7094 states and 16636 transitions. [2021-07-13 20:08:27,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:08:27,621 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 51 [2021-07-13 20:08:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:27,631 INFO L225 Difference]: With dead ends: 7094 [2021-07-13 20:08:27,631 INFO L226 Difference]: Without dead ends: 7088 [2021-07-13 20:08:27,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 2597.6ms TimeCoverageRelationStatistics Valid=1100, Invalid=12706, Unknown=0, NotChecked=0, Total=13806 [2021-07-13 20:08:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2021-07-13 20:08:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 5314. [2021-07-13 20:08:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 5313 states have (on average 2.43553547901374) internal successors, (12940), 5313 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 12940 transitions. [2021-07-13 20:08:27,695 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 12940 transitions. Word has length 51 [2021-07-13 20:08:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:27,695 INFO L482 AbstractCegarLoop]: Abstraction has 5314 states and 12940 transitions. [2021-07-13 20:08:27,695 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) [2021-07-13 20:08:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 12940 transitions. [2021-07-13 20:08:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:27,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:27,699 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:27,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 20:08:27,900 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:27,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 66 times [2021-07-13 20:08:27,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:27,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510724804] [2021-07-13 20:08:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:28,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:28,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510724804] [2021-07-13 20:08:28,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510724804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:28,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868398992] [2021-07-13 20:08:28,090 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 [2021-07-13 20:08:28,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 20:08:28,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:08:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:28,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868398992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:28,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:28,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-07-13 20:08:28,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660599020] [2021-07-13 20:08:28,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:08:28,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:08:28,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:08:28,663 INFO L87 Difference]: Start difference. First operand 5314 states and 12940 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 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) [2021-07-13 20:08:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:32,871 INFO L93 Difference]: Finished difference Result 10585 states and 24178 transitions. [2021-07-13 20:08:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-07-13 20:08:32,871 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 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 51 [2021-07-13 20:08:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:32,885 INFO L225 Difference]: With dead ends: 10585 [2021-07-13 20:08:32,885 INFO L226 Difference]: Without dead ends: 10561 [2021-07-13 20:08:32,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 2930.2ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-07-13 20:08:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-07-13 20:08:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 5782. [2021-07-13 20:08:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5782 states, 5781 states have (on average 2.44075419477599) internal successors, (14110), 5781 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 14110 transitions. [2021-07-13 20:08:32,973 INFO L78 Accepts]: Start accepts. Automaton has 5782 states and 14110 transitions. Word has length 51 [2021-07-13 20:08:32,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:32,973 INFO L482 AbstractCegarLoop]: Abstraction has 5782 states and 14110 transitions. [2021-07-13 20:08:32,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 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) [2021-07-13 20:08:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5782 states and 14110 transitions. [2021-07-13 20:08:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:32,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:32,978 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:33,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-13 20:08:33,189 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash 279303115, now seen corresponding path program 67 times [2021-07-13 20:08:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:33,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96440491] [2021-07-13 20:08:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:33,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:33,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96440491] [2021-07-13 20:08:33,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96440491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332890327] [2021-07-13 20:08:33,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:33,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:08:33,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:33,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332890327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:33,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-07-13 20:08:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40725166] [2021-07-13 20:08:33,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:08:33,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:08:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:08:33,927 INFO L87 Difference]: Start difference. First operand 5782 states and 14110 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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) [2021-07-13 20:08:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:37,243 INFO L93 Difference]: Finished difference Result 8201 states and 19178 transitions. [2021-07-13 20:08:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:08:37,243 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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 51 [2021-07-13 20:08:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:37,254 INFO L225 Difference]: With dead ends: 8201 [2021-07-13 20:08:37,254 INFO L226 Difference]: Without dead ends: 8197 [2021-07-13 20:08:37,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 2459.2ms TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-07-13 20:08:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-07-13 20:08:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 5452. [2021-07-13 20:08:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 2.439185470555861) internal successors, (13296), 5451 states have internal predecessors, (13296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 13296 transitions. [2021-07-13 20:08:37,328 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 13296 transitions. Word has length 51 [2021-07-13 20:08:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:37,328 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 13296 transitions. [2021-07-13 20:08:37,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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) [2021-07-13 20:08:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 13296 transitions. [2021-07-13 20:08:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:37,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:37,333 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:37,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:37,549 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1388875227, now seen corresponding path program 68 times [2021-07-13 20:08:37,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:37,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699650145] [2021-07-13 20:08:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:37,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:37,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699650145] [2021-07-13 20:08:37,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699650145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166841258] [2021-07-13 20:08:37,747 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 [2021-07-13 20:08:37,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:38,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166841258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:38,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-07-13 20:08:38,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049012404] [2021-07-13 20:08:38,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:08:38,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:08:38,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:08:38,281 INFO L87 Difference]: Start difference. First operand 5452 states and 13296 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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) [2021-07-13 20:08:43,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:43,261 INFO L93 Difference]: Finished difference Result 12411 states and 28171 transitions. [2021-07-13 20:08:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-07-13 20:08:43,262 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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 51 [2021-07-13 20:08:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:43,280 INFO L225 Difference]: With dead ends: 12411 [2021-07-13 20:08:43,280 INFO L226 Difference]: Without dead ends: 12363 [2021-07-13 20:08:43,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 3520.8ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-07-13 20:08:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2021-07-13 20:08:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 5448. [2021-07-13 20:08:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.4384064622728108) internal successors, (13282), 5447 states have internal predecessors, (13282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 13282 transitions. [2021-07-13 20:08:43,407 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 13282 transitions. Word has length 51 [2021-07-13 20:08:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:43,408 INFO L482 AbstractCegarLoop]: Abstraction has 5448 states and 13282 transitions. [2021-07-13 20:08:43,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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) [2021-07-13 20:08:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 13282 transitions. [2021-07-13 20:08:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:43,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:43,413 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:43,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:43,613 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:43,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:43,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1681194409, now seen corresponding path program 69 times [2021-07-13 20:08:43,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:43,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556951080] [2021-07-13 20:08:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:43,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:43,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556951080] [2021-07-13 20:08:43,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556951080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:43,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146984688] [2021-07-13 20:08:43,782 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 [2021-07-13 20:08:43,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 20:08:43,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:44,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146984688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:44,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:44,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-07-13 20:08:44,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668723905] [2021-07-13 20:08:44,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:08:44,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:08:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:08:44,313 INFO L87 Difference]: Start difference. First operand 5448 states and 13282 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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) [2021-07-13 20:08:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:49,459 INFO L93 Difference]: Finished difference Result 15077 states and 34147 transitions. [2021-07-13 20:08:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-13 20:08:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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 51 [2021-07-13 20:08:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:49,477 INFO L225 Difference]: With dead ends: 15077 [2021-07-13 20:08:49,477 INFO L226 Difference]: Without dead ends: 14999 [2021-07-13 20:08:49,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 3773.6ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-07-13 20:08:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14999 states. [2021-07-13 20:08:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14999 to 5335. [2021-07-13 20:08:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5334 states have (on average 2.4401949756280463) internal successors, (13016), 5334 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 13016 transitions. [2021-07-13 20:08:49,569 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 13016 transitions. Word has length 51 [2021-07-13 20:08:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:49,570 INFO L482 AbstractCegarLoop]: Abstraction has 5335 states and 13016 transitions. [2021-07-13 20:08:49,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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) [2021-07-13 20:08:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 13016 transitions. [2021-07-13 20:08:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:49,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:49,574 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:49,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 20:08:49,776 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:49,776 INFO L82 PathProgramCache]: Analyzing trace with hash -393169363, now seen corresponding path program 70 times [2021-07-13 20:08:49,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:49,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394700448] [2021-07-13 20:08:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:49,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394700448] [2021-07-13 20:08:49,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394700448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:49,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116226834] [2021-07-13 20:08:49,951 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 [2021-07-13 20:08:49,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:49,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:49,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:08:49,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:50,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116226834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:50,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:50,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-07-13 20:08:50,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063029406] [2021-07-13 20:08:50,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:08:50,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:08:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:08:50,455 INFO L87 Difference]: Start difference. First operand 5335 states and 13016 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 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) [2021-07-13 20:08:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:54,768 INFO L93 Difference]: Finished difference Result 16843 states and 37762 transitions. [2021-07-13 20:08:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-07-13 20:08:54,769 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 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 51 [2021-07-13 20:08:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:54,792 INFO L225 Difference]: With dead ends: 16843 [2021-07-13 20:08:54,792 INFO L226 Difference]: Without dead ends: 16573 [2021-07-13 20:08:54,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10182 ImplicationChecksByTransitivity, 3267.0ms TimeCoverageRelationStatistics Valid=4084, Invalid=23972, Unknown=0, NotChecked=0, Total=28056 [2021-07-13 20:08:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2021-07-13 20:08:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 5289. [2021-07-13 20:08:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 5288 states have (on average 2.440998487140696) internal successors, (12908), 5288 states have internal predecessors, (12908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 12908 transitions. [2021-07-13 20:08:54,917 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 12908 transitions. Word has length 51 [2021-07-13 20:08:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:54,917 INFO L482 AbstractCegarLoop]: Abstraction has 5289 states and 12908 transitions. [2021-07-13 20:08:54,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 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) [2021-07-13 20:08:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 12908 transitions. [2021-07-13 20:08:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:54,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:54,922 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:55,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-13 20:08:55,122 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1111204943, now seen corresponding path program 71 times [2021-07-13 20:08:55,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:55,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114479727] [2021-07-13 20:08:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:55,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:55,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114479727] [2021-07-13 20:08:55,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114479727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:55,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984760607] [2021-07-13 20:08:55,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:55,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 20:08:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:55,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:08:55,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:55,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984760607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:55,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:55,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-07-13 20:08:55,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729736002] [2021-07-13 20:08:55,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:08:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:08:55,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:08:55,846 INFO L87 Difference]: Start difference. First operand 5289 states and 12908 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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) [2021-07-13 20:08:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:59,483 INFO L93 Difference]: Finished difference Result 18875 states and 42539 transitions. [2021-07-13 20:08:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-13 20:08:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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 51 [2021-07-13 20:08:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:59,509 INFO L225 Difference]: With dead ends: 18875 [2021-07-13 20:08:59,509 INFO L226 Difference]: Without dead ends: 18587 [2021-07-13 20:08:59,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9833 ImplicationChecksByTransitivity, 2957.4ms TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-07-13 20:08:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18587 states. [2021-07-13 20:08:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18587 to 5317. [2021-07-13 20:08:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5316 states have (on average 2.438675696012039) internal successors, (12964), 5316 states have internal predecessors, (12964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 12964 transitions. [2021-07-13 20:08:59,632 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 12964 transitions. Word has length 51 [2021-07-13 20:08:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:59,632 INFO L482 AbstractCegarLoop]: Abstraction has 5317 states and 12964 transitions. [2021-07-13 20:08:59,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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) [2021-07-13 20:08:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 12964 transitions. [2021-07-13 20:08:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:08:59,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:59,636 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:59,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:59,837 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash -547770827, now seen corresponding path program 72 times [2021-07-13 20:08:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:59,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70067013] [2021-07-13 20:08:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:00,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:00,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70067013] [2021-07-13 20:09:00,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70067013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:00,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220480090] [2021-07-13 20:09:00,027 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 [2021-07-13 20:09:00,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 20:09:00,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:00,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:09:00,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:00,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220480090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:00,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:00,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-07-13 20:09:00,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692856886] [2021-07-13 20:09:00,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:09:00,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:00,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:09:00,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:09:00,590 INFO L87 Difference]: Start difference. First operand 5317 states and 12964 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) [2021-07-13 20:09:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:04,469 INFO L93 Difference]: Finished difference Result 16588 states and 36726 transitions. [2021-07-13 20:09:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-07-13 20:09:04,470 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 51 [2021-07-13 20:09:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:04,490 INFO L225 Difference]: With dead ends: 16588 [2021-07-13 20:09:04,490 INFO L226 Difference]: Without dead ends: 16174 [2021-07-13 20:09:04,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12160 ImplicationChecksByTransitivity, 3295.1ms TimeCoverageRelationStatistics Valid=5931, Invalid=25575, Unknown=0, NotChecked=0, Total=31506 [2021-07-13 20:09:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2021-07-13 20:09:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 5337. [2021-07-13 20:09:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 2.437031484257871) internal successors, (13004), 5336 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 13004 transitions. [2021-07-13 20:09:04,592 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 13004 transitions. Word has length 51 [2021-07-13 20:09:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:04,592 INFO L482 AbstractCegarLoop]: Abstraction has 5337 states and 13004 transitions. [2021-07-13 20:09:04,592 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) [2021-07-13 20:09:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 13004 transitions. [2021-07-13 20:09:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:09:04,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:04,596 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:04,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:04,797 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:04,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1021996473, now seen corresponding path program 73 times [2021-07-13 20:09:04,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:04,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797529015] [2021-07-13 20:09:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:04,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:04,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797529015] [2021-07-13 20:09:04,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797529015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:04,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727502826] [2021-07-13 20:09:04,997 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 [2021-07-13 20:09:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:09:05,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:05,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727502826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:05,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:05,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-07-13 20:09:05,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412426903] [2021-07-13 20:09:05,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:09:05,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:09:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:09:05,509 INFO L87 Difference]: Start difference. First operand 5337 states and 13004 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) [2021-07-13 20:09:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:09,006 INFO L93 Difference]: Finished difference Result 16800 states and 38164 transitions. [2021-07-13 20:09:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-07-13 20:09:09,006 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 51 [2021-07-13 20:09:09,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:09,027 INFO L225 Difference]: With dead ends: 16800 [2021-07-13 20:09:09,027 INFO L226 Difference]: Without dead ends: 16146 [2021-07-13 20:09:09,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 3094.5ms TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-07-13 20:09:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2021-07-13 20:09:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 4803. [2021-07-13 20:09:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 2.4123281965847565) internal successors, (11584), 4802 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 11584 transitions. [2021-07-13 20:09:09,136 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 11584 transitions. Word has length 51 [2021-07-13 20:09:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:09,136 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 11584 transitions. [2021-07-13 20:09:09,136 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) [2021-07-13 20:09:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 11584 transitions. [2021-07-13 20:09:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:09,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:09,140 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:09,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:09,340 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:09,341 INFO L82 PathProgramCache]: Analyzing trace with hash -607302967, now seen corresponding path program 74 times [2021-07-13 20:09:09,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:09,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393559384] [2021-07-13 20:09:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:09,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:09,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393559384] [2021-07-13 20:09:09,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393559384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:09,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983654380] [2021-07-13 20:09:09,550 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 [2021-07-13 20:09:09,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:09,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:09:09,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:10,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983654380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:10,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:10,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-07-13 20:09:10,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753511862] [2021-07-13 20:09:10,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:09:10,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:10,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:09:10,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:09:10,128 INFO L87 Difference]: Start difference. First operand 4803 states and 11584 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:14,223 INFO L93 Difference]: Finished difference Result 6738 states and 15323 transitions. [2021-07-13 20:09:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-07-13 20:09:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:09:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:14,231 INFO L225 Difference]: With dead ends: 6738 [2021-07-13 20:09:14,231 INFO L226 Difference]: Without dead ends: 6426 [2021-07-13 20:09:14,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 3724.4ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-07-13 20:09:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-07-13 20:09:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 4802. [2021-07-13 20:09:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409289731305978) internal successors, (11567), 4801 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11567 transitions. [2021-07-13 20:09:14,289 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11567 transitions. Word has length 53 [2021-07-13 20:09:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:14,289 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11567 transitions. [2021-07-13 20:09:14,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11567 transitions. [2021-07-13 20:09:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 20:09:14,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:14,294 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:14,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:14,509 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1343145563, now seen corresponding path program 75 times [2021-07-13 20:09:14,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:14,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579900399] [2021-07-13 20:09:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:14,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579900399] [2021-07-13 20:09:14,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579900399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:14,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678868403] [2021-07-13 20:09:14,621 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 [2021-07-13 20:09:14,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 20:09:14,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:14,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:09:14,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:15,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678868403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:15,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:15,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-07-13 20:09:15,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975282557] [2021-07-13 20:09:15,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:09:15,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:15,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:09:15,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:09:15,197 INFO L87 Difference]: Start difference. First operand 4802 states and 11567 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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) [2021-07-13 20:09:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:22,138 INFO L93 Difference]: Finished difference Result 6316 states and 14547 transitions. [2021-07-13 20:09:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-07-13 20:09:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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 53 [2021-07-13 20:09:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:22,145 INFO L225 Difference]: With dead ends: 6316 [2021-07-13 20:09:22,145 INFO L226 Difference]: Without dead ends: 6312 [2021-07-13 20:09:22,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 6534.0ms TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-07-13 20:09:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-07-13 20:09:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 4802. [2021-07-13 20:09:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409081441366382) internal successors, (11566), 4801 states have internal predecessors, (11566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11566 transitions. [2021-07-13 20:09:22,199 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11566 transitions. Word has length 53 [2021-07-13 20:09:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:22,200 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11566 transitions. [2021-07-13 20:09:22,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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) [2021-07-13 20:09:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11566 transitions. [2021-07-13 20:09:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:09:22,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:22,204 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:22,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:22,404 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash -425284857, now seen corresponding path program 76 times [2021-07-13 20:09:22,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:22,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669435041] [2021-07-13 20:09:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:22,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669435041] [2021-07-13 20:09:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669435041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647621567] [2021-07-13 20:09:22,515 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 [2021-07-13 20:09:22,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:22,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:22,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:09:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:22,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647621567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:22,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:22,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 20:09:22,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961744654] [2021-07-13 20:09:22,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:09:22,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:22,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:09:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:09:22,622 INFO L87 Difference]: Start difference. First operand 4802 states and 11566 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:22,775 INFO L93 Difference]: Finished difference Result 6109 states and 14541 transitions. [2021-07-13 20:09:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:09:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-13 20:09:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:22,782 INFO L225 Difference]: With dead ends: 6109 [2021-07-13 20:09:22,782 INFO L226 Difference]: Without dead ends: 6034 [2021-07-13 20:09:22,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:09:22,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2021-07-13 20:09:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5577. [2021-07-13 20:09:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5576 states have (on average 2.438307030129125) internal successors, (13596), 5576 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 13596 transitions. [2021-07-13 20:09:22,866 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 13596 transitions. Word has length 55 [2021-07-13 20:09:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:22,866 INFO L482 AbstractCegarLoop]: Abstraction has 5577 states and 13596 transitions. [2021-07-13 20:09:22,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 13596 transitions. [2021-07-13 20:09:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:09:22,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:22,870 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:23,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:23,071 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1144269145, now seen corresponding path program 77 times [2021-07-13 20:09:23,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:23,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417242518] [2021-07-13 20:09:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:23,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:23,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417242518] [2021-07-13 20:09:23,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417242518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:23,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974238252] [2021-07-13 20:09:23,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:09:23,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 20:09:23,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 20:09:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:24,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974238252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:24,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:24,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-07-13 20:09:24,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415428096] [2021-07-13 20:09:24,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 20:09:24,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 20:09:24,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:09:24,132 INFO L87 Difference]: Start difference. First operand 5577 states and 13596 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:28,324 INFO L93 Difference]: Finished difference Result 7325 states and 17131 transitions. [2021-07-13 20:09:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:09:28,324 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:09:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:28,334 INFO L225 Difference]: With dead ends: 7325 [2021-07-13 20:09:28,334 INFO L226 Difference]: Without dead ends: 7319 [2021-07-13 20:09:28,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 3019.2ms TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:09:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2021-07-13 20:09:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 5539. [2021-07-13 20:09:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 5538 states have (on average 2.438605994944023) internal successors, (13505), 5538 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 13505 transitions. [2021-07-13 20:09:28,402 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 13505 transitions. Word has length 55 [2021-07-13 20:09:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:28,402 INFO L482 AbstractCegarLoop]: Abstraction has 5539 states and 13505 transitions. [2021-07-13 20:09:28,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 13505 transitions. [2021-07-13 20:09:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:09:28,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:28,407 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:28,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-07-13 20:09:28,607 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:28,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1722012963, now seen corresponding path program 78 times [2021-07-13 20:09:28,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:28,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763442844] [2021-07-13 20:09:28,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:28,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:28,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763442844] [2021-07-13 20:09:28,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763442844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:28,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620750553] [2021-07-13 20:09:28,815 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 [2021-07-13 20:09:28,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 20:09:28,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:09:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:29,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620750553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:29,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:29,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-07-13 20:09:29,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895679616] [2021-07-13 20:09:29,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:09:29,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:29,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:09:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:09:29,444 INFO L87 Difference]: Start difference. First operand 5539 states and 13505 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:35,158 INFO L93 Difference]: Finished difference Result 10773 states and 24488 transitions. [2021-07-13 20:09:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-13 20:09:35,159 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:09:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:35,171 INFO L225 Difference]: With dead ends: 10773 [2021-07-13 20:09:35,171 INFO L226 Difference]: Without dead ends: 10749 [2021-07-13 20:09:35,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 3338.8ms TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-07-13 20:09:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-07-13 20:09:35,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 5893. [2021-07-13 20:09:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 2.4414460285132384) internal successors, (14385), 5892 states have internal predecessors, (14385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 14385 transitions. [2021-07-13 20:09:35,247 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 14385 transitions. Word has length 55 [2021-07-13 20:09:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:35,247 INFO L482 AbstractCegarLoop]: Abstraction has 5893 states and 14385 transitions. [2021-07-13 20:09:35,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 14385 transitions. [2021-07-13 20:09:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:09:35,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:35,251 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:35,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:35,451 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1842588423, now seen corresponding path program 79 times [2021-07-13 20:09:35,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:35,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049309133] [2021-07-13 20:09:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:35,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:35,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049309133] [2021-07-13 20:09:35,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049309133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:35,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432520558] [2021-07-13 20:09:35,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:09:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:35,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:09:35,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:36,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432520558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:36,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:36,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-07-13 20:09:36,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705337555] [2021-07-13 20:09:36,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:09:36,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:09:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:09:36,264 INFO L87 Difference]: Start difference. First operand 5893 states and 14385 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:40,395 INFO L93 Difference]: Finished difference Result 8165 states and 19006 transitions. [2021-07-13 20:09:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-13 20:09:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:09:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:40,405 INFO L225 Difference]: With dead ends: 8165 [2021-07-13 20:09:40,405 INFO L226 Difference]: Without dead ends: 8161 [2021-07-13 20:09:40,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 2807.2ms TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-07-13 20:09:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-07-13 20:09:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 5628. [2021-07-13 20:09:40,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5627 states have (on average 2.438955038208637) internal successors, (13724), 5627 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 13724 transitions. [2021-07-13 20:09:40,485 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 13724 transitions. Word has length 55 [2021-07-13 20:09:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:40,485 INFO L482 AbstractCegarLoop]: Abstraction has 5628 states and 13724 transitions. [2021-07-13 20:09:40,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 13724 transitions. [2021-07-13 20:09:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:09:40,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:40,489 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:40,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:40,690 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:40,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1694161249, now seen corresponding path program 80 times [2021-07-13 20:09:40,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:40,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831515148] [2021-07-13 20:09:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:40,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:40,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831515148] [2021-07-13 20:09:40,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831515148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:40,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077968576] [2021-07-13 20:09:40,870 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 [2021-07-13 20:09:40,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:40,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:40,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:09:40,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:41,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077968576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:41,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:41,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-07-13 20:09:41,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568738330] [2021-07-13 20:09:41,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:09:41,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:41,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:09:41,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:09:41,489 INFO L87 Difference]: Start difference. First operand 5628 states and 13724 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:47,780 INFO L93 Difference]: Finished difference Result 12946 states and 29248 transitions. [2021-07-13 20:09:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-07-13 20:09:47,781 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:09:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:47,799 INFO L225 Difference]: With dead ends: 12946 [2021-07-13 20:09:47,799 INFO L226 Difference]: Without dead ends: 12898 [2021-07-13 20:09:47,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 4157.4ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-07-13 20:09:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2021-07-13 20:09:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 5600. [2021-07-13 20:09:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 2.4365065190212536) internal successors, (13642), 5599 states have internal predecessors, (13642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 13642 transitions. [2021-07-13 20:09:47,897 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 13642 transitions. Word has length 55 [2021-07-13 20:09:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:47,897 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 13642 transitions. [2021-07-13 20:09:47,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 13642 transitions. [2021-07-13 20:09:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:09:47,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:47,902 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:48,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-13 20:09:48,102 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:48,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:48,102 INFO L82 PathProgramCache]: Analyzing trace with hash 661255397, now seen corresponding path program 81 times [2021-07-13 20:09:48,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:48,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677275923] [2021-07-13 20:09:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:48,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:48,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677275923] [2021-07-13 20:09:48,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677275923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:48,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733098533] [2021-07-13 20:09:48,313 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 [2021-07-13 20:09:48,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 20:09:48,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:09:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:48,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733098533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:48,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:48,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2021-07-13 20:09:48,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51221532] [2021-07-13 20:09:48,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:09:48,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:48,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:09:48,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:09:48,928 INFO L87 Difference]: Start difference. First operand 5600 states and 13642 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:55,430 INFO L93 Difference]: Finished difference Result 14970 states and 33594 transitions. [2021-07-13 20:09:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-07-13 20:09:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:09:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:55,451 INFO L225 Difference]: With dead ends: 14970 [2021-07-13 20:09:55,452 INFO L226 Difference]: Without dead ends: 14892 [2021-07-13 20:09:55,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16664 ImplicationChecksByTransitivity, 4705.4ms TimeCoverageRelationStatistics Valid=5098, Invalid=40058, Unknown=0, NotChecked=0, Total=45156 [2021-07-13 20:09:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-07-13 20:09:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 5524. [2021-07-13 20:09:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4349085641861308) internal successors, (13448), 5523 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13448 transitions. [2021-07-13 20:09:55,593 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13448 transitions. Word has length 55 [2021-07-13 20:09:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:55,593 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13448 transitions. [2021-07-13 20:09:55,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13448 transitions. [2021-07-13 20:09:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:09:55,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:55,597 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:55,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:55,797 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1592574615, now seen corresponding path program 82 times [2021-07-13 20:09:55,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:55,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495846725] [2021-07-13 20:09:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:55,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495846725] [2021-07-13 20:09:55,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495846725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743720733] [2021-07-13 20:09:55,986 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:56,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:56,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:09:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:56,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743720733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:56,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:56,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-07-13 20:09:56,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631585605] [2021-07-13 20:09:56,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:09:56,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:56,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:09:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:09:56,571 INFO L87 Difference]: Start difference. First operand 5524 states and 13448 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:02,317 INFO L93 Difference]: Finished difference Result 18186 states and 40794 transitions. [2021-07-13 20:10:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-07-13 20:10:02,318 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:10:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:02,343 INFO L225 Difference]: With dead ends: 18186 [2021-07-13 20:10:02,343 INFO L226 Difference]: Without dead ends: 18072 [2021-07-13 20:10:02,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15389 ImplicationChecksByTransitivity, 4268.7ms TimeCoverageRelationStatistics Valid=5445, Invalid=35967, Unknown=0, NotChecked=0, Total=41412 [2021-07-13 20:10:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18072 states. [2021-07-13 20:10:02,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18072 to 5412. [2021-07-13 20:10:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.4405839955645905) internal successors, (13206), 5411 states have internal predecessors, (13206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 13206 transitions. [2021-07-13 20:10:02,465 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 13206 transitions. Word has length 55 [2021-07-13 20:10:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:02,465 INFO L482 AbstractCegarLoop]: Abstraction has 5412 states and 13206 transitions. [2021-07-13 20:10:02,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 13206 transitions. [2021-07-13 20:10:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:10:02,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:02,469 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:02,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-13 20:10:02,669 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:02,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1315992301, now seen corresponding path program 83 times [2021-07-13 20:10:02,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:02,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644104842] [2021-07-13 20:10:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:02,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:02,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644104842] [2021-07-13 20:10:02,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644104842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:02,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148663380] [2021-07-13 20:10:02,861 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:02,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 20:10:02,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:02,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:10:02,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:03,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148663380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:03,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:03,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 47 [2021-07-13 20:10:03,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822886794] [2021-07-13 20:10:03,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:10:03,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:03,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:10:03,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:10:03,472 INFO L87 Difference]: Start difference. First operand 5412 states and 13206 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:07,666 INFO L93 Difference]: Finished difference Result 19113 states and 42468 transitions. [2021-07-13 20:10:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-07-13 20:10:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:10:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:07,692 INFO L225 Difference]: With dead ends: 19113 [2021-07-13 20:10:07,692 INFO L226 Difference]: Without dead ends: 18873 [2021-07-13 20:10:07,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 3288.7ms TimeCoverageRelationStatistics Valid=4545, Invalid=24867, Unknown=0, NotChecked=0, Total=29412 [2021-07-13 20:10:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2021-07-13 20:10:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 5360. [2021-07-13 20:10:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 2.4448591155066244) internal successors, (13102), 5359 states have internal predecessors, (13102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 13102 transitions. [2021-07-13 20:10:07,809 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 13102 transitions. Word has length 55 [2021-07-13 20:10:07,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:07,809 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 13102 transitions. [2021-07-13 20:10:07,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 13102 transitions. [2021-07-13 20:10:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:10:07,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:07,813 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:08,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-07-13 20:10:08,014 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash -469019279, now seen corresponding path program 84 times [2021-07-13 20:10:08,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:08,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803900197] [2021-07-13 20:10:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:08,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803900197] [2021-07-13 20:10:08,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803900197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802891486] [2021-07-13 20:10:08,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:08,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 20:10:08,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:10:08,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:08,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802891486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:08,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:08,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-07-13 20:10:08,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468575244] [2021-07-13 20:10:08,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-07-13 20:10:08,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:08,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-07-13 20:10:08,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:10:08,845 INFO L87 Difference]: Start difference. First operand 5360 states and 13102 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:13,268 INFO L93 Difference]: Finished difference Result 18758 states and 41177 transitions. [2021-07-13 20:10:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-07-13 20:10:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:10:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:13,296 INFO L225 Difference]: With dead ends: 18758 [2021-07-13 20:10:13,296 INFO L226 Difference]: Without dead ends: 18353 [2021-07-13 20:10:13,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14275 ImplicationChecksByTransitivity, 3643.8ms TimeCoverageRelationStatistics Valid=6292, Invalid=30380, Unknown=0, NotChecked=0, Total=36672 [2021-07-13 20:10:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-07-13 20:10:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5380. [2021-07-13 20:10:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 2.443205056701989) internal successors, (13142), 5379 states have internal predecessors, (13142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 13142 transitions. [2021-07-13 20:10:13,435 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 13142 transitions. Word has length 55 [2021-07-13 20:10:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:13,435 INFO L482 AbstractCegarLoop]: Abstraction has 5380 states and 13142 transitions. [2021-07-13 20:10:13,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 13142 transitions. [2021-07-13 20:10:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:10:13,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:13,439 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:13,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-07-13 20:10:13,640 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:13,640 INFO L82 PathProgramCache]: Analyzing trace with hash -897735435, now seen corresponding path program 85 times [2021-07-13 20:10:13,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:13,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855649250] [2021-07-13 20:10:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:13,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:13,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855649250] [2021-07-13 20:10:13,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855649250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:13,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798144519] [2021-07-13 20:10:13,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:10:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:14,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798144519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:14,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:14,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-07-13 20:10:14,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506000279] [2021-07-13 20:10:14,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-07-13 20:10:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-07-13 20:10:14,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:10:14,527 INFO L87 Difference]: Start difference. First operand 5380 states and 13142 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:18,846 INFO L93 Difference]: Finished difference Result 18854 states and 41231 transitions. [2021-07-13 20:10:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-07-13 20:10:18,846 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:10:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:18,871 INFO L225 Difference]: With dead ends: 18854 [2021-07-13 20:10:18,871 INFO L226 Difference]: Without dead ends: 18251 [2021-07-13 20:10:18,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 3728.1ms TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-07-13 20:10:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18251 states. [2021-07-13 20:10:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18251 to 5392. [2021-07-13 20:10:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 2.4422185123353737) internal successors, (13166), 5391 states have internal predecessors, (13166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 13166 transitions. [2021-07-13 20:10:18,992 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 13166 transitions. Word has length 55 [2021-07-13 20:10:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:18,992 INFO L482 AbstractCegarLoop]: Abstraction has 5392 states and 13166 transitions. [2021-07-13 20:10:18,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 13166 transitions. [2021-07-13 20:10:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:10:18,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:18,996 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:19,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:19,197 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:19,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1703861895, now seen corresponding path program 86 times [2021-07-13 20:10:19,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:19,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295133322] [2021-07-13 20:10:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:19,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:19,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295133322] [2021-07-13 20:10:19,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295133322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:19,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317751387] [2021-07-13 20:10:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:19,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:19,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:10:19,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:20,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317751387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:20,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:20,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-07-13 20:10:20,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810586800] [2021-07-13 20:10:20,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 20:10:20,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:20,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 20:10:20,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:10:20,047 INFO L87 Difference]: Start difference. First operand 5392 states and 13166 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:24,285 INFO L93 Difference]: Finished difference Result 15764 states and 34786 transitions. [2021-07-13 20:10:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-07-13 20:10:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:10:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:24,302 INFO L225 Difference]: With dead ends: 15764 [2021-07-13 20:10:24,303 INFO L226 Difference]: Without dead ends: 14963 [2021-07-13 20:10:24,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13296 ImplicationChecksByTransitivity, 3782.4ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-07-13 20:10:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14963 states. [2021-07-13 20:10:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14963 to 5551. [2021-07-13 20:10:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 2.4086486486486485) internal successors, (13368), 5550 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 13368 transitions. [2021-07-13 20:10:24,396 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 13368 transitions. Word has length 55 [2021-07-13 20:10:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:24,396 INFO L482 AbstractCegarLoop]: Abstraction has 5551 states and 13368 transitions. [2021-07-13 20:10:24,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 13368 transitions. [2021-07-13 20:10:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:10:24,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:24,400 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:24,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-07-13 20:10:24,601 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash 335036743, now seen corresponding path program 87 times [2021-07-13 20:10:24,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:24,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204312144] [2021-07-13 20:10:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:24,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:24,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204312144] [2021-07-13 20:10:24,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204312144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:24,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465370777] [2021-07-13 20:10:24,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:24,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 20:10:24,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:24,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:10:24,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:25,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465370777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:25,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:25,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-07-13 20:10:25,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808976045] [2021-07-13 20:10:25,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:10:25,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:10:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:10:25,328 INFO L87 Difference]: Start difference. First operand 5551 states and 13368 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:32,494 INFO L93 Difference]: Finished difference Result 11259 states and 25238 transitions. [2021-07-13 20:10:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-07-13 20:10:32,495 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:10:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:32,507 INFO L225 Difference]: With dead ends: 11259 [2021-07-13 20:10:32,507 INFO L226 Difference]: Without dead ends: 11255 [2021-07-13 20:10:32,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32929 ImplicationChecksByTransitivity, 6570.3ms TimeCoverageRelationStatistics Valid=15649, Invalid=58063, Unknown=0, NotChecked=0, Total=73712 [2021-07-13 20:10:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2021-07-13 20:10:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 5626. [2021-07-13 20:10:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5625 states have (on average 2.4208) internal successors, (13617), 5625 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 13617 transitions. [2021-07-13 20:10:32,597 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 13617 transitions. Word has length 55 [2021-07-13 20:10:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:32,597 INFO L482 AbstractCegarLoop]: Abstraction has 5626 states and 13617 transitions. [2021-07-13 20:10:32,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 13617 transitions. [2021-07-13 20:10:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 20:10:32,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:32,602 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:32,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-13 20:10:32,803 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:32,803 INFO L82 PathProgramCache]: Analyzing trace with hash 317372549, now seen corresponding path program 88 times [2021-07-13 20:10:32,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:32,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592507390] [2021-07-13 20:10:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:33,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:33,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592507390] [2021-07-13 20:10:33,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592507390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:33,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737996137] [2021-07-13 20:10:33,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:33,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:33,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:33,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:10:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:33,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737996137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:33,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:33,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-07-13 20:10:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327301090] [2021-07-13 20:10:33,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-07-13 20:10:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:33,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-07-13 20:10:33,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:10:33,756 INFO L87 Difference]: Start difference. First operand 5626 states and 13617 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:39,570 INFO L93 Difference]: Finished difference Result 7916 states and 18052 transitions. [2021-07-13 20:10:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-07-13 20:10:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:10:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:39,580 INFO L225 Difference]: With dead ends: 7916 [2021-07-13 20:10:39,581 INFO L226 Difference]: Without dead ends: 7538 [2021-07-13 20:10:39,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18266 ImplicationChecksByTransitivity, 5194.9ms TimeCoverageRelationStatistics Valid=12509, Invalid=34797, Unknown=0, NotChecked=0, Total=47306 [2021-07-13 20:10:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-07-13 20:10:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 5623. [2021-07-13 20:10:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.418000711490573) internal successors, (13594), 5622 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13594 transitions. [2021-07-13 20:10:39,650 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13594 transitions. Word has length 57 [2021-07-13 20:10:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:39,650 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13594 transitions. [2021-07-13 20:10:39,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13594 transitions. [2021-07-13 20:10:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 20:10:39,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:39,655 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:39,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:39,870 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1117608869, now seen corresponding path program 89 times [2021-07-13 20:10:39,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:39,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215460382] [2021-07-13 20:10:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:40,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:40,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215460382] [2021-07-13 20:10:40,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215460382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:40,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027061232] [2021-07-13 20:10:40,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:40,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 20:10:40,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:40,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:10:40,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027061232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:40,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:40,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2021-07-13 20:10:40,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120157235] [2021-07-13 20:10:40,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:10:40,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:10:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:10:40,747 INFO L87 Difference]: Start difference. First operand 5623 states and 13594 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:49,171 INFO L93 Difference]: Finished difference Result 7450 states and 17196 transitions. [2021-07-13 20:10:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-07-13 20:10:49,171 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:10:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:49,179 INFO L225 Difference]: With dead ends: 7450 [2021-07-13 20:10:49,179 INFO L226 Difference]: Without dead ends: 7446 [2021-07-13 20:10:49,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46028 ImplicationChecksByTransitivity, 7912.9ms TimeCoverageRelationStatistics Valid=21517, Invalid=78023, Unknown=0, NotChecked=0, Total=99540 [2021-07-13 20:10:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7446 states. [2021-07-13 20:10:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7446 to 5623. [2021-07-13 20:10:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.4178228388473855) internal successors, (13593), 5622 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13593 transitions. [2021-07-13 20:10:49,238 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13593 transitions. Word has length 57 [2021-07-13 20:10:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:49,239 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13593 transitions. [2021-07-13 20:10:49,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13593 transitions. [2021-07-13 20:10:49,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:49,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:49,243 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:49,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,443 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:49,443 INFO L82 PathProgramCache]: Analyzing trace with hash -870344253, now seen corresponding path program 90 times [2021-07-13 20:10:49,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:49,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118516332] [2021-07-13 20:10:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:49,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:49,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118516332] [2021-07-13 20:10:49,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118516332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:49,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364716009] [2021-07-13 20:10:49,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 20:10:49,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:49,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:10:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:49,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364716009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:49,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:49,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 25 [2021-07-13 20:10:49,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375366726] [2021-07-13 20:10:49,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:10:49,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:49,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:10:49,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:10:49,838 INFO L87 Difference]: Start difference. First operand 5623 states and 13593 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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) [2021-07-13 20:10:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:50,097 INFO L93 Difference]: Finished difference Result 7171 states and 17073 transitions. [2021-07-13 20:10:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:10:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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 59 [2021-07-13 20:10:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:50,106 INFO L225 Difference]: With dead ends: 7171 [2021-07-13 20:10:50,106 INFO L226 Difference]: Without dead ends: 7081 [2021-07-13 20:10:50,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:10:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-07-13 20:10:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6483. [2021-07-13 20:10:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 2.4438444924406046) internal successors, (15841), 6482 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 15841 transitions. [2021-07-13 20:10:50,177 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 15841 transitions. Word has length 59 [2021-07-13 20:10:50,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:50,177 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 15841 transitions. [2021-07-13 20:10:50,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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) [2021-07-13 20:10:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 15841 transitions. [2021-07-13 20:10:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:50,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:50,182 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:50,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:50,382 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1705145369, now seen corresponding path program 91 times [2021-07-13 20:10:50,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:50,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548257168] [2021-07-13 20:10:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:50,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:50,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548257168] [2021-07-13 20:10:50,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548257168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:50,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400877433] [2021-07-13 20:10:50,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:50,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-13 20:10:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:51,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400877433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:51,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:51,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2021-07-13 20:10:51,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890762409] [2021-07-13 20:10:51,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:10:51,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:51,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:10:51,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:10:51,326 INFO L87 Difference]: Start difference. First operand 6483 states and 15841 transitions. Second operand has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 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) [2021-07-13 20:10:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:57,355 INFO L93 Difference]: Finished difference Result 12343 states and 28098 transitions. [2021-07-13 20:10:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-07-13 20:10:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 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) Word has length 59 [2021-07-13 20:10:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:57,370 INFO L225 Difference]: With dead ends: 12343 [2021-07-13 20:10:57,371 INFO L226 Difference]: Without dead ends: 12319 [2021-07-13 20:10:57,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10309 ImplicationChecksByTransitivity, 3896.9ms TimeCoverageRelationStatistics Valid=2449, Invalid=28351, Unknown=0, NotChecked=0, Total=30800 [2021-07-13 20:10:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2021-07-13 20:10:57,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 6755. [2021-07-13 20:10:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.447290494521765) internal successors, (16529), 6754 states have internal predecessors, (16529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 16529 transitions. [2021-07-13 20:10:57,467 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 16529 transitions. Word has length 59 [2021-07-13 20:10:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:57,467 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 16529 transitions. [2021-07-13 20:10:57,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 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) [2021-07-13 20:10:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 16529 transitions. [2021-07-13 20:10:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:10:57,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:57,471 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:57,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-07-13 20:10:57,672 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash 974779459, now seen corresponding path program 92 times [2021-07-13 20:10:57,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:57,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901684152] [2021-07-13 20:10:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:57,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:57,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901684152] [2021-07-13 20:10:57,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901684152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:57,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128659864] [2021-07-13 20:10:57,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:57,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:57,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:57,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-13 20:10:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:58,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128659864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:58,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:58,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 44 [2021-07-13 20:10:58,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213701767] [2021-07-13 20:10:58,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:10:58,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:58,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:10:58,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:10:58,616 INFO L87 Difference]: Start difference. First operand 6755 states and 16529 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:03,979 INFO L93 Difference]: Finished difference Result 9269 states and 21605 transitions. [2021-07-13 20:11:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:11:03,979 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:11:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:03,989 INFO L225 Difference]: With dead ends: 9269 [2021-07-13 20:11:03,989 INFO L226 Difference]: Without dead ends: 9265 [2021-07-13 20:11:03,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6382 ImplicationChecksByTransitivity, 3298.9ms TimeCoverageRelationStatistics Valid=1733, Invalid=19147, Unknown=0, NotChecked=0, Total=20880 [2021-07-13 20:11:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-07-13 20:11:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 6473. [2021-07-13 20:11:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6473 states, 6472 states have (on average 2.4456118665018542) internal successors, (15828), 6472 states have internal predecessors, (15828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6473 states to 6473 states and 15828 transitions. [2021-07-13 20:11:04,065 INFO L78 Accepts]: Start accepts. Automaton has 6473 states and 15828 transitions. Word has length 59 [2021-07-13 20:11:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:04,065 INFO L482 AbstractCegarLoop]: Abstraction has 6473 states and 15828 transitions. [2021-07-13 20:11:04,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 6473 states and 15828 transitions. [2021-07-13 20:11:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:04,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:04,070 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:04,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:04,271 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1018344093, now seen corresponding path program 93 times [2021-07-13 20:11:04,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:04,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364049846] [2021-07-13 20:11:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:04,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:04,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364049846] [2021-07-13 20:11:04,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364049846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:04,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492012504] [2021-07-13 20:11:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:04,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 20:11:04,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:04,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 20:11:04,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:05,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492012504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:05,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:05,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-07-13 20:11:05,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136124998] [2021-07-13 20:11:05,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:11:05,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:11:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:11:05,205 INFO L87 Difference]: Start difference. First operand 6473 states and 15828 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 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) [2021-07-13 20:11:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:13,607 INFO L93 Difference]: Finished difference Result 14464 states and 32612 transitions. [2021-07-13 20:11:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-07-13 20:11:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 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) Word has length 59 [2021-07-13 20:11:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:13,628 INFO L225 Difference]: With dead ends: 14464 [2021-07-13 20:11:13,628 INFO L226 Difference]: Without dead ends: 14416 [2021-07-13 20:11:13,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17435 ImplicationChecksByTransitivity, 4930.2ms TimeCoverageRelationStatistics Valid=4375, Invalid=43805, Unknown=0, NotChecked=0, Total=48180 [2021-07-13 20:11:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14416 states. [2021-07-13 20:11:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14416 to 6523. [2021-07-13 20:11:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 2.4449555351119288) internal successors, (15946), 6522 states have internal predecessors, (15946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 15946 transitions. [2021-07-13 20:11:13,759 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 15946 transitions. Word has length 59 [2021-07-13 20:11:13,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:13,759 INFO L482 AbstractCegarLoop]: Abstraction has 6523 states and 15946 transitions. [2021-07-13 20:11:13,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 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) [2021-07-13 20:11:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 15946 transitions. [2021-07-13 20:11:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:13,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:13,764 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:13,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:13,964 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash -194027999, now seen corresponding path program 94 times [2021-07-13 20:11:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:13,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401159443] [2021-07-13 20:11:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:14,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:14,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401159443] [2021-07-13 20:11:14,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401159443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:14,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227368221] [2021-07-13 20:11:14,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:14,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:14,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:14,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 20:11:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:14,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227368221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:14,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:14,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2021-07-13 20:11:14,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681510704] [2021-07-13 20:11:14,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:11:14,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:11:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:11:14,883 INFO L87 Difference]: Start difference. First operand 6523 states and 15946 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 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) [2021-07-13 20:11:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:23,859 INFO L93 Difference]: Finished difference Result 17210 states and 38597 transitions. [2021-07-13 20:11:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-07-13 20:11:23,860 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 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) Word has length 59 [2021-07-13 20:11:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:23,881 INFO L225 Difference]: With dead ends: 17210 [2021-07-13 20:11:23,881 INFO L226 Difference]: Without dead ends: 17132 [2021-07-13 20:11:23,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22220 ImplicationChecksByTransitivity, 5828.2ms TimeCoverageRelationStatistics Valid=6045, Invalid=53247, Unknown=0, NotChecked=0, Total=59292 [2021-07-13 20:11:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2021-07-13 20:11:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 6424. [2021-07-13 20:11:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6424 states, 6423 states have (on average 2.4406040790907677) internal successors, (15676), 6423 states have internal predecessors, (15676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 15676 transitions. [2021-07-13 20:11:24,004 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 15676 transitions. Word has length 59 [2021-07-13 20:11:24,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:24,004 INFO L482 AbstractCegarLoop]: Abstraction has 6424 states and 15676 transitions. [2021-07-13 20:11:24,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 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) [2021-07-13 20:11:24,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 15676 transitions. [2021-07-13 20:11:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:24,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:24,009 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:24,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:24,225 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1178744485, now seen corresponding path program 95 times [2021-07-13 20:11:24,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:24,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352980561] [2021-07-13 20:11:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:24,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:24,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352980561] [2021-07-13 20:11:24,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352980561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:24,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084232596] [2021-07-13 20:11:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:24,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-13 20:11:24,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:24,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 20:11:24,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:25,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084232596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:25,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:25,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 49 [2021-07-13 20:11:25,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813983292] [2021-07-13 20:11:25,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 20:11:25,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 20:11:25,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:11:25,285 INFO L87 Difference]: Start difference. First operand 6424 states and 15676 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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) [2021-07-13 20:11:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:33,364 INFO L93 Difference]: Finished difference Result 19569 states and 43599 transitions. [2021-07-13 20:11:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-07-13 20:11:33,365 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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) Word has length 59 [2021-07-13 20:11:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:33,390 INFO L225 Difference]: With dead ends: 19569 [2021-07-13 20:11:33,390 INFO L226 Difference]: Without dead ends: 19455 [2021-07-13 20:11:33,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22978 ImplicationChecksByTransitivity, 5855.1ms TimeCoverageRelationStatistics Valid=7134, Invalid=52646, Unknown=0, NotChecked=0, Total=59780 [2021-07-13 20:11:33,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19455 states. [2021-07-13 20:11:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19455 to 6298. [2021-07-13 20:11:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6298 states, 6297 states have (on average 2.4427505161187866) internal successors, (15382), 6297 states have internal predecessors, (15382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 15382 transitions. [2021-07-13 20:11:33,528 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 15382 transitions. Word has length 59 [2021-07-13 20:11:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:33,528 INFO L482 AbstractCegarLoop]: Abstraction has 6298 states and 15382 transitions. [2021-07-13 20:11:33,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 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) [2021-07-13 20:11:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 15382 transitions. [2021-07-13 20:11:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:33,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:33,533 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:33,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:33,734 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:33,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:33,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1738865705, now seen corresponding path program 96 times [2021-07-13 20:11:33,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:33,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385934218] [2021-07-13 20:11:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:34,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:34,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385934218] [2021-07-13 20:11:34,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385934218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:34,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048426104] [2021-07-13 20:11:34,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:34,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-13 20:11:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:34,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:34,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048426104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:34,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:34,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2021-07-13 20:11:34,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899959179] [2021-07-13 20:11:34,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:11:34,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:11:34,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:11:34,710 INFO L87 Difference]: Start difference. First operand 6298 states and 15382 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 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) [2021-07-13 20:11:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:40,749 INFO L93 Difference]: Finished difference Result 22986 states and 51049 transitions. [2021-07-13 20:11:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-07-13 20:11:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 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) Word has length 59 [2021-07-13 20:11:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:40,782 INFO L225 Difference]: With dead ends: 22986 [2021-07-13 20:11:40,783 INFO L226 Difference]: Without dead ends: 22683 [2021-07-13 20:11:40,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17310 ImplicationChecksByTransitivity, 4549.1ms TimeCoverageRelationStatistics Valid=6385, Invalid=38771, Unknown=0, NotChecked=0, Total=45156 [2021-07-13 20:11:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22683 states. [2021-07-13 20:11:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22683 to 5441. [2021-07-13 20:11:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 2.4193014705882354) internal successors, (13161), 5440 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 13161 transitions. [2021-07-13 20:11:40,944 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 13161 transitions. Word has length 59 [2021-07-13 20:11:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:40,944 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 13161 transitions. [2021-07-13 20:11:40,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 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) [2021-07-13 20:11:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 13161 transitions. [2021-07-13 20:11:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:40,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:40,949 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:41,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-07-13 20:11:41,149 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2044629331, now seen corresponding path program 97 times [2021-07-13 20:11:41,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:41,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498850547] [2021-07-13 20:11:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:41,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:41,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498850547] [2021-07-13 20:11:41,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498850547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:41,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589932619] [2021-07-13 20:11:41,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:41,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:11:41,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:42,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589932619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:42,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:42,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-07-13 20:11:42,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067020954] [2021-07-13 20:11:42,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:11:42,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:11:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:11:42,025 INFO L87 Difference]: Start difference. First operand 5441 states and 13161 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 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) [2021-07-13 20:11:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:46,984 INFO L93 Difference]: Finished difference Result 22758 states and 49665 transitions. [2021-07-13 20:11:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-07-13 20:11:46,985 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 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) Word has length 59 [2021-07-13 20:11:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:47,016 INFO L225 Difference]: With dead ends: 22758 [2021-07-13 20:11:47,016 INFO L226 Difference]: Without dead ends: 22332 [2021-07-13 20:11:47,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14328 ImplicationChecksByTransitivity, 3917.3ms TimeCoverageRelationStatistics Valid=5883, Invalid=32337, Unknown=0, NotChecked=0, Total=38220 [2021-07-13 20:11:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2021-07-13 20:11:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 5465. [2021-07-13 20:11:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 5464 states have (on average 2.417459736456808) internal successors, (13209), 5464 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 13209 transitions. [2021-07-13 20:11:47,162 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 13209 transitions. Word has length 59 [2021-07-13 20:11:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:47,162 INFO L482 AbstractCegarLoop]: Abstraction has 5465 states and 13209 transitions. [2021-07-13 20:11:47,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 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) [2021-07-13 20:11:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 13209 transitions. [2021-07-13 20:11:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:47,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:47,166 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:47,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:47,367 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:47,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1129401905, now seen corresponding path program 98 times [2021-07-13 20:11:47,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:47,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352938671] [2021-07-13 20:11:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:47,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352938671] [2021-07-13 20:11:47,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352938671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:47,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454087053] [2021-07-13 20:11:47,616 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:47,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:47,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:47,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:11:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:48,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454087053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:48,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:48,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2021-07-13 20:11:48,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328132064] [2021-07-13 20:11:48,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-07-13 20:11:48,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:48,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-07-13 20:11:48,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:11:48,324 INFO L87 Difference]: Start difference. First operand 5465 states and 13209 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 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) [2021-07-13 20:11:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:53,690 INFO L93 Difference]: Finished difference Result 22040 states and 47868 transitions. [2021-07-13 20:11:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-07-13 20:11:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 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) Word has length 59 [2021-07-13 20:11:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:53,720 INFO L225 Difference]: With dead ends: 22040 [2021-07-13 20:11:53,720 INFO L226 Difference]: Without dead ends: 21506 [2021-07-13 20:11:53,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19899 ImplicationChecksByTransitivity, 4567.3ms TimeCoverageRelationStatistics Valid=8757, Invalid=41195, Unknown=0, NotChecked=0, Total=49952 [2021-07-13 20:11:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21506 states. [2021-07-13 20:11:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21506 to 5481. [2021-07-13 20:11:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 2.4162408759124085) internal successors, (13241), 5480 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 13241 transitions. [2021-07-13 20:11:53,873 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 13241 transitions. Word has length 59 [2021-07-13 20:11:53,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:53,873 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 13241 transitions. [2021-07-13 20:11:53,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 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) [2021-07-13 20:11:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 13241 transitions. [2021-07-13 20:11:53,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:11:53,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:53,877 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:54,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:54,078 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash 819878581, now seen corresponding path program 99 times [2021-07-13 20:11:54,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:54,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643582889] [2021-07-13 20:11:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:54,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:54,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643582889] [2021-07-13 20:11:54,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643582889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:54,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596919998] [2021-07-13 20:11:54,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:54,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 20:11:54,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:54,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:11:54,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:55,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596919998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:55,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:55,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2021-07-13 20:11:55,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135323118] [2021-07-13 20:11:55,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 20:11:55,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:55,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 20:11:55,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:11:55,033 INFO L87 Difference]: Start difference. First operand 5481 states and 13241 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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) [2021-07-13 20:12:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:00,860 INFO L93 Difference]: Finished difference Result 19025 states and 40337 transitions. [2021-07-13 20:12:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-07-13 20:12:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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) Word has length 59 [2021-07-13 20:12:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:00,884 INFO L225 Difference]: With dead ends: 19025 [2021-07-13 20:12:00,884 INFO L226 Difference]: Without dead ends: 18353 [2021-07-13 20:12:00,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23147 ImplicationChecksByTransitivity, 4956.7ms TimeCoverageRelationStatistics Valid=11132, Invalid=46228, Unknown=0, NotChecked=0, Total=57360 [2021-07-13 20:12:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-07-13 20:12:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5493. [2021-07-13 20:12:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.415331391114348) internal successors, (13265), 5492 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 13265 transitions. [2021-07-13 20:12:01,028 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 13265 transitions. Word has length 59 [2021-07-13 20:12:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:01,028 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 13265 transitions. [2021-07-13 20:12:01,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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) [2021-07-13 20:12:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 13265 transitions. [2021-07-13 20:12:01,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:12:01,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:01,032 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:01,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-07-13 20:12:01,232 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1283609657, now seen corresponding path program 100 times [2021-07-13 20:12:01,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:01,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424134507] [2021-07-13 20:12:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:01,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:01,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424134507] [2021-07-13 20:12:01,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424134507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:01,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113793016] [2021-07-13 20:12:01,494 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:01,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:01,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:12:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:02,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113793016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:02,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:02,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-07-13 20:12:02,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711950059] [2021-07-13 20:12:02,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 20:12:02,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:02,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 20:12:02,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:12:02,154 INFO L87 Difference]: Start difference. First operand 5493 states and 13265 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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) [2021-07-13 20:12:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:07,574 INFO L93 Difference]: Finished difference Result 17796 states and 38889 transitions. [2021-07-13 20:12:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-07-13 20:12:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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) Word has length 59 [2021-07-13 20:12:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:07,596 INFO L225 Difference]: With dead ends: 17796 [2021-07-13 20:12:07,597 INFO L226 Difference]: Without dead ends: 16833 [2021-07-13 20:12:07,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18178 ImplicationChecksByTransitivity, 4814.0ms TimeCoverageRelationStatistics Valid=10369, Invalid=38693, Unknown=0, NotChecked=0, Total=49062 [2021-07-13 20:12:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16833 states. [2021-07-13 20:12:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16833 to 5659. [2021-07-13 20:12:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.376458112407211) internal successors, (13446), 5658 states have internal predecessors, (13446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 13446 transitions. [2021-07-13 20:12:07,713 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 13446 transitions. Word has length 59 [2021-07-13 20:12:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:07,713 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 13446 transitions. [2021-07-13 20:12:07,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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) [2021-07-13 20:12:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 13446 transitions. [2021-07-13 20:12:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:12:07,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:07,717 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:07,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-13 20:12:07,918 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:07,918 INFO L82 PathProgramCache]: Analyzing trace with hash -994946229, now seen corresponding path program 101 times [2021-07-13 20:12:07,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:07,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096548962] [2021-07-13 20:12:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:08,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:08,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096548962] [2021-07-13 20:12:08,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096548962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:08,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466665695] [2021-07-13 20:12:08,057 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:08,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 20:12:08,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:08,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:12:08,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:08,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466665695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:08,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:08,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-07-13 20:12:08,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920542546] [2021-07-13 20:12:08,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:12:08,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:12:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:12:08,710 INFO L87 Difference]: Start difference. First operand 5659 states and 13446 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:17,507 INFO L93 Difference]: Finished difference Result 12575 states and 27866 transitions. [2021-07-13 20:12:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-07-13 20:12:17,507 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:12:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:17,524 INFO L225 Difference]: With dead ends: 12575 [2021-07-13 20:12:17,524 INFO L226 Difference]: Without dead ends: 12571 [2021-07-13 20:12:17,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46972 ImplicationChecksByTransitivity, 8057.0ms TimeCoverageRelationStatistics Valid=21531, Invalid=80549, Unknown=0, NotChecked=0, Total=102080 [2021-07-13 20:12:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12571 states. [2021-07-13 20:12:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12571 to 5767. [2021-07-13 20:12:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 2.392126257370794) internal successors, (13793), 5766 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 13793 transitions. [2021-07-13 20:12:17,644 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 13793 transitions. Word has length 59 [2021-07-13 20:12:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:17,644 INFO L482 AbstractCegarLoop]: Abstraction has 5767 states and 13793 transitions. [2021-07-13 20:12:17,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 13793 transitions. [2021-07-13 20:12:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 20:12:17,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:17,648 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:17,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:17,850 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash -192628671, now seen corresponding path program 102 times [2021-07-13 20:12:17,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:17,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150813304] [2021-07-13 20:12:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:18,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:18,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150813304] [2021-07-13 20:12:18,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150813304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:18,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741315619] [2021-07-13 20:12:18,127 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:18,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 20:12:18,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:18,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:12:18,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:18,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741315619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:18,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:18,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-07-13 20:12:18,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633461746] [2021-07-13 20:12:18,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-07-13 20:12:18,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-07-13 20:12:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2528, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:12:18,899 INFO L87 Difference]: Start difference. First operand 5767 states and 13793 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:25,132 INFO L93 Difference]: Finished difference Result 8440 states and 18980 transitions. [2021-07-13 20:12:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-07-13 20:12:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:12:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:25,142 INFO L225 Difference]: With dead ends: 8440 [2021-07-13 20:12:25,142 INFO L226 Difference]: Without dead ends: 7990 [2021-07-13 20:12:25,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24730 ImplicationChecksByTransitivity, 5606.0ms TimeCoverageRelationStatistics Valid=16440, Invalid=45312, Unknown=0, NotChecked=0, Total=61752 [2021-07-13 20:12:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-07-13 20:12:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 5762. [2021-07-13 20:12:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 2.389168547127235) internal successors, (13764), 5761 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 13764 transitions. [2021-07-13 20:12:25,209 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 13764 transitions. Word has length 61 [2021-07-13 20:12:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:25,209 INFO L482 AbstractCegarLoop]: Abstraction has 5762 states and 13764 transitions. [2021-07-13 20:12:25,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 13764 transitions. [2021-07-13 20:12:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 20:12:25,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:25,214 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:25,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:25,415 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash 559420251, now seen corresponding path program 103 times [2021-07-13 20:12:25,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:25,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359816982] [2021-07-13 20:12:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:25,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:25,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359816982] [2021-07-13 20:12:25,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359816982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:25,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330403699] [2021-07-13 20:12:25,553 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:12:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:26,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330403699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:26,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:26,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28] total 42 [2021-07-13 20:12:26,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726536849] [2021-07-13 20:12:26,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:26,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:26,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:26,199 INFO L87 Difference]: Start difference. First operand 5762 states and 13764 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 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) [2021-07-13 20:12:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:31,738 INFO L93 Difference]: Finished difference Result 7544 states and 17272 transitions. [2021-07-13 20:12:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-07-13 20:12:31,739 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 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) Word has length 61 [2021-07-13 20:12:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:31,747 INFO L225 Difference]: With dead ends: 7544 [2021-07-13 20:12:31,747 INFO L226 Difference]: Without dead ends: 7540 [2021-07-13 20:12:31,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23464 ImplicationChecksByTransitivity, 5261.1ms TimeCoverageRelationStatistics Valid=12941, Invalid=42519, Unknown=0, NotChecked=0, Total=55460 [2021-07-13 20:12:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2021-07-13 20:12:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 5718. [2021-07-13 20:12:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.391988805317474) internal successors, (13675), 5717 states have internal predecessors, (13675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 13675 transitions. [2021-07-13 20:12:31,812 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 13675 transitions. Word has length 61 [2021-07-13 20:12:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:31,812 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 13675 transitions. [2021-07-13 20:12:31,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 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) [2021-07-13 20:12:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 13675 transitions. [2021-07-13 20:12:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 20:12:31,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:31,816 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:32,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-07-13 20:12:32,017 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1867745943, now seen corresponding path program 104 times [2021-07-13 20:12:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:32,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106746052] [2021-07-13 20:12:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:12:32,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:32,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106746052] [2021-07-13 20:12:32,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106746052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:32,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916411035] [2021-07-13 20:12:32,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:32,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:32,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-13 20:12:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:32,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916411035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:32,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:32,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-07-13 20:12:32,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396204506] [2021-07-13 20:12:32,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:12:32,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:32,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:12:32,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:12:32,806 INFO L87 Difference]: Start difference. First operand 5718 states and 13675 transitions. Second operand has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:36,152 INFO L93 Difference]: Finished difference Result 12090 states and 27556 transitions. [2021-07-13 20:12:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:12:36,152 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:12:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:36,167 INFO L225 Difference]: With dead ends: 12090 [2021-07-13 20:12:36,167 INFO L226 Difference]: Without dead ends: 12081 [2021-07-13 20:12:36,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5212 ImplicationChecksByTransitivity, 2525.5ms TimeCoverageRelationStatistics Valid=2862, Invalid=14694, Unknown=0, NotChecked=0, Total=17556 [2021-07-13 20:12:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2021-07-13 20:12:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 7235. [2021-07-13 20:12:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 2.380702239424938) internal successors, (17222), 7234 states have internal predecessors, (17222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 17222 transitions. [2021-07-13 20:12:36,270 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 17222 transitions. Word has length 61 [2021-07-13 20:12:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:36,270 INFO L482 AbstractCegarLoop]: Abstraction has 7235 states and 17222 transitions. [2021-07-13 20:12:36,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 17222 transitions. [2021-07-13 20:12:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:12:36,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:36,278 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:36,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-13 20:12:36,478 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1355244929, now seen corresponding path program 105 times [2021-07-13 20:12:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:36,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965611925] [2021-07-13 20:12:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:36,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:36,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965611925] [2021-07-13 20:12:36,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965611925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:36,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671306627] [2021-07-13 20:12:36,616 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:36,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 20:12:36,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:36,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:12:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 25 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:36,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671306627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:36,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:36,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 23 [2021-07-13 20:12:36,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560097525] [2021-07-13 20:12:36,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:12:36,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:36,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:12:36,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:12:36,840 INFO L87 Difference]: Start difference. First operand 7235 states and 17222 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) [2021-07-13 20:12:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:37,108 INFO L93 Difference]: Finished difference Result 9195 states and 21714 transitions. [2021-07-13 20:12:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:12:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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 63 [2021-07-13 20:12:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:37,121 INFO L225 Difference]: With dead ends: 9195 [2021-07-13 20:12:37,121 INFO L226 Difference]: Without dead ends: 9102 [2021-07-13 20:12:37,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:12:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9102 states. [2021-07-13 20:12:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9102 to 8338. [2021-07-13 20:12:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 2.408900083963056) internal successors, (20083), 8337 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 20083 transitions. [2021-07-13 20:12:37,224 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 20083 transitions. Word has length 63 [2021-07-13 20:12:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:37,225 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 20083 transitions. [2021-07-13 20:12:37,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 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) [2021-07-13 20:12:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 20083 transitions. [2021-07-13 20:12:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:12:37,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:37,233 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:37,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:37,449 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:37,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2045530241, now seen corresponding path program 106 times [2021-07-13 20:12:37,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:37,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741781225] [2021-07-13 20:12:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:37,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:37,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741781225] [2021-07-13 20:12:37,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741781225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:37,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134571674] [2021-07-13 20:12:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:37,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:37,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:37,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-07-13 20:12:37,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:38,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134571674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:38,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:38,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30] total 47 [2021-07-13 20:12:38,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639769203] [2021-07-13 20:12:38,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:12:38,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:38,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:12:38,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:12:38,719 INFO L87 Difference]: Start difference. First operand 8338 states and 20083 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:46,506 INFO L93 Difference]: Finished difference Result 11486 states and 26531 transitions. [2021-07-13 20:12:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-07-13 20:12:46,507 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:12:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:46,521 INFO L225 Difference]: With dead ends: 11486 [2021-07-13 20:12:46,521 INFO L226 Difference]: Without dead ends: 11482 [2021-07-13 20:12:46,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8732 ImplicationChecksByTransitivity, 4459.9ms TimeCoverageRelationStatistics Valid=2129, Invalid=25593, Unknown=0, NotChecked=0, Total=27722 [2021-07-13 20:12:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-07-13 20:12:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 8616. [2021-07-13 20:12:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8616 states, 8615 states have (on average 2.4174114915844456) internal successors, (20826), 8615 states have internal predecessors, (20826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8616 states to 8616 states and 20826 transitions. [2021-07-13 20:12:46,634 INFO L78 Accepts]: Start accepts. Automaton has 8616 states and 20826 transitions. Word has length 63 [2021-07-13 20:12:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:46,634 INFO L482 AbstractCegarLoop]: Abstraction has 8616 states and 20826 transitions. [2021-07-13 20:12:46,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8616 states and 20826 transitions. [2021-07-13 20:12:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:12:46,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:46,643 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:46,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:46,843 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2113535449, now seen corresponding path program 107 times [2021-07-13 20:12:46,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:46,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95011480] [2021-07-13 20:12:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:47,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:47,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95011480] [2021-07-13 20:12:47,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95011480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:47,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521043683] [2021-07-13 20:12:47,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:47,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 20:12:47,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-13 20:12:47,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:47,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521043683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:47,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:47,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 50 [2021-07-13 20:12:47,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415554750] [2021-07-13 20:12:47,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:12:47,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:47,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:12:47,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:12:47,920 INFO L87 Difference]: Start difference. First operand 8616 states and 20826 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:57,344 INFO L93 Difference]: Finished difference Result 18453 states and 41420 transitions. [2021-07-13 20:12:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-07-13 20:12:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:12:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:57,369 INFO L225 Difference]: With dead ends: 18453 [2021-07-13 20:12:57,370 INFO L226 Difference]: Without dead ends: 18405 [2021-07-13 20:12:57,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22263 ImplicationChecksByTransitivity, 6015.2ms TimeCoverageRelationStatistics Valid=5109, Invalid=55161, Unknown=0, NotChecked=0, Total=60270 [2021-07-13 20:12:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-07-13 20:12:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 8296. [2021-07-13 20:12:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8296 states, 8295 states have (on average 2.4176009644364074) internal successors, (20054), 8295 states have internal predecessors, (20054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8296 states to 8296 states and 20054 transitions. [2021-07-13 20:12:57,550 INFO L78 Accepts]: Start accepts. Automaton has 8296 states and 20054 transitions. Word has length 63 [2021-07-13 20:12:57,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:57,550 INFO L482 AbstractCegarLoop]: Abstraction has 8296 states and 20054 transitions. [2021-07-13 20:12:57,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 8296 states and 20054 transitions. [2021-07-13 20:12:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:12:57,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:57,559 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:57,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-13 20:12:57,759 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash 232798557, now seen corresponding path program 108 times [2021-07-13 20:12:57,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:57,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436310869] [2021-07-13 20:12:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:57,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436310869] [2021-07-13 20:12:57,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436310869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907427189] [2021-07-13 20:12:57,991 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:58,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-13 20:12:58,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:12:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:58,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907427189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:58,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:58,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2021-07-13 20:12:58,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666794586] [2021-07-13 20:12:58,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:12:58,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:58,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:12:58,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2297, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:12:58,783 INFO L87 Difference]: Start difference. First operand 8296 states and 20054 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:09,438 INFO L93 Difference]: Finished difference Result 20814 states and 46375 transitions. [2021-07-13 20:13:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-07-13 20:13:09,438 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:13:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:09,466 INFO L225 Difference]: With dead ends: 20814 [2021-07-13 20:13:09,466 INFO L226 Difference]: Without dead ends: 20736 [2021-07-13 20:13:09,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28610 ImplicationChecksByTransitivity, 6810.8ms TimeCoverageRelationStatistics Valid=6992, Invalid=68358, Unknown=0, NotChecked=0, Total=75350 [2021-07-13 20:13:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20736 states. [2021-07-13 20:13:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20736 to 8280. [2021-07-13 20:13:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 2.4179248701534) internal successors, (20018), 8279 states have internal predecessors, (20018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 20018 transitions. [2021-07-13 20:13:09,634 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 20018 transitions. Word has length 63 [2021-07-13 20:13:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:09,635 INFO L482 AbstractCegarLoop]: Abstraction has 8280 states and 20018 transitions. [2021-07-13 20:13:09,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 20018 transitions. [2021-07-13 20:13:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:13:09,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:09,643 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:09,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:09,844 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:09,844 INFO L82 PathProgramCache]: Analyzing trace with hash -742874655, now seen corresponding path program 109 times [2021-07-13 20:13:09,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:09,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133136211] [2021-07-13 20:13:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:10,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:10,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133136211] [2021-07-13 20:13:10,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133136211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:10,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818744396] [2021-07-13 20:13:10,080 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-13 20:13:10,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:10,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818744396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:10,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:10,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 51 [2021-07-13 20:13:10,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899783133] [2021-07-13 20:13:10,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-07-13 20:13:10,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:10,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-07-13 20:13:10,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:13:10,876 INFO L87 Difference]: Start difference. First operand 8280 states and 20018 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:20,550 INFO L93 Difference]: Finished difference Result 23395 states and 51906 transitions. [2021-07-13 20:13:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2021-07-13 20:13:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:13:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:20,581 INFO L225 Difference]: With dead ends: 23395 [2021-07-13 20:13:20,581 INFO L226 Difference]: Without dead ends: 23281 [2021-07-13 20:13:20,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31036 ImplicationChecksByTransitivity, 6878.9ms TimeCoverageRelationStatistics Valid=8486, Invalid=71886, Unknown=0, NotChecked=0, Total=80372 [2021-07-13 20:13:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23281 states. [2021-07-13 20:13:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23281 to 8204. [2021-07-13 20:13:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 2.4183835182250397) internal successors, (19838), 8203 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 19838 transitions. [2021-07-13 20:13:20,751 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 19838 transitions. Word has length 63 [2021-07-13 20:13:20,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:20,751 INFO L482 AbstractCegarLoop]: Abstraction has 8204 states and 19838 transitions. [2021-07-13 20:13:20,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 19838 transitions. [2021-07-13 20:13:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:13:20,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:20,758 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:20,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-13 20:13:20,959 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2113730405, now seen corresponding path program 110 times [2021-07-13 20:13:20,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:20,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184302479] [2021-07-13 20:13:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:21,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184302479] [2021-07-13 20:13:21,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184302479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359672708] [2021-07-13 20:13:21,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:21,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:13:21,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359672708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:21,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 52 [2021-07-13 20:13:21,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961309178] [2021-07-13 20:13:21,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-07-13 20:13:21,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:21,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-07-13 20:13:21,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:13:21,954 INFO L87 Difference]: Start difference. First operand 8204 states and 19838 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:30,235 INFO L93 Difference]: Finished difference Result 26465 states and 58445 transitions. [2021-07-13 20:13:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-07-13 20:13:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:13:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:30,271 INFO L225 Difference]: With dead ends: 26465 [2021-07-13 20:13:30,272 INFO L226 Difference]: Without dead ends: 26309 [2021-07-13 20:13:30,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26772 ImplicationChecksByTransitivity, 6001.7ms TimeCoverageRelationStatistics Valid=8589, Invalid=60843, Unknown=0, NotChecked=0, Total=69432 [2021-07-13 20:13:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26309 states. [2021-07-13 20:13:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26309 to 8152. [2021-07-13 20:13:30,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8151 states have (on average 2.4210526315789473) internal successors, (19734), 8151 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 19734 transitions. [2021-07-13 20:13:30,451 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 19734 transitions. Word has length 63 [2021-07-13 20:13:30,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:30,451 INFO L482 AbstractCegarLoop]: Abstraction has 8152 states and 19734 transitions. [2021-07-13 20:13:30,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 19734 transitions. [2021-07-13 20:13:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:13:30,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:30,461 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:30,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:30,669 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1932982761, now seen corresponding path program 111 times [2021-07-13 20:13:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:30,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968007603] [2021-07-13 20:13:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:30,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:30,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968007603] [2021-07-13 20:13:30,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968007603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:30,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936816879] [2021-07-13 20:13:30,949 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:31,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-13 20:13:31,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:31,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:13:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:31,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936816879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:31,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:31,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 53 [2021-07-13 20:13:31,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467433687] [2021-07-13 20:13:31,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 20:13:31,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:31,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 20:13:31,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:13:31,875 INFO L87 Difference]: Start difference. First operand 8152 states and 19734 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:38,262 INFO L93 Difference]: Finished difference Result 29047 states and 63963 transitions. [2021-07-13 20:13:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-07-13 20:13:38,262 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:13:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:38,305 INFO L225 Difference]: With dead ends: 29047 [2021-07-13 20:13:38,305 INFO L226 Difference]: Without dead ends: 28687 [2021-07-13 20:13:38,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16150 ImplicationChecksByTransitivity, 4975.2ms TimeCoverageRelationStatistics Valid=6194, Invalid=36862, Unknown=0, NotChecked=0, Total=43056 [2021-07-13 20:13:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2021-07-13 20:13:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 8192. [2021-07-13 20:13:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8191 states have (on average 2.418996459528751) internal successors, (19814), 8191 states have internal predecessors, (19814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 19814 transitions. [2021-07-13 20:13:38,511 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 19814 transitions. Word has length 63 [2021-07-13 20:13:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:38,511 INFO L482 AbstractCegarLoop]: Abstraction has 8192 states and 19814 transitions. [2021-07-13 20:13:38,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 19814 transitions. [2021-07-13 20:13:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:13:38,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:38,518 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:38,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-07-13 20:13:38,719 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1308649837, now seen corresponding path program 112 times [2021-07-13 20:13:38,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:38,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413843170] [2021-07-13 20:13:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:38,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:38,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413843170] [2021-07-13 20:13:38,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413843170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:38,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170702370] [2021-07-13 20:13:38,973 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:39,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:39,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:39,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:13:39,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:39,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170702370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:39,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:39,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2021-07-13 20:13:39,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303717509] [2021-07-13 20:13:39,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-07-13 20:13:39,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:39,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-07-13 20:13:39,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:13:39,770 INFO L87 Difference]: Start difference. First operand 8192 states and 19814 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:45,651 INFO L93 Difference]: Finished difference Result 29747 states and 65287 transitions. [2021-07-13 20:13:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-07-13 20:13:45,651 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:13:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:45,693 INFO L225 Difference]: With dead ends: 29747 [2021-07-13 20:13:45,693 INFO L226 Difference]: Without dead ends: 29174 [2021-07-13 20:13:45,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19920 ImplicationChecksByTransitivity, 4841.0ms TimeCoverageRelationStatistics Valid=8171, Invalid=43585, Unknown=0, NotChecked=0, Total=51756 [2021-07-13 20:13:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29174 states. [2021-07-13 20:13:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29174 to 8224. [2021-07-13 20:13:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8224 states, 8223 states have (on average 2.417365924844947) internal successors, (19878), 8223 states have internal predecessors, (19878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8224 states to 8224 states and 19878 transitions. [2021-07-13 20:13:45,893 INFO L78 Accepts]: Start accepts. Automaton has 8224 states and 19878 transitions. Word has length 63 [2021-07-13 20:13:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:45,893 INFO L482 AbstractCegarLoop]: Abstraction has 8224 states and 19878 transitions. [2021-07-13 20:13:45,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 8224 states and 19878 transitions. [2021-07-13 20:13:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:13:45,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:45,901 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:46,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 20:13:46,102 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:46,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1493370353, now seen corresponding path program 113 times [2021-07-13 20:13:46,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:46,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961067158] [2021-07-13 20:13:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:46,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:46,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961067158] [2021-07-13 20:13:46,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961067158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:46,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160909496] [2021-07-13 20:13:46,370 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:46,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 20:13:46,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:46,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:13:46,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160909496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:47,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2021-07-13 20:13:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011649483] [2021-07-13 20:13:47,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-13 20:13:47,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-13 20:13:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:13:47,152 INFO L87 Difference]: Start difference. First operand 8224 states and 19878 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:54,148 INFO L93 Difference]: Finished difference Result 28419 states and 62099 transitions. [2021-07-13 20:13:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-07-13 20:13:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:13:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:54,185 INFO L225 Difference]: With dead ends: 28419 [2021-07-13 20:13:54,185 INFO L226 Difference]: Without dead ends: 27744 [2021-07-13 20:13:54,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26898 ImplicationChecksByTransitivity, 5771.2ms TimeCoverageRelationStatistics Valid=11861, Invalid=54445, Unknown=0, NotChecked=0, Total=66306 [2021-07-13 20:13:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2021-07-13 20:13:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 8248. [2021-07-13 20:13:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8248 states, 8247 states have (on average 2.4161513277555473) internal successors, (19926), 8247 states have internal predecessors, (19926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8248 states to 8248 states and 19926 transitions. [2021-07-13 20:13:54,368 INFO L78 Accepts]: Start accepts. Automaton has 8248 states and 19926 transitions. Word has length 63 [2021-07-13 20:13:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:54,369 INFO L482 AbstractCegarLoop]: Abstraction has 8248 states and 19926 transitions. [2021-07-13 20:13:54,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 8248 states and 19926 transitions. [2021-07-13 20:13:54,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:13:54,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:54,376 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:54,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:54,591 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash 184061813, now seen corresponding path program 114 times [2021-07-13 20:13:54,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:54,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540231011] [2021-07-13 20:13:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:55,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:55,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540231011] [2021-07-13 20:13:55,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540231011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:55,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960891785] [2021-07-13 20:13:55,005 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:55,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 20:13:55,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:13:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:55,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960891785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:55,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:55,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-07-13 20:13:55,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988591110] [2021-07-13 20:13:55,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-13 20:13:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-13 20:13:55,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2768, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:13:55,901 INFO L87 Difference]: Start difference. First operand 8248 states and 19926 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:02,834 INFO L93 Difference]: Finished difference Result 27835 states and 60645 transitions. [2021-07-13 20:14:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-07-13 20:14:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:14:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:02,869 INFO L225 Difference]: With dead ends: 27835 [2021-07-13 20:14:02,870 INFO L226 Difference]: Without dead ends: 26926 [2021-07-13 20:14:02,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 5966.8ms TimeCoverageRelationStatistics Valid=12784, Invalid=52496, Unknown=0, NotChecked=0, Total=65280 [2021-07-13 20:14:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-07-13 20:14:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 8264. [2021-07-13 20:14:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8264 states, 8263 states have (on average 2.4153455161563597) internal successors, (19958), 8263 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:03,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8264 states to 8264 states and 19958 transitions. [2021-07-13 20:14:03,050 INFO L78 Accepts]: Start accepts. Automaton has 8264 states and 19958 transitions. Word has length 63 [2021-07-13 20:14:03,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:03,050 INFO L482 AbstractCegarLoop]: Abstraction has 8264 states and 19958 transitions. [2021-07-13 20:14:03,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8264 states and 19958 transitions. [2021-07-13 20:14:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:14:03,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:03,057 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:03,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:03,258 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:03,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2102737415, now seen corresponding path program 115 times [2021-07-13 20:14:03,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:03,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560668627] [2021-07-13 20:14:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:03,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:03,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560668627] [2021-07-13 20:14:03,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560668627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:03,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590577343] [2021-07-13 20:14:03,557 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:03,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:14:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:04,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590577343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:04,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:04,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-07-13 20:14:04,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366778639] [2021-07-13 20:14:04,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-07-13 20:14:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:04,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-07-13 20:14:04,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:14:04,426 INFO L87 Difference]: Start difference. First operand 8264 states and 19958 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:11,864 INFO L93 Difference]: Finished difference Result 25077 states and 55934 transitions. [2021-07-13 20:14:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-07-13 20:14:11,864 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:14:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:11,895 INFO L225 Difference]: With dead ends: 25077 [2021-07-13 20:14:11,895 INFO L226 Difference]: Without dead ends: 24000 [2021-07-13 20:14:11,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29595 ImplicationChecksByTransitivity, 6640.4ms TimeCoverageRelationStatistics Valid=15969, Invalid=59931, Unknown=0, NotChecked=0, Total=75900 [2021-07-13 20:14:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24000 states. [2021-07-13 20:14:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24000 to 8860. [2021-07-13 20:14:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8859 states have (on average 2.3754374082853595) internal successors, (21044), 8859 states have internal predecessors, (21044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 21044 transitions. [2021-07-13 20:14:12,114 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 21044 transitions. Word has length 63 [2021-07-13 20:14:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:12,114 INFO L482 AbstractCegarLoop]: Abstraction has 8860 states and 21044 transitions. [2021-07-13 20:14:12,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 21044 transitions. [2021-07-13 20:14:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:14:12,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:12,123 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:12,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-07-13 20:14:12,324 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:12,324 INFO L82 PathProgramCache]: Analyzing trace with hash 248636239, now seen corresponding path program 116 times [2021-07-13 20:14:12,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:12,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055929431] [2021-07-13 20:14:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:12,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:12,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055929431] [2021-07-13 20:14:12,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055929431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:12,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042268996] [2021-07-13 20:14:12,477 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:12,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:12,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:12,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:14:12,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:13,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042268996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:13,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:13,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 46 [2021-07-13 20:14:13,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866318031] [2021-07-13 20:14:13,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:13,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:13,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:13,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:13,186 INFO L87 Difference]: Start difference. First operand 8860 states and 21044 transitions. Second operand has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:24,205 INFO L93 Difference]: Finished difference Result 18047 states and 40389 transitions. [2021-07-13 20:14:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2021-07-13 20:14:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:14:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:24,228 INFO L225 Difference]: With dead ends: 18047 [2021-07-13 20:14:24,228 INFO L226 Difference]: Without dead ends: 18043 [2021-07-13 20:14:24,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65131 ImplicationChecksByTransitivity, 10018.0ms TimeCoverageRelationStatistics Valid=28937, Invalid=109075, Unknown=0, NotChecked=0, Total=138012 [2021-07-13 20:14:24,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18043 states. [2021-07-13 20:14:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18043 to 9034. [2021-07-13 20:14:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9034 states, 9033 states have (on average 2.3871360566810584) internal successors, (21563), 9033 states have internal predecessors, (21563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9034 states to 9034 states and 21563 transitions. [2021-07-13 20:14:24,373 INFO L78 Accepts]: Start accepts. Automaton has 9034 states and 21563 transitions. Word has length 63 [2021-07-13 20:14:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:24,373 INFO L482 AbstractCegarLoop]: Abstraction has 9034 states and 21563 transitions. [2021-07-13 20:14:24,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9034 states and 21563 transitions. [2021-07-13 20:14:24,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:14:24,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:24,382 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:24,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:24,593 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash -892450307, now seen corresponding path program 117 times [2021-07-13 20:14:24,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:24,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646238281] [2021-07-13 20:14:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:24,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:24,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646238281] [2021-07-13 20:14:24,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646238281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:24,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095242890] [2021-07-13 20:14:24,902 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:24,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 20:14:24,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:24,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-13 20:14:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:25,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095242890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:25,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:25,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-07-13 20:14:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148898322] [2021-07-13 20:14:25,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-13 20:14:25,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:25,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-13 20:14:25,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:14:25,820 INFO L87 Difference]: Start difference. First operand 9034 states and 21563 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:33,625 INFO L93 Difference]: Finished difference Result 12913 states and 29503 transitions. [2021-07-13 20:14:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-07-13 20:14:33,625 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:14:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:33,639 INFO L225 Difference]: With dead ends: 12913 [2021-07-13 20:14:33,639 INFO L226 Difference]: Without dead ends: 12355 [2021-07-13 20:14:33,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32726 ImplicationChecksByTransitivity, 6845.8ms TimeCoverageRelationStatistics Valid=21240, Invalid=58002, Unknown=0, NotChecked=0, Total=79242 [2021-07-13 20:14:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12355 states. [2021-07-13 20:14:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12355 to 8889. [2021-07-13 20:14:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8889 states, 8888 states have (on average 2.3834383438343836) internal successors, (21184), 8888 states have internal predecessors, (21184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 21184 transitions. [2021-07-13 20:14:33,748 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 21184 transitions. Word has length 65 [2021-07-13 20:14:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:33,748 INFO L482 AbstractCegarLoop]: Abstraction has 8889 states and 21184 transitions. [2021-07-13 20:14:33,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 21184 transitions. [2021-07-13 20:14:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:14:33,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:33,756 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:33,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:33,957 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1356747611, now seen corresponding path program 118 times [2021-07-13 20:14:33,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:33,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067352492] [2021-07-13 20:14:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:34,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067352492] [2021-07-13 20:14:34,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067352492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862043783] [2021-07-13 20:14:34,103 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:34,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:34,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:14:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:34,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862043783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:34,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:34,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30] total 45 [2021-07-13 20:14:34,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071492850] [2021-07-13 20:14:34,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 20:14:34,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 20:14:34,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:14:34,828 INFO L87 Difference]: Start difference. First operand 8889 states and 21184 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:41,558 INFO L93 Difference]: Finished difference Result 10949 states and 25244 transitions. [2021-07-13 20:14:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-07-13 20:14:41,558 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:14:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:41,570 INFO L225 Difference]: With dead ends: 10949 [2021-07-13 20:14:41,571 INFO L226 Difference]: Without dead ends: 10945 [2021-07-13 20:14:41,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31134 ImplicationChecksByTransitivity, 6348.0ms TimeCoverageRelationStatistics Valid=16708, Invalid=54848, Unknown=0, NotChecked=0, Total=71556 [2021-07-13 20:14:41,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10945 states. [2021-07-13 20:14:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10945 to 8841. [2021-07-13 20:14:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 2.3854072398190045) internal successors, (21087), 8840 states have internal predecessors, (21087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 21087 transitions. [2021-07-13 20:14:41,677 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 21087 transitions. Word has length 65 [2021-07-13 20:14:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:41,677 INFO L482 AbstractCegarLoop]: Abstraction has 8841 states and 21087 transitions. [2021-07-13 20:14:41,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 21087 transitions. [2021-07-13 20:14:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:14:41,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:41,685 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:41,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-07-13 20:14:41,886 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:41,886 INFO L82 PathProgramCache]: Analyzing trace with hash 426028347, now seen corresponding path program 119 times [2021-07-13 20:14:41,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:41,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145572078] [2021-07-13 20:14:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 1 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:42,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:42,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145572078] [2021-07-13 20:14:42,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145572078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:42,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358149358] [2021-07-13 20:14:42,048 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:42,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 20:14:42,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:14:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:42,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358149358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:42,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:42,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-13 20:14:42,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623774507] [2021-07-13 20:14:42,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:14:42,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:42,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:14:42,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:14:42,223 INFO L87 Difference]: Start difference. First operand 8841 states and 21087 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:42,452 INFO L93 Difference]: Finished difference Result 10902 states and 25809 transitions. [2021-07-13 20:14:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:14:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:14:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:42,466 INFO L225 Difference]: With dead ends: 10902 [2021-07-13 20:14:42,467 INFO L226 Difference]: Without dead ends: 10809 [2021-07-13 20:14:42,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:14:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2021-07-13 20:14:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10150. [2021-07-13 20:14:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 2.4184648733865406) internal successors, (24545), 10149 states have internal predecessors, (24545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 24545 transitions. [2021-07-13 20:14:42,598 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 24545 transitions. Word has length 67 [2021-07-13 20:14:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:42,598 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 24545 transitions. [2021-07-13 20:14:42,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 24545 transitions. [2021-07-13 20:14:42,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:14:42,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:42,608 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:42,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:42,808 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash -815506287, now seen corresponding path program 120 times [2021-07-13 20:14:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:42,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579699273] [2021-07-13 20:14:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:43,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:43,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579699273] [2021-07-13 20:14:43,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579699273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:43,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510037199] [2021-07-13 20:14:43,056 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:43,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 20:14:43,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-13 20:14:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:44,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510037199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:44,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:44,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2021-07-13 20:14:44,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143927724] [2021-07-13 20:14:44,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-07-13 20:14:44,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-07-13 20:14:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:14:44,015 INFO L87 Difference]: Start difference. First operand 10150 states and 24545 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:52,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:52,521 INFO L93 Difference]: Finished difference Result 19443 states and 44030 transitions. [2021-07-13 20:14:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-07-13 20:14:52,521 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:14:52,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:52,548 INFO L225 Difference]: With dead ends: 19443 [2021-07-13 20:14:52,548 INFO L226 Difference]: Without dead ends: 19410 [2021-07-13 20:14:52,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14672 ImplicationChecksByTransitivity, 5095.1ms TimeCoverageRelationStatistics Valid=2943, Invalid=40113, Unknown=0, NotChecked=0, Total=43056 [2021-07-13 20:14:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19410 states. [2021-07-13 20:14:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19410 to 10699. [2021-07-13 20:14:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10699 states, 10698 states have (on average 2.419798093101514) internal successors, (25887), 10698 states have internal predecessors, (25887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10699 states to 10699 states and 25887 transitions. [2021-07-13 20:14:52,726 INFO L78 Accepts]: Start accepts. Automaton has 10699 states and 25887 transitions. Word has length 67 [2021-07-13 20:14:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:52,726 INFO L482 AbstractCegarLoop]: Abstraction has 10699 states and 25887 transitions. [2021-07-13 20:14:52,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 10699 states and 25887 transitions. [2021-07-13 20:14:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:14:52,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:52,736 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:52,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:52,936 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1545872197, now seen corresponding path program 121 times [2021-07-13 20:14:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44092830] [2021-07-13 20:14:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:53,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:53,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44092830] [2021-07-13 20:14:53,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44092830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:53,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099598162] [2021-07-13 20:14:53,168 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:53,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-07-13 20:14:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:54,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099598162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:54,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:54,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32] total 50 [2021-07-13 20:14:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529676699] [2021-07-13 20:14:54,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:14:54,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:14:54,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:14:54,159 INFO L87 Difference]: Start difference. First operand 10699 states and 25887 transitions. Second operand has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:01,758 INFO L93 Difference]: Finished difference Result 13973 states and 32494 transitions. [2021-07-13 20:15:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-13 20:15:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:15:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:01,777 INFO L225 Difference]: With dead ends: 13973 [2021-07-13 20:15:01,777 INFO L226 Difference]: Without dead ends: 13969 [2021-07-13 20:15:01,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8803 ImplicationChecksByTransitivity, 4224.5ms TimeCoverageRelationStatistics Valid=2057, Invalid=26335, Unknown=0, NotChecked=0, Total=28392 [2021-07-13 20:15:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2021-07-13 20:15:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 10321. [2021-07-13 20:15:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 10320 states have (on average 2.4169573643410853) internal successors, (24943), 10320 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 24943 transitions. [2021-07-13 20:15:01,922 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 24943 transitions. Word has length 67 [2021-07-13 20:15:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:01,922 INFO L482 AbstractCegarLoop]: Abstraction has 10321 states and 24943 transitions. [2021-07-13 20:15:01,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 24943 transitions. [2021-07-13 20:15:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:15:01,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:01,933 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:02,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:02,150 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:02,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1944828693, now seen corresponding path program 122 times [2021-07-13 20:15:02,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:02,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13132756] [2021-07-13 20:15:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:02,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:02,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13132756] [2021-07-13 20:15:02,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13132756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:02,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910227143] [2021-07-13 20:15:02,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:02,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:02,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:03,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910227143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:03,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:03,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31] total 52 [2021-07-13 20:15:03,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046076654] [2021-07-13 20:15:03,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-07-13 20:15:03,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:03,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-07-13 20:15:03,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:15:03,372 INFO L87 Difference]: Start difference. First operand 10321 states and 24943 transitions. Second operand has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:13,853 INFO L93 Difference]: Finished difference Result 22051 states and 49545 transitions. [2021-07-13 20:15:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-07-13 20:15:13,853 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:15:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:13,884 INFO L225 Difference]: With dead ends: 22051 [2021-07-13 20:15:13,885 INFO L226 Difference]: Without dead ends: 22003 [2021-07-13 20:15:13,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26033 ImplicationChecksByTransitivity, 6653.5ms TimeCoverageRelationStatistics Valid=5439, Invalid=65051, Unknown=0, NotChecked=0, Total=70490 [2021-07-13 20:15:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22003 states. [2021-07-13 20:15:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22003 to 10745. [2021-07-13 20:15:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.415860014892033) internal successors, (25956), 10744 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 25956 transitions. [2021-07-13 20:15:14,113 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 25956 transitions. Word has length 67 [2021-07-13 20:15:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:14,113 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 25956 transitions. [2021-07-13 20:15:14,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 25956 transitions. [2021-07-13 20:15:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:15:14,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:14,123 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:14,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:14,324 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2010613401, now seen corresponding path program 123 times [2021-07-13 20:15:14,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:14,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344652193] [2021-07-13 20:15:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:14,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:14,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344652193] [2021-07-13 20:15:14,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344652193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:14,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985985675] [2021-07-13 20:15:14,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:14,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-07-13 20:15:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:14,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:15,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985985675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:15,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:15,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 53 [2021-07-13 20:15:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37863473] [2021-07-13 20:15:15,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 20:15:15,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:15,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 20:15:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2592, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:15:15,490 INFO L87 Difference]: Start difference. First operand 10745 states and 25956 transitions. Second operand has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:27,137 INFO L93 Difference]: Finished difference Result 25316 states and 56566 transitions. [2021-07-13 20:15:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-07-13 20:15:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:15:27,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:27,175 INFO L225 Difference]: With dead ends: 25316 [2021-07-13 20:15:27,175 INFO L226 Difference]: Without dead ends: 25238 [2021-07-13 20:15:27,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35837 ImplicationChecksByTransitivity, 8057.2ms TimeCoverageRelationStatistics Valid=7939, Invalid=85391, Unknown=0, NotChecked=0, Total=93330 [2021-07-13 20:15:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25238 states. [2021-07-13 20:15:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25238 to 10379. [2021-07-13 20:15:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 2.4208903449604935) internal successors, (25124), 10378 states have internal predecessors, (25124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 25124 transitions. [2021-07-13 20:15:27,382 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 25124 transitions. Word has length 67 [2021-07-13 20:15:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:27,382 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 25124 transitions. [2021-07-13 20:15:27,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 25124 transitions. [2021-07-13 20:15:27,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:15:27,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:27,391 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:27,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-13 20:15:27,592 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:27,592 INFO L82 PathProgramCache]: Analyzing trace with hash -963543267, now seen corresponding path program 124 times [2021-07-13 20:15:27,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:27,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081698816] [2021-07-13 20:15:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:27,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:27,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081698816] [2021-07-13 20:15:27,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081698816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:27,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434577879] [2021-07-13 20:15:27,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:27,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:27,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:27,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 70 conjunts are in the unsatisfiable core [2021-07-13 20:15:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:28,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434577879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:28,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:28,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 54 [2021-07-13 20:15:28,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792592113] [2021-07-13 20:15:28,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-07-13 20:15:28,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:28,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-07-13 20:15:28,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:15:28,743 INFO L87 Difference]: Start difference. First operand 10379 states and 25124 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:40,916 INFO L93 Difference]: Finished difference Result 28045 states and 62416 transitions. [2021-07-13 20:15:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2021-07-13 20:15:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:15:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:40,961 INFO L225 Difference]: With dead ends: 28045 [2021-07-13 20:15:40,961 INFO L226 Difference]: Without dead ends: 27931 [2021-07-13 20:15:40,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40964 ImplicationChecksByTransitivity, 8312.8ms TimeCoverageRelationStatistics Valid=10037, Invalid=94615, Unknown=0, NotChecked=0, Total=104652 [2021-07-13 20:15:40,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27931 states. [2021-07-13 20:15:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27931 to 10315. [2021-07-13 20:15:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10315 states, 10314 states have (on average 2.4203994570486715) internal successors, (24964), 10314 states have internal predecessors, (24964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 24964 transitions. [2021-07-13 20:15:41,201 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 24964 transitions. Word has length 67 [2021-07-13 20:15:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:41,201 INFO L482 AbstractCegarLoop]: Abstraction has 10315 states and 24964 transitions. [2021-07-13 20:15:41,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 24964 transitions. [2021-07-13 20:15:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:15:41,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:41,210 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:41,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:41,411 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:41,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1200841889, now seen corresponding path program 125 times [2021-07-13 20:15:41,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:41,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277176300] [2021-07-13 20:15:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:41,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:41,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277176300] [2021-07-13 20:15:41,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277176300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:41,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977027546] [2021-07-13 20:15:41,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:41,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-07-13 20:15:41,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:41,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-13 20:15:41,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:42,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977027546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:42,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:42,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 56 [2021-07-13 20:15:42,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379081255] [2021-07-13 20:15:42,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-13 20:15:42,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-13 20:15:42,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:15:42,511 INFO L87 Difference]: Start difference. First operand 10315 states and 24964 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:53,772 INFO L93 Difference]: Finished difference Result 31079 states and 68899 transitions. [2021-07-13 20:15:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-07-13 20:15:53,773 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:15:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:53,822 INFO L225 Difference]: With dead ends: 31079 [2021-07-13 20:15:53,822 INFO L226 Difference]: Without dead ends: 30923 [2021-07-13 20:15:53,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39065 ImplicationChecksByTransitivity, 7946.5ms TimeCoverageRelationStatistics Valid=11051, Invalid=87231, Unknown=0, NotChecked=0, Total=98282 [2021-07-13 20:15:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30923 states. [2021-07-13 20:15:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30923 to 10231. [2021-07-13 20:15:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10231 states, 10230 states have (on average 2.4218963831867057) internal successors, (24776), 10230 states have internal predecessors, (24776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10231 states to 10231 states and 24776 transitions. [2021-07-13 20:15:54,072 INFO L78 Accepts]: Start accepts. Automaton has 10231 states and 24776 transitions. Word has length 67 [2021-07-13 20:15:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:54,072 INFO L482 AbstractCegarLoop]: Abstraction has 10231 states and 24776 transitions. [2021-07-13 20:15:54,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10231 states and 24776 transitions. [2021-07-13 20:15:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:15:54,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:54,082 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:54,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-07-13 20:15:54,284 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1516697381, now seen corresponding path program 126 times [2021-07-13 20:15:54,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:54,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751569645] [2021-07-13 20:15:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:54,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:54,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751569645] [2021-07-13 20:15:54,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751569645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:54,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384301306] [2021-07-13 20:15:54,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:54,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-07-13 20:15:54,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:54,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-13 20:15:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:55,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384301306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:55,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:55,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 56 [2021-07-13 20:15:55,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376770266] [2021-07-13 20:15:55,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-13 20:15:55,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:55,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-13 20:15:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:15:55,459 INFO L87 Difference]: Start difference. First operand 10231 states and 24776 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:04,599 INFO L93 Difference]: Finished difference Result 35057 states and 77375 transitions. [2021-07-13 20:16:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-07-13 20:16:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:16:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:04,658 INFO L225 Difference]: With dead ends: 35057 [2021-07-13 20:16:04,658 INFO L226 Difference]: Without dead ends: 34541 [2021-07-13 20:16:04,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29483 ImplicationChecksByTransitivity, 6650.7ms TimeCoverageRelationStatistics Valid=9853, Invalid=66047, Unknown=0, NotChecked=0, Total=75900 [2021-07-13 20:16:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34541 states. [2021-07-13 20:16:04,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34541 to 10223. [2021-07-13 20:16:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10223 states, 10222 states have (on average 2.422226570142829) internal successors, (24760), 10222 states have internal predecessors, (24760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10223 states to 10223 states and 24760 transitions. [2021-07-13 20:16:04,932 INFO L78 Accepts]: Start accepts. Automaton has 10223 states and 24760 transitions. Word has length 67 [2021-07-13 20:16:04,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:04,932 INFO L482 AbstractCegarLoop]: Abstraction has 10223 states and 24760 transitions. [2021-07-13 20:16:04,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 10223 states and 24760 transitions. [2021-07-13 20:16:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:16:04,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:04,941 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:05,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-07-13 20:16:05,145 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:05,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1386608297, now seen corresponding path program 127 times [2021-07-13 20:16:05,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:05,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871381684] [2021-07-13 20:16:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:05,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871381684] [2021-07-13 20:16:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871381684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598553483] [2021-07-13 20:16:05,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 20:16:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:06,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598553483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:06,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:06,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 57 [2021-07-13 20:16:06,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432613178] [2021-07-13 20:16:06,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-13 20:16:06,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:06,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-13 20:16:06,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:16:06,294 INFO L87 Difference]: Start difference. First operand 10223 states and 24760 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:12,991 INFO L93 Difference]: Finished difference Result 37059 states and 81726 transitions. [2021-07-13 20:16:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-07-13 20:16:12,992 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:16:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:13,047 INFO L225 Difference]: With dead ends: 37059 [2021-07-13 20:16:13,047 INFO L226 Difference]: Without dead ends: 36519 [2021-07-13 20:16:13,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22513 ImplicationChecksByTransitivity, 5436.3ms TimeCoverageRelationStatistics Valid=8563, Invalid=49759, Unknown=0, NotChecked=0, Total=58322 [2021-07-13 20:16:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36519 states. [2021-07-13 20:16:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36519 to 10263. [2021-07-13 20:16:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 2.420580783473007) internal successors, (24840), 10262 states have internal predecessors, (24840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 24840 transitions. [2021-07-13 20:16:13,321 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 24840 transitions. Word has length 67 [2021-07-13 20:16:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:13,321 INFO L482 AbstractCegarLoop]: Abstraction has 10263 states and 24840 transitions. [2021-07-13 20:16:13,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 24840 transitions. [2021-07-13 20:16:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:16:13,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:13,331 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:13,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-07-13 20:16:13,531 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash -201710803, now seen corresponding path program 128 times [2021-07-13 20:16:13,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:13,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970686596] [2021-07-13 20:16:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:13,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:13,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970686596] [2021-07-13 20:16:13,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970686596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:13,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162728067] [2021-07-13 20:16:13,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:13,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:13,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:13,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:16:13,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:14,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162728067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:14,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:14,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 59 [2021-07-13 20:16:14,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36175669] [2021-07-13 20:16:14,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-13 20:16:14,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:14,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-13 20:16:14,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3118, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:16:14,719 INFO L87 Difference]: Start difference. First operand 10263 states and 24840 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:22,388 INFO L93 Difference]: Finished difference Result 36366 states and 79874 transitions. [2021-07-13 20:16:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-07-13 20:16:22,388 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:16:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:22,451 INFO L225 Difference]: With dead ends: 36366 [2021-07-13 20:16:22,451 INFO L226 Difference]: Without dead ends: 35634 [2021-07-13 20:16:22,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30002 ImplicationChecksByTransitivity, 6293.6ms TimeCoverageRelationStatistics Valid=12366, Invalid=62436, Unknown=0, NotChecked=0, Total=74802 [2021-07-13 20:16:22,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35634 states. [2021-07-13 20:16:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35634 to 10295. [2021-07-13 20:16:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10295 states, 10294 states have (on average 2.41927336312415) internal successors, (24904), 10294 states have internal predecessors, (24904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10295 states to 10295 states and 24904 transitions. [2021-07-13 20:16:22,740 INFO L78 Accepts]: Start accepts. Automaton has 10295 states and 24904 transitions. Word has length 67 [2021-07-13 20:16:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:22,740 INFO L482 AbstractCegarLoop]: Abstraction has 10295 states and 24904 transitions. [2021-07-13 20:16:22,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10295 states and 24904 transitions. [2021-07-13 20:16:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:16:22,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:22,750 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:22,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:22,950 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -300073807, now seen corresponding path program 129 times [2021-07-13 20:16:22,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:22,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234864628] [2021-07-13 20:16:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:23,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:23,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234864628] [2021-07-13 20:16:23,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234864628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:23,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395995527] [2021-07-13 20:16:23,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:23,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 20:16:23,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:23,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:16:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:24,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395995527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:24,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:24,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-07-13 20:16:24,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042171353] [2021-07-13 20:16:24,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-13 20:16:24,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:24,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-13 20:16:24,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3099, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:16:24,121 INFO L87 Difference]: Start difference. First operand 10295 states and 24904 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:31,507 INFO L93 Difference]: Finished difference Result 35312 states and 77377 transitions. [2021-07-13 20:16:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-07-13 20:16:31,508 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:16:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:31,556 INFO L225 Difference]: With dead ends: 35312 [2021-07-13 20:16:31,556 INFO L226 Difference]: Without dead ends: 34400 [2021-07-13 20:16:31,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30734 ImplicationChecksByTransitivity, 6250.8ms TimeCoverageRelationStatistics Valid=13856, Invalid=63150, Unknown=0, NotChecked=0, Total=77006 [2021-07-13 20:16:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34400 states. [2021-07-13 20:16:31,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34400 to 10319. [2021-07-13 20:16:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 2.418298119790657) internal successors, (24952), 10318 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 24952 transitions. [2021-07-13 20:16:31,827 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 24952 transitions. Word has length 67 [2021-07-13 20:16:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:31,827 INFO L482 AbstractCegarLoop]: Abstraction has 10319 states and 24952 transitions. [2021-07-13 20:16:31,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 24952 transitions. [2021-07-13 20:16:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:16:31,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:31,836 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:32,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-07-13 20:16:32,037 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1490617141, now seen corresponding path program 130 times [2021-07-13 20:16:32,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:32,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742521555] [2021-07-13 20:16:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:32,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:32,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742521555] [2021-07-13 20:16:32,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742521555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:32,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304739373] [2021-07-13 20:16:32,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:32,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:32,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:32,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:16:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:33,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304739373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:33,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:33,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-07-13 20:16:33,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095297062] [2021-07-13 20:16:33,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-07-13 20:16:33,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-07-13 20:16:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:16:33,181 INFO L87 Difference]: Start difference. First operand 10319 states and 24952 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:40,969 INFO L93 Difference]: Finished difference Result 33658 states and 73530 transitions. [2021-07-13 20:16:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-07-13 20:16:40,969 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:16:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:41,018 INFO L225 Difference]: With dead ends: 33658 [2021-07-13 20:16:41,019 INFO L226 Difference]: Without dead ends: 32578 [2021-07-13 20:16:41,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33793 ImplicationChecksByTransitivity, 6665.9ms TimeCoverageRelationStatistics Valid=16733, Invalid=67077, Unknown=0, NotChecked=0, Total=83810 [2021-07-13 20:16:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32578 states. [2021-07-13 20:16:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32578 to 10335. [2021-07-13 20:16:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.4176504741629574) internal successors, (24984), 10334 states have internal predecessors, (24984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 24984 transitions. [2021-07-13 20:16:41,276 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 24984 transitions. Word has length 67 [2021-07-13 20:16:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:41,276 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 24984 transitions. [2021-07-13 20:16:41,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 24984 transitions. [2021-07-13 20:16:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:16:41,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:41,285 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:41,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:41,486 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash 805779129, now seen corresponding path program 131 times [2021-07-13 20:16:41,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:41,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279652298] [2021-07-13 20:16:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:41,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279652298] [2021-07-13 20:16:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279652298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343392883] [2021-07-13 20:16:41,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:41,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 20:16:41,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:41,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:16:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343392883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:42,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:42,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-07-13 20:16:42,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156186565] [2021-07-13 20:16:42,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-07-13 20:16:42,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:42,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-07-13 20:16:42,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=3340, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:16:42,685 INFO L87 Difference]: Start difference. First operand 10335 states and 24984 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:51,899 INFO L93 Difference]: Finished difference Result 29282 states and 65375 transitions. [2021-07-13 20:16:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-07-13 20:16:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:16:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:51,941 INFO L225 Difference]: With dead ends: 29282 [2021-07-13 20:16:51,942 INFO L226 Difference]: Without dead ends: 28076 [2021-07-13 20:16:51,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39537 ImplicationChecksByTransitivity, 8020.7ms TimeCoverageRelationStatistics Valid=20497, Invalid=75913, Unknown=0, NotChecked=0, Total=96410 [2021-07-13 20:16:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28076 states. [2021-07-13 20:16:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28076 to 10468. [2021-07-13 20:16:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3830132798318524) internal successors, (24943), 10467 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 24943 transitions. [2021-07-13 20:16:52,168 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 24943 transitions. Word has length 67 [2021-07-13 20:16:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:52,168 INFO L482 AbstractCegarLoop]: Abstraction has 10468 states and 24943 transitions. [2021-07-13 20:16:52,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 24943 transitions. [2021-07-13 20:16:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:16:52,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:52,177 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:52,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:52,378 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1637879469, now seen corresponding path program 132 times [2021-07-13 20:16:52,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:52,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960992643] [2021-07-13 20:16:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:52,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:52,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960992643] [2021-07-13 20:16:52,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960992643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:52,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533468607] [2021-07-13 20:16:52,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:52,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 20:16:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:52,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-13 20:16:52,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533468607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:53,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:53,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32] total 49 [2021-07-13 20:16:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772470870] [2021-07-13 20:16:53,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 20:16:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 20:16:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:16:53,417 INFO L87 Difference]: Start difference. First operand 10468 states and 24943 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:07,165 INFO L93 Difference]: Finished difference Result 20078 states and 44963 transitions. [2021-07-13 20:17:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-07-13 20:17:07,165 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:17:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:07,191 INFO L225 Difference]: With dead ends: 20078 [2021-07-13 20:17:07,191 INFO L226 Difference]: Without dead ends: 20074 [2021-07-13 20:17:07,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88148 ImplicationChecksByTransitivity, 12391.2ms TimeCoverageRelationStatistics Valid=38110, Invalid=144646, Unknown=0, NotChecked=0, Total=182756 [2021-07-13 20:17:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20074 states. [2021-07-13 20:17:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20074 to 10541. [2021-07-13 20:17:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10541 states, 10540 states have (on average 2.3928842504743835) internal successors, (25221), 10540 states have internal predecessors, (25221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 25221 transitions. [2021-07-13 20:17:07,353 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 25221 transitions. Word has length 67 [2021-07-13 20:17:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:07,353 INFO L482 AbstractCegarLoop]: Abstraction has 10541 states and 25221 transitions. [2021-07-13 20:17:07,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 25221 transitions. [2021-07-13 20:17:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-13 20:17:07,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:07,363 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:07,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-07-13 20:17:07,564 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash 192572857, now seen corresponding path program 133 times [2021-07-13 20:17:07,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:07,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185941080] [2021-07-13 20:17:07,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:07,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:07,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185941080] [2021-07-13 20:17:07,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185941080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:07,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543548513] [2021-07-13 20:17:07,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:17:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:08,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543548513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:08,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:08,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2021-07-13 20:17:08,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215981295] [2021-07-13 20:17:08,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-07-13 20:17:08,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:08,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-07-13 20:17:08,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:17:08,902 INFO L87 Difference]: Start difference. First operand 10541 states and 25221 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:18,517 INFO L93 Difference]: Finished difference Result 14048 states and 32048 transitions. [2021-07-13 20:17:18,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-07-13 20:17:18,517 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:17:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:18,535 INFO L225 Difference]: With dead ends: 14048 [2021-07-13 20:17:18,535 INFO L226 Difference]: Without dead ends: 13436 [2021-07-13 20:17:18,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42486 ImplicationChecksByTransitivity, 8457.0ms TimeCoverageRelationStatistics Valid=27030, Invalid=73142, Unknown=0, NotChecked=0, Total=100172 [2021-07-13 20:17:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2021-07-13 20:17:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 10532. [2021-07-13 20:17:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.3910359889849016) internal successors, (25180), 10531 states have internal predecessors, (25180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25180 transitions. [2021-07-13 20:17:18,677 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25180 transitions. Word has length 69 [2021-07-13 20:17:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:18,677 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25180 transitions. [2021-07-13 20:17:18,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25180 transitions. [2021-07-13 20:17:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-13 20:17:18,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:18,687 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:18,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:18,888 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1907055525, now seen corresponding path program 134 times [2021-07-13 20:17:18,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:18,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409914774] [2021-07-13 20:17:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:19,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:19,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409914774] [2021-07-13 20:17:19,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409914774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:19,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035582992] [2021-07-13 20:17:19,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:19,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:19,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:19,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:17:19,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:19,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035582992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:19,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:19,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32] total 48 [2021-07-13 20:17:19,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688614205] [2021-07-13 20:17:19,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-07-13 20:17:19,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:19,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-07-13 20:17:19,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1881, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:17:19,884 INFO L87 Difference]: Start difference. First operand 10532 states and 25180 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:28,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:28,054 INFO L93 Difference]: Finished difference Result 12908 states and 29868 transitions. [2021-07-13 20:17:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-07-13 20:17:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:17:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:28,069 INFO L225 Difference]: With dead ends: 12908 [2021-07-13 20:17:28,069 INFO L226 Difference]: Without dead ends: 12904 [2021-07-13 20:17:28,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40550 ImplicationChecksByTransitivity, 7653.9ms TimeCoverageRelationStatistics Valid=21246, Invalid=69656, Unknown=0, NotChecked=0, Total=90902 [2021-07-13 20:17:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2021-07-13 20:17:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 10532. [2021-07-13 20:17:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.390941031241098) internal successors, (25179), 10531 states have internal predecessors, (25179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25179 transitions. [2021-07-13 20:17:28,204 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25179 transitions. Word has length 69 [2021-07-13 20:17:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:28,204 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25179 transitions. [2021-07-13 20:17:28,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25179 transitions. [2021-07-13 20:17:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-13 20:17:28,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:28,213 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:28,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:28,413 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:28,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1564076785, now seen corresponding path program 135 times [2021-07-13 20:17:28,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:28,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393183999] [2021-07-13 20:17:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:17:28,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:28,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393183999] [2021-07-13 20:17:28,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393183999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:28,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596426227] [2021-07-13 20:17:28,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:28,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-13 20:17:28,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:28,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-13 20:17:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:29,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596426227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:29,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:29,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-07-13 20:17:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065799104] [2021-07-13 20:17:29,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:29,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:29,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:29,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:29,466 INFO L87 Difference]: Start difference. First operand 10532 states and 25179 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:36,922 INFO L93 Difference]: Finished difference Result 24107 states and 54772 transitions. [2021-07-13 20:17:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-07-13 20:17:36,922 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:17:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:36,959 INFO L225 Difference]: With dead ends: 24107 [2021-07-13 20:17:36,959 INFO L226 Difference]: Without dead ends: 24107 [2021-07-13 20:17:36,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21229 ImplicationChecksByTransitivity, 6823.1ms TimeCoverageRelationStatistics Valid=13586, Invalid=43296, Unknown=0, NotChecked=0, Total=56882 [2021-07-13 20:17:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24107 states. [2021-07-13 20:17:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24107 to 16231. [2021-07-13 20:17:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16231 states, 16230 states have (on average 2.4091189155884165) internal successors, (39100), 16230 states have internal predecessors, (39100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16231 states to 16231 states and 39100 transitions. [2021-07-13 20:17:37,246 INFO L78 Accepts]: Start accepts. Automaton has 16231 states and 39100 transitions. Word has length 69 [2021-07-13 20:17:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:37,246 INFO L482 AbstractCegarLoop]: Abstraction has 16231 states and 39100 transitions. [2021-07-13 20:17:37,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 16231 states and 39100 transitions. [2021-07-13 20:17:37,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:17:37,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:37,263 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:37,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-07-13 20:17:37,463 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash -543763977, now seen corresponding path program 136 times [2021-07-13 20:17:37,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:37,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412698596] [2021-07-13 20:17:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 1 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:37,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412698596] [2021-07-13 20:17:37,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412698596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:37,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30603283] [2021-07-13 20:17:37,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:37,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:17:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:37,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30603283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:37,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:37,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-13 20:17:37,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872820153] [2021-07-13 20:17:37,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:17:37,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:37,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:17:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:17:37,754 INFO L87 Difference]: Start difference. First operand 16231 states and 39100 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:38,048 INFO L93 Difference]: Finished difference Result 19318 states and 46494 transitions. [2021-07-13 20:17:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:17:38,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:17:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:38,075 INFO L225 Difference]: With dead ends: 19318 [2021-07-13 20:17:38,075 INFO L226 Difference]: Without dead ends: 19219 [2021-07-13 20:17:38,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:17:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19219 states. [2021-07-13 20:17:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19219 to 18332. [2021-07-13 20:17:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18332 states, 18331 states have (on average 2.4355463422617425) internal successors, (44646), 18331 states have internal predecessors, (44646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18332 states to 18332 states and 44646 transitions. [2021-07-13 20:17:38,438 INFO L78 Accepts]: Start accepts. Automaton has 18332 states and 44646 transitions. Word has length 71 [2021-07-13 20:17:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:38,438 INFO L482 AbstractCegarLoop]: Abstraction has 18332 states and 44646 transitions. [2021-07-13 20:17:38,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 18332 states and 44646 transitions. [2021-07-13 20:17:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:17:38,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:38,455 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:38,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-07-13 20:17:38,656 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:38,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:38,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1240447561, now seen corresponding path program 137 times [2021-07-13 20:17:38,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:38,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602591006] [2021-07-13 20:17:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:39,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:39,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602591006] [2021-07-13 20:17:39,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602591006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:39,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381692666] [2021-07-13 20:17:39,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:39,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 20:17:39,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:39,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 85 conjunts are in the unsatisfiable core [2021-07-13 20:17:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:40,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381692666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:40,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:40,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-07-13 20:17:40,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941316120] [2021-07-13 20:17:40,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-13 20:17:40,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:40,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-13 20:17:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=4037, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:17:40,605 INFO L87 Difference]: Start difference. First operand 18332 states and 44646 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:48,552 INFO L93 Difference]: Finished difference Result 22788 states and 54409 transitions. [2021-07-13 20:17:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-13 20:17:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:17:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:48,584 INFO L225 Difference]: With dead ends: 22788 [2021-07-13 20:17:48,585 INFO L226 Difference]: Without dead ends: 22782 [2021-07-13 20:17:48,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8535 ImplicationChecksByTransitivity, 5386.2ms TimeCoverageRelationStatistics Valid=1710, Invalid=29796, Unknown=0, NotChecked=0, Total=31506 [2021-07-13 20:17:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22782 states. [2021-07-13 20:17:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22782 to 18201. [2021-07-13 20:17:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18201 states, 18200 states have (on average 2.431263736263736) internal successors, (44249), 18200 states have internal predecessors, (44249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18201 states to 18201 states and 44249 transitions. [2021-07-13 20:17:48,891 INFO L78 Accepts]: Start accepts. Automaton has 18201 states and 44249 transitions. Word has length 71 [2021-07-13 20:17:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:48,891 INFO L482 AbstractCegarLoop]: Abstraction has 18201 states and 44249 transitions. [2021-07-13 20:17:48,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 18201 states and 44249 transitions. [2021-07-13 20:17:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:17:48,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:48,908 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:49,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-13 20:17:49,108 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash -761922611, now seen corresponding path program 138 times [2021-07-13 20:17:49,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:49,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525982621] [2021-07-13 20:17:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:49,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:49,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525982621] [2021-07-13 20:17:49,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525982621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:49,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256616704] [2021-07-13 20:17:49,386 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:49,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-13 20:17:49,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:49,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-07-13 20:17:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:50,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256616704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:50,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:50,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 54 [2021-07-13 20:17:50,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182763255] [2021-07-13 20:17:50,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-07-13 20:17:50,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:50,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-07-13 20:17:50,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:17:50,423 INFO L87 Difference]: Start difference. First operand 18201 states and 44249 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:01,236 INFO L93 Difference]: Finished difference Result 32295 states and 74537 transitions. [2021-07-13 20:18:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-07-13 20:18:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:18:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:01,289 INFO L225 Difference]: With dead ends: 32295 [2021-07-13 20:18:01,289 INFO L226 Difference]: Without dead ends: 32271 [2021-07-13 20:18:01,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17146 ImplicationChecksByTransitivity, 5859.8ms TimeCoverageRelationStatistics Valid=3190, Invalid=46762, Unknown=0, NotChecked=0, Total=49952 [2021-07-13 20:18:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32271 states. [2021-07-13 20:18:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32271 to 18835. [2021-07-13 20:18:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18835 states, 18834 states have (on average 2.43320590421578) internal successors, (45827), 18834 states have internal predecessors, (45827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18835 states to 18835 states and 45827 transitions. [2021-07-13 20:18:01,658 INFO L78 Accepts]: Start accepts. Automaton has 18835 states and 45827 transitions. Word has length 71 [2021-07-13 20:18:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:01,658 INFO L482 AbstractCegarLoop]: Abstraction has 18835 states and 45827 transitions. [2021-07-13 20:18:01,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 18835 states and 45827 transitions. [2021-07-13 20:18:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:18:01,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:01,677 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:01,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:01,878 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:01,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:01,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1492288521, now seen corresponding path program 139 times [2021-07-13 20:18:01,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:01,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022022140] [2021-07-13 20:18:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:02,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:02,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022022140] [2021-07-13 20:18:02,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022022140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:02,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180684152] [2021-07-13 20:18:02,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:02,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-07-13 20:18:02,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:03,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180684152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:03,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:03,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34] total 53 [2021-07-13 20:18:03,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286141812] [2021-07-13 20:18:03,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 20:18:03,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 20:18:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2613, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:18:03,182 INFO L87 Difference]: Start difference. First operand 18835 states and 45827 transitions. Second operand has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:11,685 INFO L93 Difference]: Finished difference Result 22962 states and 54390 transitions. [2021-07-13 20:18:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-13 20:18:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:18:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:11,718 INFO L225 Difference]: With dead ends: 22962 [2021-07-13 20:18:11,719 INFO L226 Difference]: Without dead ends: 22958 [2021-07-13 20:18:11,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10162 ImplicationChecksByTransitivity, 4784.6ms TimeCoverageRelationStatistics Valid=2219, Invalid=30361, Unknown=0, NotChecked=0, Total=32580 [2021-07-13 20:18:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22958 states. [2021-07-13 20:18:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22958 to 18355. [2021-07-13 20:18:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18355 states, 18354 states have (on average 2.4328756674294434) internal successors, (44653), 18354 states have internal predecessors, (44653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18355 states to 18355 states and 44653 transitions. [2021-07-13 20:18:12,003 INFO L78 Accepts]: Start accepts. Automaton has 18355 states and 44653 transitions. Word has length 71 [2021-07-13 20:18:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:12,004 INFO L482 AbstractCegarLoop]: Abstraction has 18355 states and 44653 transitions. [2021-07-13 20:18:12,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 18355 states and 44653 transitions. [2021-07-13 20:18:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:18:12,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:12,022 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:12,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-07-13 20:18:12,223 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash -350033327, now seen corresponding path program 140 times [2021-07-13 20:18:12,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:12,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497631594] [2021-07-13 20:18:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:12,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:12,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497631594] [2021-07-13 20:18:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497631594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:12,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281089691] [2021-07-13 20:18:12,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:12,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:12,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-13 20:18:12,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:13,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281089691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:13,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:13,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33] total 55 [2021-07-13 20:18:13,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472204364] [2021-07-13 20:18:13,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-07-13 20:18:13,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:13,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-07-13 20:18:13,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2813, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:18:13,581 INFO L87 Difference]: Start difference. First operand 18355 states and 44653 transitions. Second operand has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:27,130 INFO L93 Difference]: Finished difference Result 37702 states and 86336 transitions. [2021-07-13 20:18:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-07-13 20:18:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:18:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:27,185 INFO L225 Difference]: With dead ends: 37702 [2021-07-13 20:18:27,185 INFO L226 Difference]: Without dead ends: 37654 [2021-07-13 20:18:27,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30992 ImplicationChecksByTransitivity, 7540.7ms TimeCoverageRelationStatistics Valid=5971, Invalid=77261, Unknown=0, NotChecked=0, Total=83232 [2021-07-13 20:18:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37654 states. [2021-07-13 20:18:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37654 to 18337. [2021-07-13 20:18:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18337 states, 18336 states have (on average 2.4334096858638743) internal successors, (44619), 18336 states have internal predecessors, (44619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 44619 transitions. [2021-07-13 20:18:27,528 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 44619 transitions. Word has length 71 [2021-07-13 20:18:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:27,528 INFO L482 AbstractCegarLoop]: Abstraction has 18337 states and 44619 transitions. [2021-07-13 20:18:27,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 44619 transitions. [2021-07-13 20:18:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:18:27,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:27,546 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:27,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:27,747 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:27,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2012235221, now seen corresponding path program 141 times [2021-07-13 20:18:27,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:27,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836268134] [2021-07-13 20:18:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:28,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:28,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836268134] [2021-07-13 20:18:28,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836268134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:28,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625064755] [2021-07-13 20:18:28,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:28,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-13 20:18:28,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:28,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2021-07-13 20:18:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:29,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625064755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:29,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:29,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-07-13 20:18:29,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442255616] [2021-07-13 20:18:29,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-13 20:18:29,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:29,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-13 20:18:29,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2905, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:18:29,111 INFO L87 Difference]: Start difference. First operand 18337 states and 44619 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 20:18:41,090 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-07-13 20:18:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2021-07-13 20:18:41,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-07-13 20:18:41,291 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:18:41,293 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:18:41,294 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:18:41,294 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:18:41 BasicIcfg [2021-07-13 20:18:41,294 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:18:41,295 INFO L168 Benchmark]: Toolchain (without parser) took 764807.35 ms. Allocated memory was 204.5 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 183.9 MB in the beginning and 419.6 MB in the end (delta: -235.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-07-13 20:18:41,295 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 185.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:18:41,295 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.21 ms. Allocated memory is still 204.5 MB. Free memory was 183.8 MB in the beginning and 182.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:41,295 INFO L168 Benchmark]: Boogie Preprocessor took 12.92 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 181.4 MB in the end (delta: 999.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:41,295 INFO L168 Benchmark]: RCFGBuilder took 194.09 ms. Allocated memory is still 204.5 MB. Free memory was 181.4 MB in the beginning and 170.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:18:41,295 INFO L168 Benchmark]: TraceAbstraction took 764574.61 ms. Allocated memory was 204.5 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 169.7 MB in the beginning and 419.6 MB in the end (delta: -249.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-07-13 20:18:41,295 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 185.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.21 ms. Allocated memory is still 204.5 MB. Free memory was 183.8 MB in the beginning and 182.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.92 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 181.4 MB in the end (delta: 999.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 194.09 ms. Allocated memory is still 204.5 MB. Free memory was 181.4 MB in the beginning and 170.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 764574.61 ms. Allocated memory was 204.5 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 169.7 MB in the beginning and 419.6 MB in the end (delta: -249.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (18337states) and FLOYD_HOARE automaton (currently 243 states, 57 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 17ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 764495.4ms, OverallIterations: 143, TraceHistogramMax: 14, EmptinessCheckTime: 673.7ms, AutomataDifference: 619855.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9171 SDtfs, 72774 SDslu, 162896 SDs, 0 SdLazy, 472142 SolverSat, 22786 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 151281.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26617 GetRequests, 4857 SyntacticMatches, 93 SemanticMatches, 21666 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812525 ImplicationChecksByTransitivity, 479044.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18835occurred in iteration=140, InterpolantAutomatonStates: 17058, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13397.6ms AutomataMinimizationTime, 142 MinimizatonAttempts, 881684 StatesRemovedByMinimization, 142 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 522.9ms SsaConstructionTime, 2826.3ms SatisfiabilityAnalysisTime, 95119.7ms InterpolantComputationTime, 14110 NumberOfCodeBlocks, 14110 NumberOfCodeBlocksAsserted, 1044 NumberOfCheckSat, 13826 ConstructedInterpolants, 0 QuantifiedInterpolants, 128219 SizeOfPredicates, 528 NumberOfNonLiveVariables, 16399 ConjunctsInSsa, 6166 ConjunctsInUnsatCore, 284 InterpolantComputations, 2 PerfectInterpolantSequences, 8486/50045 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown