/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-01 20:49:24,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-01 20:49:24,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-01 20:49:24,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-01 20:49:24,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-01 20:49:24,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-01 20:49:24,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-01 20:49:24,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-01 20:49:24,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-01 20:49:24,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-01 20:49:24,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-01 20:49:24,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-01 20:49:24,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-01 20:49:24,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-01 20:49:24,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-01 20:49:24,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-01 20:49:24,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-01 20:49:24,988 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-01 20:49:25,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-01 20:49:25,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-01 20:49:25,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-01 20:49:25,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-01 20:49:25,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-01 20:49:25,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-01 20:49:25,018 INFO L138 SettingsManager]: * Use SBE=true [2021-06-01 20:49:25,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-01 20:49:25,018 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-01 20:49:25,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-01 20:49:25,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-01 20:49:25,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-01 20:49:25,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-01 20:49:25,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-01 20:49:25,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-01 20:49:25,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-01 20:49:25,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-01 20:49:25,019 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-01 20:49:25,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-01 20:49:25,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-01 20:49:25,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-01 20:49:25,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-01 20:49:25,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-01 20:49:25,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 20:49:25,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-01 20:49:25,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-01 20:49:25,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-01 20:49:25,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-01 20:49:25,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-01 20:49:25,021 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-01 20:49:25,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-01 20:49:25,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-01 20:49:25,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-01 20:49:25,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-01 20:49:25,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-01 20:49:25,307 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-01 20:49:25,308 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-01 20:49:25,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-06-01 20:49:25,309 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-06-01 20:49:25,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-01 20:49:25,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-01 20:49:25,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-01 20:49:25,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-01 20:49:25,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-01 20:49:25,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-01 20:49:25,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-01 20:49:25,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-01 20:49:25,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-01 20:49:25,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... [2021-06-01 20:49:25,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-01 20:49:25,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-01 20:49:25,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-01 20:49:25,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-01 20:49:25,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 20:49:25,447 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-01 20:49:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-01 20:49:25,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-01 20:49:25,448 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-01 20:49:25,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-01 20:49:25,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-01 20:49:25,448 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-01 20:49:25,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-01 20:49:25,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-01 20:49:25,449 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-01 20:49:25,639 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-01 20:49:25,639 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-01 20:49:25,640 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 08:49:25 BoogieIcfgContainer [2021-06-01 20:49:25,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-01 20:49:25,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-01 20:49:25,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-01 20:49:25,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-01 20:49:25,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 08:49:25" (1/2) ... [2021-06-01 20:49:25,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248f9735 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.06 08:49:25, skipping insertion in model container [2021-06-01 20:49:25,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 08:49:25" (2/2) ... [2021-06-01 20:49:25,646 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-06-01 20:49:25,649 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-01 20:49:25,650 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-01 20:49:25,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-01 20:49:25,650 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-01 20:49:25,685 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-01 20:49:25,713 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-01 20:49:25,726 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-01 20:49:25,726 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-01 20:49:25,726 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-01 20:49:25,726 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-01 20:49:25,726 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-01 20:49:25,727 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-01 20:49:25,727 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-01 20:49:25,727 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-01 20:49:25,732 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-01 20:49:25,739 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:25,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-01 20:49:25,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:25,756 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:25,756 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1715863245, now seen corresponding path program 1 times [2021-06-01 20:49:25,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:25,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834705552] [2021-06-01 20:49:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:25,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:25,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834705552] [2021-06-01 20:49:25,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834705552] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 20:49:25,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 20:49:25,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-01 20:49:25,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602734607] [2021-06-01 20:49:25,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 20:49:25,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:25,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 20:49:25,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 20:49:25,901 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-06-01 20:49:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:25,951 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-01 20:49:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 20:49:25,954 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 [2021-06-01 20:49:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:25,962 INFO L225 Difference]: With dead ends: 43 [2021-06-01 20:49:25,962 INFO L226 Difference]: Without dead ends: 43 [2021-06-01 20:49:25,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-01 20:49:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-01 20:49:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-01 20:49:25,990 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) [2021-06-01 20:49:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-01 20:49:25,992 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-01 20:49:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:25,993 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-01 20:49:25,994 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) [2021-06-01 20:49:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-01 20:49:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-01 20:49:25,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:25,995 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:25,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-01 20:49:25,996 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:25,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:25,999 INFO L82 PathProgramCache]: Analyzing trace with hash -599854287, now seen corresponding path program 1 times [2021-06-01 20:49:25,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:26,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914778973] [2021-06-01 20:49:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:49:26,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:26,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914778973] [2021-06-01 20:49:26,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914778973] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 20:49:26,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 20:49:26,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-01 20:49:26,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084108391] [2021-06-01 20:49:26,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 20:49:26,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:26,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 20:49:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-01 20:49:26,063 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) [2021-06-01 20:49:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:26,095 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-01 20:49:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 20:49:26,095 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 [2021-06-01 20:49:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:26,098 INFO L225 Difference]: With dead ends: 50 [2021-06-01 20:49:26,098 INFO L226 Difference]: Without dead ends: 50 [2021-06-01 20:49:26,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-01 20:49:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-01 20:49:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-01 20:49:26,108 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) [2021-06-01 20:49:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-01 20:49:26,110 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-01 20:49:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:26,110 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-01 20:49:26,110 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) [2021-06-01 20:49:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-01 20:49:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-01 20:49:26,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:26,112 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:26,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-01 20:49:26,112 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1329802641, now seen corresponding path program 1 times [2021-06-01 20:49:26,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:26,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210493910] [2021-06-01 20:49:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:26,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210493910] [2021-06-01 20:49:26,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210493910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:26,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132199209] [2021-06-01 20:49:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:26,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 20:49:26,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:26,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132199209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:26,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:26,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-01 20:49:26,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992191869] [2021-06-01 20:49:26,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-01 20:49:26,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:26,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-01 20:49:26,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-01 20:49:26,504 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:26,620 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-06-01 20:49:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 20:49:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-01 20:49:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:26,621 INFO L225 Difference]: With dead ends: 144 [2021-06-01 20:49:26,621 INFO L226 Difference]: Without dead ends: 113 [2021-06-01 20:49:26,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-01 20:49:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-01 20:49:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2021-06-01 20:49:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-06-01 20:49:26,628 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-06-01 20:49:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:26,628 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-06-01 20:49:26,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-06-01 20:49:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 20:49:26,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:26,629 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:26,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-01 20:49:26,845 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1564465709, now seen corresponding path program 2 times [2021-06-01 20:49:26,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:26,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522729272] [2021-06-01 20:49:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:26,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522729272] [2021-06-01 20:49:26,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522729272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049512777] [2021-06-01 20:49:26,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:26,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:49:26,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 20:49:26,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:27,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049512777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:27,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:27,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-01 20:49:27,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118659473] [2021-06-01 20:49:27,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 20:49:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:27,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 20:49:27,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-01 20:49:27,063 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:27,311 INFO L93 Difference]: Finished difference Result 167 states and 307 transitions. [2021-06-01 20:49:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-01 20:49:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 20:49:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:27,317 INFO L225 Difference]: With dead ends: 167 [2021-06-01 20:49:27,317 INFO L226 Difference]: Without dead ends: 167 [2021-06-01 20:49:27,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-01 20:49:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-01 20:49:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2021-06-01 20:49:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-01 20:49:27,332 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2021-06-01 20:49:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:27,332 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-01 20:49:27,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-01 20:49:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-01 20:49:27,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:27,333 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:27,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:27,541 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:27,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1814278047, now seen corresponding path program 3 times [2021-06-01 20:49:27,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:27,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400156641] [2021-06-01 20:49:27,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:27,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:27,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400156641] [2021-06-01 20:49:27,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400156641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:27,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364119245] [2021-06-01 20:49:27,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:27,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 20:49:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 20:49:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:27,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364119245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:27,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:27,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-01 20:49:27,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787343117] [2021-06-01 20:49:27,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 20:49:27,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:27,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 20:49:27,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-01 20:49:27,737 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:27,975 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2021-06-01 20:49:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-01 20:49:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-01 20:49:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:27,976 INFO L225 Difference]: With dead ends: 141 [2021-06-01 20:49:27,976 INFO L226 Difference]: Without dead ends: 139 [2021-06-01 20:49:27,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:49:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-01 20:49:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2021-06-01 20:49:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-06-01 20:49:27,980 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2021-06-01 20:49:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:27,980 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-06-01 20:49:27,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-06-01 20:49:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 20:49:27,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:27,981 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:28,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-01 20:49:28,202 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:28,202 INFO L82 PathProgramCache]: Analyzing trace with hash -709724757, now seen corresponding path program 4 times [2021-06-01 20:49:28,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:28,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010706391] [2021-06-01 20:49:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:28,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:28,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010706391] [2021-06-01 20:49:28,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010706391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:28,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919957915] [2021-06-01 20:49:28,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:28,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:49:28,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 20:49:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:28,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919957915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:28,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:28,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-01 20:49:28,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653658358] [2021-06-01 20:49:28,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-01 20:49:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-01 20:49:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-01 20:49:28,758 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:29,331 INFO L93 Difference]: Finished difference Result 350 states and 689 transitions. [2021-06-01 20:49:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 20:49:29,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-01 20:49:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:29,333 INFO L225 Difference]: With dead ends: 350 [2021-06-01 20:49:29,333 INFO L226 Difference]: Without dead ends: 293 [2021-06-01 20:49:29,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:49:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-01 20:49:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 93. [2021-06-01 20:49:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 185 transitions. [2021-06-01 20:49:29,339 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 185 transitions. Word has length 23 [2021-06-01 20:49:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:29,339 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 185 transitions. [2021-06-01 20:49:29,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 185 transitions. [2021-06-01 20:49:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 20:49:29,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:29,340 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:29,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:29,557 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -923989763, now seen corresponding path program 5 times [2021-06-01 20:49:29,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:29,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763671053] [2021-06-01 20:49:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:29,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:29,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763671053] [2021-06-01 20:49:29,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763671053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:29,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374077050] [2021-06-01 20:49:29,689 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) [2021-06-01 20:49:29,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 20:49:29,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 20:49:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:29,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374077050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:29,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:29,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-01 20:49:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427155141] [2021-06-01 20:49:29,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-01 20:49:29,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-01 20:49:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-01 20:49:29,994 INFO L87 Difference]: Start difference. First operand 93 states and 185 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:30,598 INFO L93 Difference]: Finished difference Result 326 states and 652 transitions. [2021-06-01 20:49:30,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-01 20:49:30,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-01 20:49:30,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:30,600 INFO L225 Difference]: With dead ends: 326 [2021-06-01 20:49:30,600 INFO L226 Difference]: Without dead ends: 286 [2021-06-01 20:49:30,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 597.4ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:49:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-01 20:49:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 120. [2021-06-01 20:49:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 119 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 246 transitions. [2021-06-01 20:49:30,605 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 246 transitions. Word has length 23 [2021-06-01 20:49:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:30,605 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 246 transitions. [2021-06-01 20:49:30,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 246 transitions. [2021-06-01 20:49:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 20:49:30,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:30,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:30,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-01 20:49:30,821 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash 656818999, now seen corresponding path program 6 times [2021-06-01 20:49:30,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:30,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915523454] [2021-06-01 20:49:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:30,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:30,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915523454] [2021-06-01 20:49:30,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915523454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:30,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088857694] [2021-06-01 20:49:30,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:30,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 20:49:30,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:30,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 20:49:30,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:31,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088857694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:31,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:31,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-01 20:49:31,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325511517] [2021-06-01 20:49:31,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-01 20:49:31,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:31,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-01 20:49:31,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-01 20:49:31,274 INFO L87 Difference]: Start difference. First operand 120 states and 246 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:32,346 INFO L93 Difference]: Finished difference Result 387 states and 768 transitions. [2021-06-01 20:49:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-01 20:49:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-01 20:49:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:32,348 INFO L225 Difference]: With dead ends: 387 [2021-06-01 20:49:32,348 INFO L226 Difference]: Without dead ends: 341 [2021-06-01 20:49:32,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1039.7ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-06-01 20:49:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-01 20:49:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 124. [2021-06-01 20:49:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 255 transitions. [2021-06-01 20:49:32,353 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 255 transitions. Word has length 23 [2021-06-01 20:49:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:32,354 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 255 transitions. [2021-06-01 20:49:32,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 255 transitions. [2021-06-01 20:49:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-01 20:49:32,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:32,355 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:32,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:32,557 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:32,558 INFO L82 PathProgramCache]: Analyzing trace with hash -73546911, now seen corresponding path program 7 times [2021-06-01 20:49:32,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:32,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842007349] [2021-06-01 20:49:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:32,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:32,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842007349] [2021-06-01 20:49:32,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842007349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:32,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088072660] [2021-06-01 20:49:32,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:32,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-01 20:49:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:49:32,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088072660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:32,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:32,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-01 20:49:32,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058808798] [2021-06-01 20:49:32,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-01 20:49:32,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-01 20:49:32,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-01 20:49:32,809 INFO L87 Difference]: Start difference. First operand 124 states and 255 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:33,294 INFO L93 Difference]: Finished difference Result 302 states and 585 transitions. [2021-06-01 20:49:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 20:49:33,294 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-01 20:49:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:33,295 INFO L225 Difference]: With dead ends: 302 [2021-06-01 20:49:33,295 INFO L226 Difference]: Without dead ends: 294 [2021-06-01 20:49:33,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:49:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-01 20:49:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 161. [2021-06-01 20:49:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-06-01 20:49:33,300 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 23 [2021-06-01 20:49:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:33,301 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-06-01 20:49:33,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-06-01 20:49:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 20:49:33,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:33,302 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:33,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-01 20:49:33,517 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash -170955159, now seen corresponding path program 8 times [2021-06-01 20:49:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:33,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859969350] [2021-06-01 20:49:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:33,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:33,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859969350] [2021-06-01 20:49:33,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859969350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:33,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369326179] [2021-06-01 20:49:33,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:33,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:49:33,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-01 20:49:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:33,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369326179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:33,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:33,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-01 20:49:33,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173929742] [2021-06-01 20:49:33,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-01 20:49:33,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:33,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-01 20:49:33,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-01 20:49:33,761 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:34,173 INFO L93 Difference]: Finished difference Result 404 states and 806 transitions. [2021-06-01 20:49:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-01 20:49:34,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-01 20:49:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:34,174 INFO L225 Difference]: With dead ends: 404 [2021-06-01 20:49:34,174 INFO L226 Difference]: Without dead ends: 404 [2021-06-01 20:49:34,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-01 20:49:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-01 20:49:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 175. [2021-06-01 20:49:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2011494252873565) internal successors, (383), 174 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 383 transitions. [2021-06-01 20:49:34,179 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 383 transitions. Word has length 25 [2021-06-01 20:49:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:34,179 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 383 transitions. [2021-06-01 20:49:34,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 383 transitions. [2021-06-01 20:49:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-01 20:49:34,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:34,180 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:34,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-01 20:49:34,393 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash 465222687, now seen corresponding path program 9 times [2021-06-01 20:49:34,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:34,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976514881] [2021-06-01 20:49:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:34,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:34,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976514881] [2021-06-01 20:49:34,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976514881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:34,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103358994] [2021-06-01 20:49:34,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:34,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:49:34,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:34,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 20:49:34,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:34,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103358994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:34,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:34,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-01 20:49:34,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878097050] [2021-06-01 20:49:34,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-01 20:49:34,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:34,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-01 20:49:34,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-01 20:49:34,589 INFO L87 Difference]: Start difference. First operand 175 states and 383 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) [2021-06-01 20:49:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:35,172 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-06-01 20:49:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-01 20:49:35,173 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 [2021-06-01 20:49:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:35,174 INFO L225 Difference]: With dead ends: 308 [2021-06-01 20:49:35,174 INFO L226 Difference]: Without dead ends: 306 [2021-06-01 20:49:35,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2021-06-01 20:49:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-01 20:49:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 175. [2021-06-01 20:49:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-06-01 20:49:35,179 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 25 [2021-06-01 20:49:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:35,179 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-06-01 20:49:35,179 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) [2021-06-01 20:49:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-06-01 20:49:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:35,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:35,180 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:35,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:35,385 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2001868057, now seen corresponding path program 10 times [2021-06-01 20:49:35,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:35,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884983970] [2021-06-01 20:49:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:35,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:35,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884983970] [2021-06-01 20:49:35,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884983970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:35,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851575218] [2021-06-01 20:49:35,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:35,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:49:35,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:49:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:35,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851575218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:35,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:35,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-01 20:49:35,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172369907] [2021-06-01 20:49:35,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:49:35,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:35,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:49:35,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:49:35,946 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:36,779 INFO L93 Difference]: Finished difference Result 609 states and 1253 transitions. [2021-06-01 20:49:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-01 20:49:36,780 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 [2021-06-01 20:49:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:36,781 INFO L225 Difference]: With dead ends: 609 [2021-06-01 20:49:36,782 INFO L226 Difference]: Without dead ends: 543 [2021-06-01 20:49:36,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 849.2ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-06-01 20:49:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-01 20:49:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 229. [2021-06-01 20:49:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.219298245614035) internal successors, (506), 228 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 506 transitions. [2021-06-01 20:49:36,789 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 506 transitions. Word has length 27 [2021-06-01 20:49:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:36,789 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 506 transitions. [2021-06-01 20:49:36,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 506 transitions. [2021-06-01 20:49:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:36,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:36,790 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:36,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-01 20:49:36,991 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1752108615, now seen corresponding path program 11 times [2021-06-01 20:49:36,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:36,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120310261] [2021-06-01 20:49:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:37,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:37,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120310261] [2021-06-01 20:49:37,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120310261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:37,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348291780] [2021-06-01 20:49:37,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:37,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 20:49:37,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:49:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:37,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348291780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:37,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:37,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-01 20:49:37,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36930692] [2021-06-01 20:49:37,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:49:37,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:37,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:49:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:49:37,568 INFO L87 Difference]: Start difference. First operand 229 states and 506 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:38,447 INFO L93 Difference]: Finished difference Result 588 states and 1219 transitions. [2021-06-01 20:49:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-01 20:49:38,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 [2021-06-01 20:49:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:38,449 INFO L225 Difference]: With dead ends: 588 [2021-06-01 20:49:38,449 INFO L226 Difference]: Without dead ends: 534 [2021-06-01 20:49:38,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 900.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-01 20:49:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-01 20:49:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 248. [2021-06-01 20:49:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.210526315789474) internal successors, (546), 247 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 546 transitions. [2021-06-01 20:49:38,456 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 546 transitions. Word has length 27 [2021-06-01 20:49:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:38,456 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 546 transitions. [2021-06-01 20:49:38,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 546 transitions. [2021-06-01 20:49:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:38,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:38,457 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:38,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-01 20:49:38,665 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1644513465, now seen corresponding path program 12 times [2021-06-01 20:49:38,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:38,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441715939] [2021-06-01 20:49:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:38,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:38,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441715939] [2021-06-01 20:49:38,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441715939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:38,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199019033] [2021-06-01 20:49:38,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:38,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 20:49:38,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:38,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:49:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:39,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199019033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:39,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:39,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-01 20:49:39,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795971631] [2021-06-01 20:49:39,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:49:39,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:39,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:49:39,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:49:39,214 INFO L87 Difference]: Start difference. First operand 248 states and 546 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:40,190 INFO L93 Difference]: Finished difference Result 592 states and 1236 transitions. [2021-06-01 20:49:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-01 20:49:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 [2021-06-01 20:49:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:40,192 INFO L225 Difference]: With dead ends: 592 [2021-06-01 20:49:40,192 INFO L226 Difference]: Without dead ends: 559 [2021-06-01 20:49:40,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 956.2ms TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-06-01 20:49:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-01 20:49:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 272. [2021-06-01 20:49:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.206642066420664) internal successors, (598), 271 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 598 transitions. [2021-06-01 20:49:40,198 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 598 transitions. Word has length 27 [2021-06-01 20:49:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:40,199 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 598 transitions. [2021-06-01 20:49:40,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 598 transitions. [2021-06-01 20:49:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:40,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:40,199 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:40,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:40,413 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1281656179, now seen corresponding path program 13 times [2021-06-01 20:49:40,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:40,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651682533] [2021-06-01 20:49:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:40,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:40,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651682533] [2021-06-01 20:49:40,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651682533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:40,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258510197] [2021-06-01 20:49:40,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:40,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:49:40,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:41,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258510197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:41,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:41,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-01 20:49:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855340359] [2021-06-01 20:49:41,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:49:41,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:41,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:49:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:49:41,028 INFO L87 Difference]: Start difference. First operand 272 states and 598 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:42,348 INFO L93 Difference]: Finished difference Result 679 states and 1420 transitions. [2021-06-01 20:49:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-01 20:49:42,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 [2021-06-01 20:49:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:42,350 INFO L225 Difference]: With dead ends: 679 [2021-06-01 20:49:42,350 INFO L226 Difference]: Without dead ends: 616 [2021-06-01 20:49:42,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1292.1ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-06-01 20:49:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-01 20:49:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 280. [2021-06-01 20:49:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.2007168458781363) internal successors, (614), 279 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 614 transitions. [2021-06-01 20:49:42,357 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 614 transitions. Word has length 27 [2021-06-01 20:49:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:42,357 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 614 transitions. [2021-06-01 20:49:42,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 614 transitions. [2021-06-01 20:49:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:42,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:42,358 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:42,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-01 20:49:42,565 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 383310963, now seen corresponding path program 14 times [2021-06-01 20:49:42,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:42,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220821038] [2021-06-01 20:49:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:42,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:42,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220821038] [2021-06-01 20:49:42,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220821038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:42,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879557043] [2021-06-01 20:49:42,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:42,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:49:42,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:49:42,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:43,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879557043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:43,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:43,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-01 20:49:43,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585233115] [2021-06-01 20:49:43,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:49:43,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:43,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:49:43,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:49:43,123 INFO L87 Difference]: Start difference. First operand 280 states and 614 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:44,870 INFO L93 Difference]: Finished difference Result 744 states and 1546 transitions. [2021-06-01 20:49:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-01 20:49:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 [2021-06-01 20:49:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:44,872 INFO L225 Difference]: With dead ends: 744 [2021-06-01 20:49:44,872 INFO L226 Difference]: Without dead ends: 704 [2021-06-01 20:49:44,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1622.3ms TimeCoverageRelationStatistics Valid=710, Invalid=3322, Unknown=0, NotChecked=0, Total=4032 [2021-06-01 20:49:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-01 20:49:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 291. [2021-06-01 20:49:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2103448275862068) internal successors, (641), 290 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 641 transitions. [2021-06-01 20:49:44,880 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 641 transitions. Word has length 27 [2021-06-01 20:49:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:44,880 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 641 transitions. [2021-06-01 20:49:44,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2021-06-01 20:49:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:44,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:44,880 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:45,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:45,096 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:45,097 INFO L82 PathProgramCache]: Analyzing trace with hash 113919671, now seen corresponding path program 15 times [2021-06-01 20:49:45,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:45,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178641209] [2021-06-01 20:49:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:45,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178641209] [2021-06-01 20:49:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178641209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432595697] [2021-06-01 20:49:45,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:45,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-01 20:49:45,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-01 20:49:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:45,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432595697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:45,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:45,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-01 20:49:45,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515963848] [2021-06-01 20:49:45,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-01 20:49:45,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:45,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-01 20:49:45,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-01 20:49:45,448 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:46,227 INFO L93 Difference]: Finished difference Result 662 states and 1432 transitions. [2021-06-01 20:49:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-01 20:49:46,227 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 [2021-06-01 20:49:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:46,229 INFO L225 Difference]: With dead ends: 662 [2021-06-01 20:49:46,229 INFO L226 Difference]: Without dead ends: 662 [2021-06-01 20:49:46,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 761.8ms TimeCoverageRelationStatistics Valid=438, Invalid=1632, Unknown=0, NotChecked=0, Total=2070 [2021-06-01 20:49:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-01 20:49:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 340. [2021-06-01 20:49:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.2359882005899707) internal successors, (758), 339 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 758 transitions. [2021-06-01 20:49:46,236 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 758 transitions. Word has length 27 [2021-06-01 20:49:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:46,236 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 758 transitions. [2021-06-01 20:49:46,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 758 transitions. [2021-06-01 20:49:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:46,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:46,237 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:46,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:46,441 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:46,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:46,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1553365309, now seen corresponding path program 16 times [2021-06-01 20:49:46,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:46,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000407820] [2021-06-01 20:49:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:46,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:46,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000407820] [2021-06-01 20:49:46,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000407820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:46,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134121087] [2021-06-01 20:49:46,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:46,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:49:46,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:46,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:49:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:47,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134121087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:47,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:47,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-01 20:49:47,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449620397] [2021-06-01 20:49:47,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:49:47,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:47,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:49:47,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:49:47,026 INFO L87 Difference]: Start difference. First operand 340 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:49,032 INFO L93 Difference]: Finished difference Result 1105 states and 2323 transitions. [2021-06-01 20:49:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-01 20:49:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 [2021-06-01 20:49:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:49,035 INFO L225 Difference]: With dead ends: 1105 [2021-06-01 20:49:49,035 INFO L226 Difference]: Without dead ends: 1038 [2021-06-01 20:49:49,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1825.5ms TimeCoverageRelationStatistics Valid=688, Invalid=4424, Unknown=0, NotChecked=0, Total=5112 [2021-06-01 20:49:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-01 20:49:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 406. [2021-06-01 20:49:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.3061728395061727) internal successors, (934), 405 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 934 transitions. [2021-06-01 20:49:49,045 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 934 transitions. Word has length 27 [2021-06-01 20:49:49,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:49,045 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 934 transitions. [2021-06-01 20:49:49,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 934 transitions. [2021-06-01 20:49:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:49,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:49,046 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:49,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:49,253 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:49,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash -525801667, now seen corresponding path program 17 times [2021-06-01 20:49:49,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:49,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748613653] [2021-06-01 20:49:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:49,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:49,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748613653] [2021-06-01 20:49:49,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748613653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:49,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559289282] [2021-06-01 20:49:49,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:49,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 20:49:49,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:49,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-01 20:49:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:49,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559289282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:49,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:49,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-01 20:49:49,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990542304] [2021-06-01 20:49:49,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-01 20:49:49,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:49,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-01 20:49:49,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-01 20:49:49,629 INFO L87 Difference]: Start difference. First operand 406 states and 934 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:50,675 INFO L93 Difference]: Finished difference Result 820 states and 1742 transitions. [2021-06-01 20:49:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-01 20:49:50,675 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 [2021-06-01 20:49:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:50,677 INFO L225 Difference]: With dead ends: 820 [2021-06-01 20:49:50,677 INFO L226 Difference]: Without dead ends: 793 [2021-06-01 20:49:50,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 982.2ms TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2021-06-01 20:49:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-06-01 20:49:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 370. [2021-06-01 20:49:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.2086720867208673) internal successors, (815), 369 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 815 transitions. [2021-06-01 20:49:50,684 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 815 transitions. Word has length 27 [2021-06-01 20:49:50,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:50,685 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 815 transitions. [2021-06-01 20:49:50,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:50,685 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 815 transitions. [2021-06-01 20:49:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-01 20:49:50,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:50,685 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:50,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-01 20:49:50,901 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash -879273425, now seen corresponding path program 18 times [2021-06-01 20:49:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:50,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852945527] [2021-06-01 20:49:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:50,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852945527] [2021-06-01 20:49:50,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852945527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185332054] [2021-06-01 20:49:50,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:50,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 20:49:50,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-01 20:49:50,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:51,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185332054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:51,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:51,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-06-01 20:49:51,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152377815] [2021-06-01 20:49:51,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-01 20:49:51,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:51,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-01 20:49:51,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-01 20:49:51,143 INFO L87 Difference]: Start difference. First operand 370 states and 815 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:51,717 INFO L93 Difference]: Finished difference Result 790 states and 1683 transitions. [2021-06-01 20:49:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-01 20:49:51,717 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 27 [2021-06-01 20:49:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:51,719 INFO L225 Difference]: With dead ends: 790 [2021-06-01 20:49:51,719 INFO L226 Difference]: Without dead ends: 786 [2021-06-01 20:49:51,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 556.7ms TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2021-06-01 20:49:51,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-01 20:49:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 458. [2021-06-01 20:49:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2603938730853392) internal successors, (1033), 457 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1033 transitions. [2021-06-01 20:49:51,735 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1033 transitions. Word has length 27 [2021-06-01 20:49:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:51,735 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1033 transitions. [2021-06-01 20:49:51,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1033 transitions. [2021-06-01 20:49:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-01 20:49:51,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:51,736 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:51,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-01 20:49:51,949 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash -335260507, now seen corresponding path program 19 times [2021-06-01 20:49:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:51,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780252148] [2021-06-01 20:49:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:52,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:52,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780252148] [2021-06-01 20:49:52,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780252148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:52,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835397467] [2021-06-01 20:49:52,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:52,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-01 20:49:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:52,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835397467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:52,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:52,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-01 20:49:52,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532356430] [2021-06-01 20:49:52,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-01 20:49:52,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:52,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-01 20:49:52,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-01 20:49:52,344 INFO L87 Difference]: Start difference. First operand 458 states and 1033 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) [2021-06-01 20:49:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:53,099 INFO L93 Difference]: Finished difference Result 890 states and 1856 transitions. [2021-06-01 20:49:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-01 20:49:53,099 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 [2021-06-01 20:49:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:53,101 INFO L225 Difference]: With dead ends: 890 [2021-06-01 20:49:53,101 INFO L226 Difference]: Without dead ends: 890 [2021-06-01 20:49:53,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 748.9ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-06-01 20:49:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-06-01 20:49:53,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 490. [2021-06-01 20:49:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.276073619631902) internal successors, (1113), 489 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1113 transitions. [2021-06-01 20:49:53,109 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1113 transitions. Word has length 29 [2021-06-01 20:49:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:53,110 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1113 transitions. [2021-06-01 20:49:53,110 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) [2021-06-01 20:49:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1113 transitions. [2021-06-01 20:49:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-01 20:49:53,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:53,111 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:53,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:53,325 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2063984225, now seen corresponding path program 20 times [2021-06-01 20:49:53,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:53,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921956330] [2021-06-01 20:49:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:53,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:53,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921956330] [2021-06-01 20:49:53,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921956330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:53,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10131463] [2021-06-01 20:49:53,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:53,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:49:53,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-01 20:49:53,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:53,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10131463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:53,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:53,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-01 20:49:53,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550588197] [2021-06-01 20:49:53,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-01 20:49:53,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:53,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-01 20:49:53,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-01 20:49:53,604 INFO L87 Difference]: Start difference. First operand 490 states and 1113 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:54,514 INFO L93 Difference]: Finished difference Result 726 states and 1556 transitions. [2021-06-01 20:49:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-01 20:49:54,514 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 [2021-06-01 20:49:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:54,516 INFO L225 Difference]: With dead ends: 726 [2021-06-01 20:49:54,516 INFO L226 Difference]: Without dead ends: 722 [2021-06-01 20:49:54,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=1000, Invalid=3032, Unknown=0, NotChecked=0, Total=4032 [2021-06-01 20:49:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-01 20:49:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 458. [2021-06-01 20:49:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.25382932166302) internal successors, (1030), 457 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1030 transitions. [2021-06-01 20:49:54,523 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1030 transitions. Word has length 29 [2021-06-01 20:49:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:54,523 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1030 transitions. [2021-06-01 20:49:54,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1030 transitions. [2021-06-01 20:49:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-01 20:49:54,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:54,524 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:54,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-01 20:49:54,740 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:54,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2078249141, now seen corresponding path program 21 times [2021-06-01 20:49:54,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:54,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304187871] [2021-06-01 20:49:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:54,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304187871] [2021-06-01 20:49:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304187871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146543644] [2021-06-01 20:49:54,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:54,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-01 20:49:54,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-01 20:49:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:55,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146543644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:55,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:55,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-01 20:49:55,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235390731] [2021-06-01 20:49:55,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-01 20:49:55,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:55,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-01 20:49:55,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-06-01 20:49:55,305 INFO L87 Difference]: Start difference. First operand 458 states and 1030 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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) [2021-06-01 20:49:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:56,900 INFO L93 Difference]: Finished difference Result 705 states and 1525 transitions. [2021-06-01 20:49:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-01 20:49:56,900 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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 29 [2021-06-01 20:49:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:56,902 INFO L225 Difference]: With dead ends: 705 [2021-06-01 20:49:56,902 INFO L226 Difference]: Without dead ends: 684 [2021-06-01 20:49:56,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1597.6ms TimeCoverageRelationStatistics Valid=434, Invalid=3598, Unknown=0, NotChecked=0, Total=4032 [2021-06-01 20:49:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-01 20:49:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 473. [2021-06-01 20:49:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.264830508474576) internal successors, (1069), 472 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1069 transitions. [2021-06-01 20:49:56,910 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1069 transitions. Word has length 29 [2021-06-01 20:49:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:56,910 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1069 transitions. [2021-06-01 20:49:56,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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) [2021-06-01 20:49:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1069 transitions. [2021-06-01 20:49:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-01 20:49:56,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:56,910 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:57,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:57,125 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1384293639, now seen corresponding path program 22 times [2021-06-01 20:49:57,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:57,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019429626] [2021-06-01 20:49:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:57,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:57,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019429626] [2021-06-01 20:49:57,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019429626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:57,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813724700] [2021-06-01 20:49:57,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:57,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:49:57,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-01 20:49:57,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:49:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:57,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813724700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:57,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:49:57,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-01 20:49:57,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412895740] [2021-06-01 20:49:57,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:49:57,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:49:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:49:57,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:49:57,829 INFO L87 Difference]: Start difference. First operand 473 states and 1069 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-06-01 20:49:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:49:59,502 INFO L93 Difference]: Finished difference Result 761 states and 1640 transitions. [2021-06-01 20:49:59,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-01 20:49:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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 29 [2021-06-01 20:49:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:49:59,505 INFO L225 Difference]: With dead ends: 761 [2021-06-01 20:49:59,505 INFO L226 Difference]: Without dead ends: 749 [2021-06-01 20:49:59,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1609.6ms TimeCoverageRelationStatistics Valid=354, Invalid=3186, Unknown=0, NotChecked=0, Total=3540 [2021-06-01 20:49:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-01 20:49:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 517. [2021-06-01 20:49:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.294573643410853) internal successors, (1184), 516 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:49:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1184 transitions. [2021-06-01 20:49:59,512 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1184 transitions. Word has length 29 [2021-06-01 20:49:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:49:59,512 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1184 transitions. [2021-06-01 20:49:59,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-06-01 20:49:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1184 transitions. [2021-06-01 20:49:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-01 20:49:59,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:49:59,513 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:49:59,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:59,729 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:49:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:49:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1179903925, now seen corresponding path program 23 times [2021-06-01 20:49:59,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:49:59,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047911683] [2021-06-01 20:49:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:49:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:49:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:49:59,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:49:59,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047911683] [2021-06-01 20:49:59,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047911683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:49:59,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131799999] [2021-06-01 20:49:59,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:49:59,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 20:49:59,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:49:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-01 20:49:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:00,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131799999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:00,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:00,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-01 20:50:00,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349587988] [2021-06-01 20:50:00,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-01 20:50:00,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-01 20:50:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-01 20:50:00,303 INFO L87 Difference]: Start difference. First operand 517 states and 1184 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:02,005 INFO L93 Difference]: Finished difference Result 1009 states and 2157 transitions. [2021-06-01 20:50:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-01 20:50:02,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-01 20:50:02,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:02,008 INFO L225 Difference]: With dead ends: 1009 [2021-06-01 20:50:02,008 INFO L226 Difference]: Without dead ends: 975 [2021-06-01 20:50:02,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1571.4ms TimeCoverageRelationStatistics Valid=640, Invalid=3142, Unknown=0, NotChecked=0, Total=3782 [2021-06-01 20:50:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-01 20:50:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 489. [2021-06-01 20:50:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.2684426229508197) internal successors, (1107), 488 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1107 transitions. [2021-06-01 20:50:02,025 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1107 transitions. Word has length 29 [2021-06-01 20:50:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:02,025 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1107 transitions. [2021-06-01 20:50:02,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1107 transitions. [2021-06-01 20:50:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:02,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:02,026 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:02,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:02,241 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash -985517533, now seen corresponding path program 24 times [2021-06-01 20:50:02,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:02,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411773739] [2021-06-01 20:50:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:02,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411773739] [2021-06-01 20:50:02,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411773739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937422738] [2021-06-01 20:50:02,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:02,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-01 20:50:02,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:02,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-01 20:50:02,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:03,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937422738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:03,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:03,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:03,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439769227] [2021-06-01 20:50:03,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:03,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:03,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:03,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:03,036 INFO L87 Difference]: Start difference. First operand 489 states and 1107 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:04,294 INFO L93 Difference]: Finished difference Result 1174 states and 2556 transitions. [2021-06-01 20:50:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-01 20:50:04,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:04,297 INFO L225 Difference]: With dead ends: 1174 [2021-06-01 20:50:04,297 INFO L226 Difference]: Without dead ends: 1105 [2021-06-01 20:50:04,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1274.6ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-06-01 20:50:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-01 20:50:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 560. [2021-06-01 20:50:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.2772808586762077) internal successors, (1273), 559 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1273 transitions. [2021-06-01 20:50:04,319 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1273 transitions. Word has length 31 [2021-06-01 20:50:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:04,319 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1273 transitions. [2021-06-01 20:50:04,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1273 transitions. [2021-06-01 20:50:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:04,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:04,320 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:04,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:04,537 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1484862347, now seen corresponding path program 25 times [2021-06-01 20:50:04,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:04,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887561588] [2021-06-01 20:50:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:04,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:04,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887561588] [2021-06-01 20:50:04,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887561588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:04,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227157112] [2021-06-01 20:50:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:05,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227157112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:05,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:05,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:05,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935288847] [2021-06-01 20:50:05,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:05,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:05,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:05,272 INFO L87 Difference]: Start difference. First operand 560 states and 1273 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:06,389 INFO L93 Difference]: Finished difference Result 1108 states and 2432 transitions. [2021-06-01 20:50:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-01 20:50:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:06,392 INFO L225 Difference]: With dead ends: 1108 [2021-06-01 20:50:06,392 INFO L226 Difference]: Without dead ends: 1051 [2021-06-01 20:50:06,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1203.4ms TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2021-06-01 20:50:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-01 20:50:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 584. [2021-06-01 20:50:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2658662092624358) internal successors, (1321), 583 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1321 transitions. [2021-06-01 20:50:06,400 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1321 transitions. Word has length 31 [2021-06-01 20:50:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:06,400 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1321 transitions. [2021-06-01 20:50:06,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1321 transitions. [2021-06-01 20:50:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:06,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:06,401 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:06,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-01 20:50:06,613 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1890433653, now seen corresponding path program 26 times [2021-06-01 20:50:06,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:06,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379833033] [2021-06-01 20:50:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:06,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:06,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379833033] [2021-06-01 20:50:06,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379833033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:06,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975471730] [2021-06-01 20:50:06,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:06,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:50:06,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:06,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:06,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:07,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975471730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:07,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:07,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:07,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209792483] [2021-06-01 20:50:07,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:07,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:07,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:07,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:07,375 INFO L87 Difference]: Start difference. First operand 584 states and 1321 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:08,925 INFO L93 Difference]: Finished difference Result 1217 states and 2662 transitions. [2021-06-01 20:50:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 20:50:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:08,928 INFO L225 Difference]: With dead ends: 1217 [2021-06-01 20:50:08,928 INFO L226 Difference]: Without dead ends: 1175 [2021-06-01 20:50:08,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1580.3ms TimeCoverageRelationStatistics Valid=672, Invalid=3618, Unknown=0, NotChecked=0, Total=4290 [2021-06-01 20:50:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-01 20:50:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 651. [2021-06-01 20:50:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.272307692307692) internal successors, (1477), 650 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1477 transitions. [2021-06-01 20:50:08,937 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1477 transitions. Word has length 31 [2021-06-01 20:50:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:08,937 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 1477 transitions. [2021-06-01 20:50:08,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1477 transitions. [2021-06-01 20:50:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:08,938 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:08,938 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:09,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:09,157 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277999, now seen corresponding path program 27 times [2021-06-01 20:50:09,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:09,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702921388] [2021-06-01 20:50:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:09,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:09,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702921388] [2021-06-01 20:50:09,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702921388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:09,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128296291] [2021-06-01 20:50:09,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:09,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-01 20:50:09,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:09,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:09,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:09,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128296291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:09,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:09,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:09,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399587909] [2021-06-01 20:50:09,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:09,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:09,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:09,868 INFO L87 Difference]: Start difference. First operand 651 states and 1477 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:11,470 INFO L93 Difference]: Finished difference Result 1268 states and 2780 transitions. [2021-06-01 20:50:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-01 20:50:11,470 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:11,473 INFO L225 Difference]: With dead ends: 1268 [2021-06-01 20:50:11,473 INFO L226 Difference]: Without dead ends: 1199 [2021-06-01 20:50:11,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1554.4ms TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2021-06-01 20:50:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-01 20:50:11,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 655. [2021-06-01 20:50:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.270642201834862) internal successors, (1485), 654 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1485 transitions. [2021-06-01 20:50:11,482 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1485 transitions. Word has length 31 [2021-06-01 20:50:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:11,482 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1485 transitions. [2021-06-01 20:50:11,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1485 transitions. [2021-06-01 20:50:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:11,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:11,483 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:11,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-01 20:50:11,696 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:11,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:11,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1055606703, now seen corresponding path program 28 times [2021-06-01 20:50:11,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:11,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589764716] [2021-06-01 20:50:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:11,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:11,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589764716] [2021-06-01 20:50:11,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589764716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:11,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667249336] [2021-06-01 20:50:11,858 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) [2021-06-01 20:50:11,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:50:11,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:11,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:11,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667249336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:12,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:12,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:12,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144472309] [2021-06-01 20:50:12,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:12,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:12,380 INFO L87 Difference]: Start difference. First operand 655 states and 1485 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:14,339 INFO L93 Difference]: Finished difference Result 1427 states and 3120 transitions. [2021-06-01 20:50:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-01 20:50:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:14,343 INFO L225 Difference]: With dead ends: 1427 [2021-06-01 20:50:14,343 INFO L226 Difference]: Without dead ends: 1385 [2021-06-01 20:50:14,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1921.9ms TimeCoverageRelationStatistics Valid=819, Invalid=4151, Unknown=0, NotChecked=0, Total=4970 [2021-06-01 20:50:14,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-01 20:50:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 664. [2021-06-01 20:50:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.277526395173454) internal successors, (1510), 663 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1510 transitions. [2021-06-01 20:50:14,353 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1510 transitions. Word has length 31 [2021-06-01 20:50:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:14,353 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 1510 transitions. [2021-06-01 20:50:14,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1510 transitions. [2021-06-01 20:50:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:14,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:14,354 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:14,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:14,569 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash 766958067, now seen corresponding path program 29 times [2021-06-01 20:50:14,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:14,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922176858] [2021-06-01 20:50:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:14,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:14,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922176858] [2021-06-01 20:50:14,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922176858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:14,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876585642] [2021-06-01 20:50:14,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:14,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 20:50:14,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:15,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876585642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:15,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:15,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:15,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142619156] [2021-06-01 20:50:15,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:15,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:15,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:15,233 INFO L87 Difference]: Start difference. First operand 664 states and 1510 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:18,000 INFO L93 Difference]: Finished difference Result 1966 states and 4209 transitions. [2021-06-01 20:50:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-01 20:50:18,000 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:18,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:18,004 INFO L225 Difference]: With dead ends: 1966 [2021-06-01 20:50:18,004 INFO L226 Difference]: Without dead ends: 1908 [2021-06-01 20:50:18,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2733 ImplicationChecksByTransitivity, 2561.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=6912, Unknown=0, NotChecked=0, Total=8190 [2021-06-01 20:50:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-01 20:50:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 774. [2021-06-01 20:50:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.2923673997412677) internal successors, (1772), 773 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1772 transitions. [2021-06-01 20:50:18,017 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1772 transitions. Word has length 31 [2021-06-01 20:50:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:18,018 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1772 transitions. [2021-06-01 20:50:18,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1772 transitions. [2021-06-01 20:50:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:18,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:18,019 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:18,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-01 20:50:18,229 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash 497566775, now seen corresponding path program 30 times [2021-06-01 20:50:18,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:18,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082696521] [2021-06-01 20:50:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:18,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:18,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082696521] [2021-06-01 20:50:18,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082696521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:18,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911917695] [2021-06-01 20:50:18,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:18,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:50:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-01 20:50:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:18,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911917695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:18,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:18,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-01 20:50:18,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53577270] [2021-06-01 20:50:18,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-01 20:50:18,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:18,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-01 20:50:18,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-01 20:50:18,822 INFO L87 Difference]: Start difference. First operand 774 states and 1772 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:20,196 INFO L93 Difference]: Finished difference Result 1633 states and 3659 transitions. [2021-06-01 20:50:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-01 20:50:20,196 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 [2021-06-01 20:50:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:20,199 INFO L225 Difference]: With dead ends: 1633 [2021-06-01 20:50:20,199 INFO L226 Difference]: Without dead ends: 1633 [2021-06-01 20:50:20,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1347.0ms TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2021-06-01 20:50:20,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-06-01 20:50:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 814. [2021-06-01 20:50:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.2976629766297663) internal successors, (1868), 813 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1868 transitions. [2021-06-01 20:50:20,216 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1868 transitions. Word has length 31 [2021-06-01 20:50:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:20,216 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 1868 transitions. [2021-06-01 20:50:20,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1868 transitions. [2021-06-01 20:50:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:20,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:20,218 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:20,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:20,418 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:20,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1094746873, now seen corresponding path program 31 times [2021-06-01 20:50:20,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:20,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546219370] [2021-06-01 20:50:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:20,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:20,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546219370] [2021-06-01 20:50:20,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546219370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:20,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75838881] [2021-06-01 20:50:20,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:20,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-01 20:50:20,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:20,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75838881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:20,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:20,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-01 20:50:20,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993834038] [2021-06-01 20:50:20,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-01 20:50:20,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-01 20:50:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-01 20:50:20,957 INFO L87 Difference]: Start difference. First operand 814 states and 1868 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:24,258 INFO L93 Difference]: Finished difference Result 1582 states and 3436 transitions. [2021-06-01 20:50:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-01 20:50:24,258 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 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 31 [2021-06-01 20:50:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:24,263 INFO L225 Difference]: With dead ends: 1582 [2021-06-01 20:50:24,263 INFO L226 Difference]: Without dead ends: 1525 [2021-06-01 20:50:24,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2875.0ms TimeCoverageRelationStatistics Valid=908, Invalid=7464, Unknown=0, NotChecked=0, Total=8372 [2021-06-01 20:50:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-06-01 20:50:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 860. [2021-06-01 20:50:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.2980209545983703) internal successors, (1974), 859 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1974 transitions. [2021-06-01 20:50:24,277 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1974 transitions. Word has length 31 [2021-06-01 20:50:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:24,277 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 1974 transitions. [2021-06-01 20:50:24,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1974 transitions. [2021-06-01 20:50:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:24,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:24,278 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:24,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:24,489 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash 175075577, now seen corresponding path program 32 times [2021-06-01 20:50:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:24,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405172956] [2021-06-01 20:50:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:24,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405172956] [2021-06-01 20:50:24,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405172956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626166912] [2021-06-01 20:50:24,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:24,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:50:24,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:24,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:25,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626166912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:25,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:25,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:25,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658305214] [2021-06-01 20:50:25,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:25,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:25,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:25,190 INFO L87 Difference]: Start difference. First operand 860 states and 1974 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:28,418 INFO L93 Difference]: Finished difference Result 1889 states and 4109 transitions. [2021-06-01 20:50:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-01 20:50:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:28,421 INFO L225 Difference]: With dead ends: 1889 [2021-06-01 20:50:28,421 INFO L226 Difference]: Without dead ends: 1838 [2021-06-01 20:50:28,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 3076.6ms TimeCoverageRelationStatistics Valid=1421, Invalid=7891, Unknown=0, NotChecked=0, Total=9312 [2021-06-01 20:50:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-01 20:50:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 929. [2021-06-01 20:50:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.3168103448275863) internal successors, (2150), 928 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2150 transitions. [2021-06-01 20:50:28,435 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2150 transitions. Word has length 31 [2021-06-01 20:50:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:28,435 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2150 transitions. [2021-06-01 20:50:28,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2150 transitions. [2021-06-01 20:50:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:28,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:28,437 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:28,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-01 20:50:28,638 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1294394819, now seen corresponding path program 33 times [2021-06-01 20:50:28,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:28,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019154176] [2021-06-01 20:50:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:28,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019154176] [2021-06-01 20:50:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019154176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542841906] [2021-06-01 20:50:28,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:28,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-01 20:50:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:50:28,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:29,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542841906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:29,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:29,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-01 20:50:29,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850528968] [2021-06-01 20:50:29,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:50:29,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:50:29,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:50:29,175 INFO L87 Difference]: Start difference. First operand 929 states and 2150 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) [2021-06-01 20:50:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:30,462 INFO L93 Difference]: Finished difference Result 1635 states and 3656 transitions. [2021-06-01 20:50:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-01 20:50:30,462 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 [2021-06-01 20:50:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:30,464 INFO L225 Difference]: With dead ends: 1635 [2021-06-01 20:50:30,464 INFO L226 Difference]: Without dead ends: 1635 [2021-06-01 20:50:30,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1288.1ms TimeCoverageRelationStatistics Valid=631, Invalid=2675, Unknown=0, NotChecked=0, Total=3306 [2021-06-01 20:50:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-01 20:50:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 995. [2021-06-01 20:50:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.3158953722334004) internal successors, (2302), 994 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2302 transitions. [2021-06-01 20:50:30,478 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2302 transitions. Word has length 31 [2021-06-01 20:50:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:30,478 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2302 transitions. [2021-06-01 20:50:30,478 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) [2021-06-01 20:50:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2302 transitions. [2021-06-01 20:50:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:30,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:30,479 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:30,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:30,693 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 797857409, now seen corresponding path program 34 times [2021-06-01 20:50:30,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:30,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220058221] [2021-06-01 20:50:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:30,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:30,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220058221] [2021-06-01 20:50:30,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220058221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:30,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898292792] [2021-06-01 20:50:30,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:30,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:50:30,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:30,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:30,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:31,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898292792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:31,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:31,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-01 20:50:31,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170871661] [2021-06-01 20:50:31,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-01 20:50:31,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-01 20:50:31,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-01 20:50:31,322 INFO L87 Difference]: Start difference. First operand 995 states and 2302 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:34,491 INFO L93 Difference]: Finished difference Result 2696 states and 5900 transitions. [2021-06-01 20:50:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 20:50:34,491 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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 [2021-06-01 20:50:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:34,495 INFO L225 Difference]: With dead ends: 2696 [2021-06-01 20:50:34,495 INFO L226 Difference]: Without dead ends: 2642 [2021-06-01 20:50:34,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2826.8ms TimeCoverageRelationStatistics Valid=1212, Invalid=6444, Unknown=0, NotChecked=0, Total=7656 [2021-06-01 20:50:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-01 20:50:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1189. [2021-06-01 20:50:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.3526936026936025) internal successors, (2795), 1188 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2795 transitions. [2021-06-01 20:50:34,514 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2795 transitions. Word has length 31 [2021-06-01 20:50:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:34,514 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 2795 transitions. [2021-06-01 20:50:34,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2795 transitions. [2021-06-01 20:50:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:34,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:34,516 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:34,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-01 20:50:34,732 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash 67491499, now seen corresponding path program 35 times [2021-06-01 20:50:34,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:34,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717984388] [2021-06-01 20:50:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:34,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:34,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717984388] [2021-06-01 20:50:34,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717984388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:34,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191680291] [2021-06-01 20:50:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:34,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 20:50:34,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-01 20:50:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:50:35,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191680291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:35,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:35,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-01 20:50:35,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367553953] [2021-06-01 20:50:35,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-01 20:50:35,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:35,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-01 20:50:35,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-01 20:50:35,012 INFO L87 Difference]: Start difference. First operand 1189 states and 2795 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-06-01 20:50:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:36,947 INFO L93 Difference]: Finished difference Result 2304 states and 5171 transitions. [2021-06-01 20:50:36,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-01 20:50:36,948 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 31 [2021-06-01 20:50:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:36,951 INFO L225 Difference]: With dead ends: 2304 [2021-06-01 20:50:36,951 INFO L226 Difference]: Without dead ends: 2208 [2021-06-01 20:50:36,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1609.7ms TimeCoverageRelationStatistics Valid=1219, Invalid=6263, Unknown=0, NotChecked=0, Total=7482 [2021-06-01 20:50:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-01 20:50:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1478. [2021-06-01 20:50:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.360866621530129) internal successors, (3487), 1477 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:36,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3487 transitions. [2021-06-01 20:50:36,972 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3487 transitions. Word has length 31 [2021-06-01 20:50:36,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:36,972 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3487 transitions. [2021-06-01 20:50:36,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-06-01 20:50:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3487 transitions. [2021-06-01 20:50:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:36,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:36,974 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:37,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:37,193 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash 735083257, now seen corresponding path program 36 times [2021-06-01 20:50:37,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:37,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400781344] [2021-06-01 20:50:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:37,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:37,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400781344] [2021-06-01 20:50:37,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400781344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:37,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676940997] [2021-06-01 20:50:37,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:37,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:50:37,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 20:50:37,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:37,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676940997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:37,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:37,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-01 20:50:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956300838] [2021-06-01 20:50:37,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:37,869 INFO L87 Difference]: Start difference. First operand 1478 states and 3487 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:40,108 INFO L93 Difference]: Finished difference Result 2856 states and 6422 transitions. [2021-06-01 20:50:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-01 20:50:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:40,112 INFO L225 Difference]: With dead ends: 2856 [2021-06-01 20:50:40,112 INFO L226 Difference]: Without dead ends: 2771 [2021-06-01 20:50:40,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 2238.9ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-06-01 20:50:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-06-01 20:50:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1636. [2021-06-01 20:50:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.3559633027522935) internal successors, (3852), 1635 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 3852 transitions. [2021-06-01 20:50:40,134 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 3852 transitions. Word has length 31 [2021-06-01 20:50:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:40,134 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 3852 transitions. [2021-06-01 20:50:40,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 3852 transitions. [2021-06-01 20:50:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:40,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:40,136 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:40,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-01 20:50:40,345 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1903077501, now seen corresponding path program 37 times [2021-06-01 20:50:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:40,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856037121] [2021-06-01 20:50:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:40,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:40,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856037121] [2021-06-01 20:50:40,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856037121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:40,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419251429] [2021-06-01 20:50:40,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:41,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419251429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:41,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:41,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:41,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360099558] [2021-06-01 20:50:41,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:41,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:41,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:41,100 INFO L87 Difference]: Start difference. First operand 1636 states and 3852 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:44,982 INFO L93 Difference]: Finished difference Result 3900 states and 8693 transitions. [2021-06-01 20:50:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-01 20:50:44,982 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:44,987 INFO L225 Difference]: With dead ends: 3900 [2021-06-01 20:50:44,987 INFO L226 Difference]: Without dead ends: 3784 [2021-06-01 20:50:44,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 3508.0ms TimeCoverageRelationStatistics Valid=1538, Invalid=10452, Unknown=0, NotChecked=0, Total=11990 [2021-06-01 20:50:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2021-06-01 20:50:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 1899. [2021-06-01 20:50:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.403582718651212) internal successors, (4562), 1898 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 4562 transitions. [2021-06-01 20:50:45,014 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 4562 transitions. Word has length 31 [2021-06-01 20:50:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:45,014 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 4562 transitions. [2021-06-01 20:50:45,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 4562 transitions. [2021-06-01 20:50:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:45,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:45,016 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:45,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-01 20:50:45,232 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:45,232 INFO L82 PathProgramCache]: Analyzing trace with hash 983406205, now seen corresponding path program 38 times [2021-06-01 20:50:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:45,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139336906] [2021-06-01 20:50:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:45,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:45,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139336906] [2021-06-01 20:50:45,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139336906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:45,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249125126] [2021-06-01 20:50:45,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:45,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:50:45,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-01 20:50:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:45,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249125126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:45,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:45,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:50:45,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48017326] [2021-06-01 20:50:45,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:50:45,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:45,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:50:45,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:50:45,937 INFO L87 Difference]: Start difference. First operand 1899 states and 4562 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:49,184 INFO L93 Difference]: Finished difference Result 3505 states and 7977 transitions. [2021-06-01 20:50:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-01 20:50:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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 [2021-06-01 20:50:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:49,187 INFO L225 Difference]: With dead ends: 3505 [2021-06-01 20:50:49,187 INFO L226 Difference]: Without dead ends: 3426 [2021-06-01 20:50:49,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 3034.4ms TimeCoverageRelationStatistics Valid=1212, Invalid=7530, Unknown=0, NotChecked=0, Total=8742 [2021-06-01 20:50:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-06-01 20:50:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1879. [2021-06-01 20:50:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 2.3998935037273696) internal successors, (4507), 1878 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 4507 transitions. [2021-06-01 20:50:49,211 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 4507 transitions. Word has length 31 [2021-06-01 20:50:49,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:49,212 INFO L482 AbstractCegarLoop]: Abstraction has 1879 states and 4507 transitions. [2021-06-01 20:50:49,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 4507 transitions. [2021-06-01 20:50:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:49,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:49,214 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:49,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-01 20:50:49,429 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash -486064191, now seen corresponding path program 39 times [2021-06-01 20:50:49,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:49,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292373391] [2021-06-01 20:50:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:50:49,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:49,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292373391] [2021-06-01 20:50:49,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292373391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:49,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230688444] [2021-06-01 20:50:49,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:49,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:50:49,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-01 20:50:49,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:49,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230688444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:49,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:49,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-01 20:50:49,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203372594] [2021-06-01 20:50:49,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:50:49,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:50:49,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:50:49,963 INFO L87 Difference]: Start difference. First operand 1879 states and 4507 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) [2021-06-01 20:50:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:51,610 INFO L93 Difference]: Finished difference Result 3076 states and 7034 transitions. [2021-06-01 20:50:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:50:51,611 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 [2021-06-01 20:50:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:51,613 INFO L225 Difference]: With dead ends: 3076 [2021-06-01 20:50:51,614 INFO L226 Difference]: Without dead ends: 3052 [2021-06-01 20:50:51,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1592.2ms TimeCoverageRelationStatistics Valid=823, Invalid=3337, Unknown=0, NotChecked=0, Total=4160 [2021-06-01 20:50:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-06-01 20:50:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1766. [2021-06-01 20:50:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.3507082152974506) internal successors, (4149), 1765 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4149 transitions. [2021-06-01 20:50:51,636 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4149 transitions. Word has length 31 [2021-06-01 20:50:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:51,636 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4149 transitions. [2021-06-01 20:50:51,636 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) [2021-06-01 20:50:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4149 transitions. [2021-06-01 20:50:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-01 20:50:51,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:51,638 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:51,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-01 20:50:51,839 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2101275627, now seen corresponding path program 40 times [2021-06-01 20:50:51,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:51,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011792170] [2021-06-01 20:50:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:51,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:51,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011792170] [2021-06-01 20:50:51,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011792170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:51,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392976488] [2021-06-01 20:50:51,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:51,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:50:51,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:51,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-01 20:50:51,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:52,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392976488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:52,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:52,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-01 20:50:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259633711] [2021-06-01 20:50:52,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-01 20:50:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:52,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-01 20:50:52,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-01 20:50:52,266 INFO L87 Difference]: Start difference. First operand 1766 states and 4149 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) [2021-06-01 20:50:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:53,277 INFO L93 Difference]: Finished difference Result 2592 states and 5918 transitions. [2021-06-01 20:50:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:50:53,277 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 [2021-06-01 20:50:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:53,279 INFO L225 Difference]: With dead ends: 2592 [2021-06-01 20:50:53,280 INFO L226 Difference]: Without dead ends: 2588 [2021-06-01 20:50:53,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 922.1ms TimeCoverageRelationStatistics Valid=776, Invalid=3256, Unknown=0, NotChecked=0, Total=4032 [2021-06-01 20:50:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-01 20:50:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1706. [2021-06-01 20:50:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.3530791788856305) internal successors, (4012), 1705 states have internal predecessors, (4012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 4012 transitions. [2021-06-01 20:50:53,301 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 4012 transitions. Word has length 31 [2021-06-01 20:50:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:53,301 INFO L482 AbstractCegarLoop]: Abstraction has 1706 states and 4012 transitions. [2021-06-01 20:50:53,301 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) [2021-06-01 20:50:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 4012 transitions. [2021-06-01 20:50:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:50:53,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:53,303 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:53,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:53,513 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:53,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1605471457, now seen corresponding path program 41 times [2021-06-01 20:50:53,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:53,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151427112] [2021-06-01 20:50:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:53,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:53,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151427112] [2021-06-01 20:50:53,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151427112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:53,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323971981] [2021-06-01 20:50:53,595 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:53,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:50:53,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-01 20:50:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:53,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323971981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:53,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:53,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-01 20:50:53,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779325044] [2021-06-01 20:50:53,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-01 20:50:53,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-01 20:50:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-01 20:50:53,926 INFO L87 Difference]: Start difference. First operand 1706 states and 4012 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:55,017 INFO L93 Difference]: Finished difference Result 3118 states and 6999 transitions. [2021-06-01 20:50:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-01 20:50:55,017 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 [2021-06-01 20:50:55,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:55,020 INFO L225 Difference]: With dead ends: 3118 [2021-06-01 20:50:55,020 INFO L226 Difference]: Without dead ends: 3109 [2021-06-01 20:50:55,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 994.0ms TimeCoverageRelationStatistics Valid=1134, Invalid=3836, Unknown=0, NotChecked=0, Total=4970 [2021-06-01 20:50:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-06-01 20:50:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1341. [2021-06-01 20:50:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.2753731343283583) internal successors, (3049), 1340 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3049 transitions. [2021-06-01 20:50:55,039 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3049 transitions. Word has length 33 [2021-06-01 20:50:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:55,039 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3049 transitions. [2021-06-01 20:50:55,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:55,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3049 transitions. [2021-06-01 20:50:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:50:55,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:55,041 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:55,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-01 20:50:55,257 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash -755955681, now seen corresponding path program 42 times [2021-06-01 20:50:55,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:55,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485735824] [2021-06-01 20:50:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:55,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:55,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485735824] [2021-06-01 20:50:55,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485735824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:55,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264470106] [2021-06-01 20:50:55,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:55,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-01 20:50:55,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:50:55,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-01 20:50:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:55,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264470106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:55,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:55,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2021-06-01 20:50:55,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827959707] [2021-06-01 20:50:55,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-01 20:50:55,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-01 20:50:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-01 20:50:55,571 INFO L87 Difference]: Start difference. First operand 1341 states and 3049 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:50:57,053 INFO L93 Difference]: Finished difference Result 1686 states and 3705 transitions. [2021-06-01 20:50:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 20:50:57,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 [2021-06-01 20:50:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:50:57,055 INFO L225 Difference]: With dead ends: 1686 [2021-06-01 20:50:57,055 INFO L226 Difference]: Without dead ends: 1682 [2021-06-01 20:50:57,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1400.1ms TimeCoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2021-06-01 20:50:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-01 20:50:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 953. [2021-06-01 20:50:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.277310924369748) internal successors, (2168), 952 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2168 transitions. [2021-06-01 20:50:57,065 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2168 transitions. Word has length 33 [2021-06-01 20:50:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:50:57,065 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2168 transitions. [2021-06-01 20:50:57,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:50:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2168 transitions. [2021-06-01 20:50:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:50:57,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:50:57,066 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:50:57,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:57,272 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:50:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:50:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1705903345, now seen corresponding path program 43 times [2021-06-01 20:50:57,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:50:57,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508488592] [2021-06-01 20:50:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:50:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:57,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:50:57,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508488592] [2021-06-01 20:50:57,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508488592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:57,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172490966] [2021-06-01 20:50:57,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:50:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:50:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:50:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:50:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:50:58,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172490966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:50:58,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:50:58,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-01 20:50:58,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829564625] [2021-06-01 20:50:58,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:50:58,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:50:58,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:50:58,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:50:58,059 INFO L87 Difference]: Start difference. First operand 953 states and 2168 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:00,097 INFO L93 Difference]: Finished difference Result 1262 states and 2779 transitions. [2021-06-01 20:51:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:51:00,098 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:00,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:00,099 INFO L225 Difference]: With dead ends: 1262 [2021-06-01 20:51:00,099 INFO L226 Difference]: Without dead ends: 1211 [2021-06-01 20:51:00,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2079.0ms TimeCoverageRelationStatistics Valid=429, Invalid=4401, Unknown=0, NotChecked=0, Total=4830 [2021-06-01 20:51:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-06-01 20:51:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 997. [2021-06-01 20:51:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.2710843373493974) internal successors, (2262), 996 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2262 transitions. [2021-06-01 20:51:00,108 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2262 transitions. Word has length 33 [2021-06-01 20:51:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:00,108 INFO L482 AbstractCegarLoop]: Abstraction has 997 states and 2262 transitions. [2021-06-01 20:51:00,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2262 transitions. [2021-06-01 20:51:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:00,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:00,109 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:00,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:00,325 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:00,325 INFO L82 PathProgramCache]: Analyzing trace with hash -660596615, now seen corresponding path program 44 times [2021-06-01 20:51:00,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:00,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205084939] [2021-06-01 20:51:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:00,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:00,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205084939] [2021-06-01 20:51:00,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205084939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:00,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490873045] [2021-06-01 20:51:00,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:00,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:51:00,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:51:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:01,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490873045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:01,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:01,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-01 20:51:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264028307] [2021-06-01 20:51:01,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:01,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:01,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:01,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:01,110 INFO L87 Difference]: Start difference. First operand 997 states and 2262 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:04,050 INFO L93 Difference]: Finished difference Result 1563 states and 3372 transitions. [2021-06-01 20:51:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-01 20:51:04,050 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:04,051 INFO L225 Difference]: With dead ends: 1563 [2021-06-01 20:51:04,051 INFO L226 Difference]: Without dead ends: 1473 [2021-06-01 20:51:04,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2680.8ms TimeCoverageRelationStatistics Valid=718, Invalid=8024, Unknown=0, NotChecked=0, Total=8742 [2021-06-01 20:51:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-06-01 20:51:04,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1042. [2021-06-01 20:51:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2632084534101824) internal successors, (2356), 1041 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2356 transitions. [2021-06-01 20:51:04,061 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2356 transitions. Word has length 33 [2021-06-01 20:51:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:04,061 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2356 transitions. [2021-06-01 20:51:04,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2356 transitions. [2021-06-01 20:51:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:04,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:04,063 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:04,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-01 20:51:04,272 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1395928629, now seen corresponding path program 45 times [2021-06-01 20:51:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:04,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403459473] [2021-06-01 20:51:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:04,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:04,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403459473] [2021-06-01 20:51:04,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403459473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:04,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281694516] [2021-06-01 20:51:04,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:04,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:51:04,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:04,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:51:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:04,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281694516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:04,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:04,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-01 20:51:04,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249264492] [2021-06-01 20:51:04,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:04,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:04,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:04,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:04,949 INFO L87 Difference]: Start difference. First operand 1042 states and 2356 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:08,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:08,135 INFO L93 Difference]: Finished difference Result 1689 states and 3627 transitions. [2021-06-01 20:51:08,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-01 20:51:08,136 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:08,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:08,137 INFO L225 Difference]: With dead ends: 1689 [2021-06-01 20:51:08,137 INFO L226 Difference]: Without dead ends: 1674 [2021-06-01 20:51:08,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 2819.2ms TimeCoverageRelationStatistics Valid=809, Invalid=9697, Unknown=0, NotChecked=0, Total=10506 [2021-06-01 20:51:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-01 20:51:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1087. [2021-06-01 20:51:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.2808471454880292) internal successors, (2477), 1086 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2477 transitions. [2021-06-01 20:51:08,148 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2477 transitions. Word has length 33 [2021-06-01 20:51:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:08,148 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 2477 transitions. [2021-06-01 20:51:08,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2477 transitions. [2021-06-01 20:51:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:08,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:08,150 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:08,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:08,350 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2066614151, now seen corresponding path program 46 times [2021-06-01 20:51:08,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:08,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831224409] [2021-06-01 20:51:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:08,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:08,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831224409] [2021-06-01 20:51:08,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831224409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:08,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198492432] [2021-06-01 20:51:08,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:08,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:51:08,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:08,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-01 20:51:08,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:09,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198492432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:09,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:09,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-01 20:51:09,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606360727] [2021-06-01 20:51:09,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:09,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:09,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:09,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:09,077 INFO L87 Difference]: Start difference. First operand 1087 states and 2477 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:11,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:11,073 INFO L93 Difference]: Finished difference Result 1528 states and 3365 transitions. [2021-06-01 20:51:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-01 20:51:11,074 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 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 [2021-06-01 20:51:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:11,075 INFO L225 Difference]: With dead ends: 1528 [2021-06-01 20:51:11,075 INFO L226 Difference]: Without dead ends: 1519 [2021-06-01 20:51:11,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1860.7ms TimeCoverageRelationStatistics Valid=674, Invalid=5806, Unknown=0, NotChecked=0, Total=6480 [2021-06-01 20:51:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-01 20:51:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1171. [2021-06-01 20:51:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.288034188034188) internal successors, (2677), 1170 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2677 transitions. [2021-06-01 20:51:11,086 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2677 transitions. Word has length 33 [2021-06-01 20:51:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:11,086 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2677 transitions. [2021-06-01 20:51:11,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2677 transitions. [2021-06-01 20:51:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:11,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:11,088 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:11,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:11,303 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:11,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:11,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2099610557, now seen corresponding path program 47 times [2021-06-01 20:51:11,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:11,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955381020] [2021-06-01 20:51:11,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:11,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:11,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955381020] [2021-06-01 20:51:11,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955381020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:11,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545874080] [2021-06-01 20:51:11,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:11,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:51:11,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:11,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:51:11,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:11,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545874080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:11,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:11,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-01 20:51:11,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236306685] [2021-06-01 20:51:11,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:11,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:11,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:11,988 INFO L87 Difference]: Start difference. First operand 1171 states and 2677 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:16,215 INFO L93 Difference]: Finished difference Result 1919 states and 4191 transitions. [2021-06-01 20:51:16,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-01 20:51:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:16,217 INFO L225 Difference]: With dead ends: 1919 [2021-06-01 20:51:16,217 INFO L226 Difference]: Without dead ends: 1913 [2021-06-01 20:51:16,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3681.8ms TimeCoverageRelationStatistics Valid=1082, Invalid=9630, Unknown=0, NotChecked=0, Total=10712 [2021-06-01 20:51:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-01 20:51:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1267. [2021-06-01 20:51:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.3183254344391786) internal successors, (2935), 1266 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2935 transitions. [2021-06-01 20:51:16,230 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2935 transitions. Word has length 33 [2021-06-01 20:51:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:16,230 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 2935 transitions. [2021-06-01 20:51:16,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2935 transitions. [2021-06-01 20:51:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:16,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:16,232 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:16,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:16,432 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1545287769, now seen corresponding path program 48 times [2021-06-01 20:51:16,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:16,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916672865] [2021-06-01 20:51:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:16,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:16,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916672865] [2021-06-01 20:51:16,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916672865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:16,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211473644] [2021-06-01 20:51:16,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:16,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:51:16,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:16,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-01 20:51:16,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:17,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211473644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:17,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:17,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-01 20:51:17,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711247810] [2021-06-01 20:51:17,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:17,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:17,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:17,253 INFO L87 Difference]: Start difference. First operand 1267 states and 2935 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:19,528 INFO L93 Difference]: Finished difference Result 1626 states and 3636 transitions. [2021-06-01 20:51:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-01 20:51:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:19,529 INFO L225 Difference]: With dead ends: 1626 [2021-06-01 20:51:19,530 INFO L226 Difference]: Without dead ends: 1611 [2021-06-01 20:51:19,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2179.7ms TimeCoverageRelationStatistics Valid=560, Invalid=4552, Unknown=0, NotChecked=0, Total=5112 [2021-06-01 20:51:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-06-01 20:51:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1287. [2021-06-01 20:51:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3195956454121305) internal successors, (2983), 1286 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2983 transitions. [2021-06-01 20:51:19,542 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2983 transitions. Word has length 33 [2021-06-01 20:51:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:19,542 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2983 transitions. [2021-06-01 20:51:19,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2983 transitions. [2021-06-01 20:51:19,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:19,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:19,544 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:19,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:19,744 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:19,744 INFO L82 PathProgramCache]: Analyzing trace with hash 497583413, now seen corresponding path program 49 times [2021-06-01 20:51:19,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:19,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369914941] [2021-06-01 20:51:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:19,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:19,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369914941] [2021-06-01 20:51:19,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369914941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:19,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864586670] [2021-06-01 20:51:19,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:19,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:51:19,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:20,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864586670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:20,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:20,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-06-01 20:51:20,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459591173] [2021-06-01 20:51:20,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-01 20:51:20,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-01 20:51:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-01 20:51:20,277 INFO L87 Difference]: Start difference. First operand 1287 states and 2983 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:21,984 INFO L93 Difference]: Finished difference Result 1934 states and 4341 transitions. [2021-06-01 20:51:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-01 20:51:21,985 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:21,987 INFO L225 Difference]: With dead ends: 1934 [2021-06-01 20:51:21,987 INFO L226 Difference]: Without dead ends: 1918 [2021-06-01 20:51:21,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1588.9ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-06-01 20:51:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-01 20:51:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1287. [2021-06-01 20:51:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3149300155520995) internal successors, (2977), 1286 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2977 transitions. [2021-06-01 20:51:22,005 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2977 transitions. Word has length 33 [2021-06-01 20:51:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:22,005 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2977 transitions. [2021-06-01 20:51:22,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2977 transitions. [2021-06-01 20:51:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:22,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:22,006 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:22,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:22,219 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:22,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:22,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1527671729, now seen corresponding path program 50 times [2021-06-01 20:51:22,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:22,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855154966] [2021-06-01 20:51:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:22,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:22,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855154966] [2021-06-01 20:51:22,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855154966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:22,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100490607] [2021-06-01 20:51:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:22,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:51:22,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:22,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-01 20:51:22,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:23,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100490607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:23,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:23,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-01 20:51:23,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027744669] [2021-06-01 20:51:23,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-01 20:51:23,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-01 20:51:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 20:51:23,223 INFO L87 Difference]: Start difference. First operand 1287 states and 2977 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:25,332 INFO L93 Difference]: Finished difference Result 1543 states and 3469 transitions. [2021-06-01 20:51:25,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 20:51:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:25,333 INFO L225 Difference]: With dead ends: 1543 [2021-06-01 20:51:25,333 INFO L226 Difference]: Without dead ends: 1491 [2021-06-01 20:51:25,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2191.7ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-06-01 20:51:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-01 20:51:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1288. [2021-06-01 20:51:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 2.312354312354312) internal successors, (2976), 1287 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2976 transitions. [2021-06-01 20:51:25,345 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2976 transitions. Word has length 33 [2021-06-01 20:51:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:25,345 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 2976 transitions. [2021-06-01 20:51:25,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2976 transitions. [2021-06-01 20:51:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:25,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:25,346 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:25,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-01 20:51:25,547 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:25,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1040701503, now seen corresponding path program 51 times [2021-06-01 20:51:25,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:25,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94658794] [2021-06-01 20:51:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:25,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:25,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94658794] [2021-06-01 20:51:25,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94658794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:25,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915535755] [2021-06-01 20:51:25,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:25,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:51:25,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:25,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:51:25,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:26,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915535755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:26,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:26,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-01 20:51:26,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879867750] [2021-06-01 20:51:26,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:26,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:26,344 INFO L87 Difference]: Start difference. First operand 1288 states and 2976 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:30,142 INFO L93 Difference]: Finished difference Result 1720 states and 3833 transitions. [2021-06-01 20:51:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-01 20:51:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:30,144 INFO L225 Difference]: With dead ends: 1720 [2021-06-01 20:51:30,144 INFO L226 Difference]: Without dead ends: 1654 [2021-06-01 20:51:30,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 3505.0ms TimeCoverageRelationStatistics Valid=647, Invalid=8665, Unknown=0, NotChecked=0, Total=9312 [2021-06-01 20:51:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-06-01 20:51:30,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1395. [2021-06-01 20:51:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.317790530846485) internal successors, (3231), 1394 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3231 transitions. [2021-06-01 20:51:30,157 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3231 transitions. Word has length 33 [2021-06-01 20:51:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:30,157 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3231 transitions. [2021-06-01 20:51:30,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3231 transitions. [2021-06-01 20:51:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:30,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:30,158 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:30,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-01 20:51:30,359 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:30,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1325798457, now seen corresponding path program 52 times [2021-06-01 20:51:30,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:30,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125665289] [2021-06-01 20:51:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:30,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:30,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125665289] [2021-06-01 20:51:30,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125665289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:30,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946370638] [2021-06-01 20:51:30,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:30,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:51:30,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:51:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:31,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946370638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:31,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:31,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-01 20:51:31,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236356022] [2021-06-01 20:51:31,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:31,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:31,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:31,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:31,115 INFO L87 Difference]: Start difference. First operand 1395 states and 3231 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:36,641 INFO L93 Difference]: Finished difference Result 1758 states and 3924 transitions. [2021-06-01 20:51:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-01 20:51:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:36,643 INFO L225 Difference]: With dead ends: 1758 [2021-06-01 20:51:36,643 INFO L226 Difference]: Without dead ends: 1734 [2021-06-01 20:51:36,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4515 ImplicationChecksByTransitivity, 5085.5ms TimeCoverageRelationStatistics Valid=947, Invalid=13095, Unknown=0, NotChecked=0, Total=14042 [2021-06-01 20:51:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-01 20:51:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1409. [2021-06-01 20:51:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.321022727272727) internal successors, (3268), 1408 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 3268 transitions. [2021-06-01 20:51:36,656 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 3268 transitions. Word has length 33 [2021-06-01 20:51:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:36,656 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 3268 transitions. [2021-06-01 20:51:36,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 3268 transitions. [2021-06-01 20:51:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:36,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:36,658 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:36,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-01 20:51:36,873 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1454541045, now seen corresponding path program 53 times [2021-06-01 20:51:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:36,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862894252] [2021-06-01 20:51:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:37,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:37,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862894252] [2021-06-01 20:51:37,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862894252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:37,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876907646] [2021-06-01 20:51:37,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:37,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:51:37,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:37,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-01 20:51:37,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:37,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876907646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:37,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:37,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-01 20:51:37,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721317871] [2021-06-01 20:51:37,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:37,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:37,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:37,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:37,744 INFO L87 Difference]: Start difference. First operand 1409 states and 3268 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:40,490 INFO L93 Difference]: Finished difference Result 2073 states and 4601 transitions. [2021-06-01 20:51:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-01 20:51:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 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 [2021-06-01 20:51:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:40,492 INFO L225 Difference]: With dead ends: 2073 [2021-06-01 20:51:40,492 INFO L226 Difference]: Without dead ends: 2070 [2021-06-01 20:51:40,493 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2706.0ms TimeCoverageRelationStatistics Valid=756, Invalid=6216, Unknown=0, NotChecked=0, Total=6972 [2021-06-01 20:51:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-01 20:51:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1510. [2021-06-01 20:51:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.3459244532803183) internal successors, (3540), 1509 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 3540 transitions. [2021-06-01 20:51:40,512 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 3540 transitions. Word has length 33 [2021-06-01 20:51:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:40,512 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 3540 transitions. [2021-06-01 20:51:40,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 3540 transitions. [2021-06-01 20:51:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:40,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:40,514 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:40,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-01 20:51:40,729 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash 121030207, now seen corresponding path program 54 times [2021-06-01 20:51:40,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:40,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127181676] [2021-06-01 20:51:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:41,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:41,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127181676] [2021-06-01 20:51:41,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127181676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:41,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180669095] [2021-06-01 20:51:41,184 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) [2021-06-01 20:51:41,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:51:41,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:41,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-01 20:51:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180669095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:41,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:41,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-01 20:51:41,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371086905] [2021-06-01 20:51:41,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-01 20:51:41,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-01 20:51:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-01 20:51:41,955 INFO L87 Difference]: Start difference. First operand 1510 states and 3540 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:44,713 INFO L93 Difference]: Finished difference Result 2367 states and 5373 transitions. [2021-06-01 20:51:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:51:44,713 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:44,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:44,715 INFO L225 Difference]: With dead ends: 2367 [2021-06-01 20:51:44,715 INFO L226 Difference]: Without dead ends: 2333 [2021-06-01 20:51:44,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2935.4ms TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2021-06-01 20:51:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-01 20:51:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1622. [2021-06-01 20:51:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 2.338679827267119) internal successors, (3791), 1621 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 3791 transitions. [2021-06-01 20:51:44,731 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 3791 transitions. Word has length 33 [2021-06-01 20:51:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:44,732 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 3791 transitions. [2021-06-01 20:51:44,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 3791 transitions. [2021-06-01 20:51:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:44,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:44,733 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:44,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-01 20:51:44,934 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:44,934 INFO L82 PathProgramCache]: Analyzing trace with hash -167618429, now seen corresponding path program 55 times [2021-06-01 20:51:44,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:44,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119052784] [2021-06-01 20:51:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:45,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:45,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119052784] [2021-06-01 20:51:45,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119052784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:45,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690703895] [2021-06-01 20:51:45,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-01 20:51:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:45,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690703895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:45,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:45,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-01 20:51:45,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408146312] [2021-06-01 20:51:45,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-01 20:51:45,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:45,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-01 20:51:45,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-01 20:51:45,704 INFO L87 Difference]: Start difference. First operand 1622 states and 3791 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:48,814 INFO L93 Difference]: Finished difference Result 2788 states and 6296 transitions. [2021-06-01 20:51:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-01 20:51:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:48,817 INFO L225 Difference]: With dead ends: 2788 [2021-06-01 20:51:48,817 INFO L226 Difference]: Without dead ends: 2754 [2021-06-01 20:51:48,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2876.0ms TimeCoverageRelationStatistics Valid=761, Invalid=4939, Unknown=0, NotChecked=0, Total=5700 [2021-06-01 20:51:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-06-01 20:51:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1754. [2021-06-01 20:51:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 2.3462635482030803) internal successors, (4113), 1753 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 4113 transitions. [2021-06-01 20:51:48,837 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 4113 transitions. Word has length 33 [2021-06-01 20:51:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:48,837 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 4113 transitions. [2021-06-01 20:51:48,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 4113 transitions. [2021-06-01 20:51:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:48,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:48,839 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:49,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:49,039 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:49,040 INFO L82 PathProgramCache]: Analyzing trace with hash 534308859, now seen corresponding path program 56 times [2021-06-01 20:51:49,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:49,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117782394] [2021-06-01 20:51:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:49,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:49,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117782394] [2021-06-01 20:51:49,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117782394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:49,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653888748] [2021-06-01 20:51:49,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:49,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:51:49,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:49,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:51:49,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:49,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653888748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:49,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:49,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-01 20:51:49,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012413761] [2021-06-01 20:51:49,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:49,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:49,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:49,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:49,947 INFO L87 Difference]: Start difference. First operand 1754 states and 4113 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:51,940 INFO L93 Difference]: Finished difference Result 2147 states and 4872 transitions. [2021-06-01 20:51:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-01 20:51:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 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 [2021-06-01 20:51:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:51,942 INFO L225 Difference]: With dead ends: 2147 [2021-06-01 20:51:51,943 INFO L226 Difference]: Without dead ends: 2126 [2021-06-01 20:51:51,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1844.2ms TimeCoverageRelationStatistics Valid=340, Invalid=4082, Unknown=0, NotChecked=0, Total=4422 [2021-06-01 20:51:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-01 20:51:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1806. [2021-06-01 20:51:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.3473684210526318) internal successors, (4237), 1805 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 4237 transitions. [2021-06-01 20:51:51,960 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 4237 transitions. Word has length 33 [2021-06-01 20:51:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:51,960 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 4237 transitions. [2021-06-01 20:51:51,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 4237 transitions. [2021-06-01 20:51:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:51,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:51,962 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:52,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:52,173 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:52,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1630351679, now seen corresponding path program 57 times [2021-06-01 20:51:52,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:52,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419090761] [2021-06-01 20:51:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:52,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:52,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419090761] [2021-06-01 20:51:52,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419090761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:52,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340495474] [2021-06-01 20:51:52,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:52,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-01 20:51:52,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-01 20:51:52,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:53,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340495474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:53,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:53,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-01 20:51:53,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394208063] [2021-06-01 20:51:53,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:51:53,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:53,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:51:53,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:51:53,111 INFO L87 Difference]: Start difference. First operand 1806 states and 4237 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:55,484 INFO L93 Difference]: Finished difference Result 2353 states and 5326 transitions. [2021-06-01 20:51:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-01 20:51:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:51:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:55,486 INFO L225 Difference]: With dead ends: 2353 [2021-06-01 20:51:55,487 INFO L226 Difference]: Without dead ends: 2311 [2021-06-01 20:51:55,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2437.4ms TimeCoverageRelationStatistics Valid=799, Invalid=5521, Unknown=0, NotChecked=0, Total=6320 [2021-06-01 20:51:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-06-01 20:51:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1865. [2021-06-01 20:51:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.342811158798283) internal successors, (4367), 1864 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4367 transitions. [2021-06-01 20:51:55,504 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4367 transitions. Word has length 33 [2021-06-01 20:51:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:55,504 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 4367 transitions. [2021-06-01 20:51:55,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4367 transitions. [2021-06-01 20:51:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:55,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:55,506 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:55,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:55,713 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:55,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:55,713 INFO L82 PathProgramCache]: Analyzing trace with hash -385362437, now seen corresponding path program 58 times [2021-06-01 20:51:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:55,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051327022] [2021-06-01 20:51:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:56,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:56,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051327022] [2021-06-01 20:51:56,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051327022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:56,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681508203] [2021-06-01 20:51:56,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:56,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:51:56,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:56,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-01 20:51:56,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:51:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:56,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681508203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:56,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:51:56,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-01 20:51:56,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612528892] [2021-06-01 20:51:56,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-01 20:51:56,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:51:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-01 20:51:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-01 20:51:56,552 INFO L87 Difference]: Start difference. First operand 1865 states and 4367 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:51:59,107 INFO L93 Difference]: Finished difference Result 3037 states and 6913 transitions. [2021-06-01 20:51:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-01 20:51:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 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 [2021-06-01 20:51:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:51:59,110 INFO L225 Difference]: With dead ends: 3037 [2021-06-01 20:51:59,110 INFO L226 Difference]: Without dead ends: 2970 [2021-06-01 20:51:59,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2604.5ms TimeCoverageRelationStatistics Valid=826, Invalid=4576, Unknown=0, NotChecked=0, Total=5402 [2021-06-01 20:51:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-06-01 20:51:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1932. [2021-06-01 20:51:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.335059554634904) internal successors, (4509), 1931 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:59,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 4509 transitions. [2021-06-01 20:51:59,132 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 4509 transitions. Word has length 33 [2021-06-01 20:51:59,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:51:59,132 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 4509 transitions. [2021-06-01 20:51:59,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:51:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 4509 transitions. [2021-06-01 20:51:59,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:51:59,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:51:59,134 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:51:59,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-01 20:51:59,334 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:51:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:51:59,335 INFO L82 PathProgramCache]: Analyzing trace with hash 237419395, now seen corresponding path program 59 times [2021-06-01 20:51:59,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:51:59,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002530075] [2021-06-01 20:51:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:51:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:51:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:51:59,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:51:59,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002530075] [2021-06-01 20:51:59,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002530075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:51:59,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252923721] [2021-06-01 20:51:59,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:51:59,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 20:51:59,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:51:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-01 20:51:59,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:00,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252923721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:00,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:00,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-01 20:52:00,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898174683] [2021-06-01 20:52:00,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:52:00,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:00,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:52:00,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:52:00,067 INFO L87 Difference]: Start difference. First operand 1932 states and 4509 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:02,733 INFO L93 Difference]: Finished difference Result 3720 states and 8375 transitions. [2021-06-01 20:52:02,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-01 20:52:02,733 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 [2021-06-01 20:52:02,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:02,736 INFO L225 Difference]: With dead ends: 3720 [2021-06-01 20:52:02,736 INFO L226 Difference]: Without dead ends: 3639 [2021-06-01 20:52:02,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2448.9ms TimeCoverageRelationStatistics Valid=944, Invalid=4908, Unknown=0, NotChecked=0, Total=5852 [2021-06-01 20:52:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-06-01 20:52:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2060. [2021-06-01 20:52:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.329286061194755) internal successors, (4796), 2059 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 4796 transitions. [2021-06-01 20:52:02,759 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 4796 transitions. Word has length 33 [2021-06-01 20:52:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:02,759 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 4796 transitions. [2021-06-01 20:52:02,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 4796 transitions. [2021-06-01 20:52:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-01 20:52:02,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:02,762 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:02,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:02,962 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:02,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:02,962 INFO L82 PathProgramCache]: Analyzing trace with hash 174645243, now seen corresponding path program 60 times [2021-06-01 20:52:02,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:02,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519563655] [2021-06-01 20:52:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:03,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:03,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519563655] [2021-06-01 20:52:03,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519563655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:03,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123799634] [2021-06-01 20:52:03,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:03,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:52:03,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:03,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-01 20:52:03,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:03,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123799634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:03,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:03,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-01 20:52:03,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029840420] [2021-06-01 20:52:03,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:52:03,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:52:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:52:03,760 INFO L87 Difference]: Start difference. First operand 2060 states and 4796 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:06,787 INFO L93 Difference]: Finished difference Result 3836 states and 8664 transitions. [2021-06-01 20:52:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 20:52:06,787 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-01 20:52:06,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:06,791 INFO L225 Difference]: With dead ends: 3836 [2021-06-01 20:52:06,791 INFO L226 Difference]: Without dead ends: 3773 [2021-06-01 20:52:06,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 2891.1ms TimeCoverageRelationStatistics Valid=1036, Invalid=6620, Unknown=0, NotChecked=0, Total=7656 [2021-06-01 20:52:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-01 20:52:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2341. [2021-06-01 20:52:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 2.345726495726496) internal successors, (5489), 2340 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 5489 transitions. [2021-06-01 20:52:06,820 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 5489 transitions. Word has length 33 [2021-06-01 20:52:06,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:06,820 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 5489 transitions. [2021-06-01 20:52:06,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 5489 transitions. [2021-06-01 20:52:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:06,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:06,823 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:07,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-01 20:52:07,023 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:07,024 INFO L82 PathProgramCache]: Analyzing trace with hash 42093407, now seen corresponding path program 61 times [2021-06-01 20:52:07,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:07,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556205237] [2021-06-01 20:52:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:07,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:07,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556205237] [2021-06-01 20:52:07,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556205237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:07,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302880291] [2021-06-01 20:52:07,234 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) [2021-06-01 20:52:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:07,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:07,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302880291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:07,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:07,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:07,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105759461] [2021-06-01 20:52:07,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:07,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:07,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:07,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:07,775 INFO L87 Difference]: Start difference. First operand 2341 states and 5489 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:09,314 INFO L93 Difference]: Finished difference Result 3299 states and 7593 transitions. [2021-06-01 20:52:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-01 20:52:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:09,317 INFO L225 Difference]: With dead ends: 3299 [2021-06-01 20:52:09,317 INFO L226 Difference]: Without dead ends: 3247 [2021-06-01 20:52:09,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1514.0ms TimeCoverageRelationStatistics Valid=669, Invalid=4023, Unknown=0, NotChecked=0, Total=4692 [2021-06-01 20:52:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-01 20:52:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2377. [2021-06-01 20:52:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.3434343434343434) internal successors, (5568), 2376 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 5568 transitions. [2021-06-01 20:52:09,343 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 5568 transitions. Word has length 35 [2021-06-01 20:52:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:09,343 INFO L482 AbstractCegarLoop]: Abstraction has 2377 states and 5568 transitions. [2021-06-01 20:52:09,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 5568 transitions. [2021-06-01 20:52:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:09,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:09,345 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:09,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-01 20:52:09,546 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:09,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1208064305, now seen corresponding path program 62 times [2021-06-01 20:52:09,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:09,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122152322] [2021-06-01 20:52:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:09,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:09,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122152322] [2021-06-01 20:52:09,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122152322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:09,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247686206] [2021-06-01 20:52:09,761 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:09,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:52:09,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:09,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:09,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:10,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247686206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:10,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:10,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:10,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297239712] [2021-06-01 20:52:10,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:10,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:10,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:10,296 INFO L87 Difference]: Start difference. First operand 2377 states and 5568 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:11,800 INFO L93 Difference]: Finished difference Result 3241 states and 7484 transitions. [2021-06-01 20:52:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-01 20:52:11,800 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:11,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:11,803 INFO L225 Difference]: With dead ends: 3241 [2021-06-01 20:52:11,803 INFO L226 Difference]: Without dead ends: 3193 [2021-06-01 20:52:11,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1471.1ms TimeCoverageRelationStatistics Valid=571, Invalid=3589, Unknown=0, NotChecked=0, Total=4160 [2021-06-01 20:52:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-01 20:52:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2387. [2021-06-01 20:52:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.341994970662196) internal successors, (5588), 2386 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 5588 transitions. [2021-06-01 20:52:11,829 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 5588 transitions. Word has length 35 [2021-06-01 20:52:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:11,829 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 5588 transitions. [2021-06-01 20:52:11,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:11,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 5588 transitions. [2021-06-01 20:52:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:11,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:11,832 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:12,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:12,033 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:12,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1268866609, now seen corresponding path program 63 times [2021-06-01 20:52:12,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:12,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295500029] [2021-06-01 20:52:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:12,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:12,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295500029] [2021-06-01 20:52:12,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295500029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:12,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33907186] [2021-06-01 20:52:12,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:12,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:52:12,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:12,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:12,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33907186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:12,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:12,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466916125] [2021-06-01 20:52:12,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:12,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:12,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:12,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:12,797 INFO L87 Difference]: Start difference. First operand 2387 states and 5588 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:14,796 INFO L93 Difference]: Finished difference Result 3451 states and 7906 transitions. [2021-06-01 20:52:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-01 20:52:14,796 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:14,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:14,799 INFO L225 Difference]: With dead ends: 3451 [2021-06-01 20:52:14,799 INFO L226 Difference]: Without dead ends: 3409 [2021-06-01 20:52:14,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2013.8ms TimeCoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2021-06-01 20:52:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-06-01 20:52:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2419. [2021-06-01 20:52:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.339950372208437) internal successors, (5658), 2418 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) [2021-06-01 20:52:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 5658 transitions. [2021-06-01 20:52:14,834 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 5658 transitions. Word has length 35 [2021-06-01 20:52:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:14,834 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 5658 transitions. [2021-06-01 20:52:14,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 5658 transitions. [2021-06-01 20:52:14,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:14,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:14,836 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:15,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable822,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:15,049 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2098249707, now seen corresponding path program 64 times [2021-06-01 20:52:15,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:15,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397496302] [2021-06-01 20:52:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:15,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397496302] [2021-06-01 20:52:15,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397496302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633347247] [2021-06-01 20:52:15,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:15,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:52:15,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:15,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:15,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633347247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:15,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:15,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:15,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915353524] [2021-06-01 20:52:15,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:15,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:15,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:15,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:15,829 INFO L87 Difference]: Start difference. First operand 2419 states and 5658 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:17,543 INFO L93 Difference]: Finished difference Result 3327 states and 7665 transitions. [2021-06-01 20:52:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 20:52:17,544 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:17,547 INFO L225 Difference]: With dead ends: 3327 [2021-06-01 20:52:17,547 INFO L226 Difference]: Without dead ends: 3273 [2021-06-01 20:52:17,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1794.9ms TimeCoverageRelationStatistics Valid=674, Invalid=4156, Unknown=0, NotChecked=0, Total=4830 [2021-06-01 20:52:17,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-06-01 20:52:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2423. [2021-06-01 20:52:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.3393889347646573) internal successors, (5666), 2422 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 5666 transitions. [2021-06-01 20:52:17,571 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 5666 transitions. Word has length 35 [2021-06-01 20:52:17,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:17,571 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 5666 transitions. [2021-06-01 20:52:17,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:17,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 5666 transitions. [2021-06-01 20:52:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:17,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:17,573 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:17,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-01 20:52:17,773 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2135915285, now seen corresponding path program 65 times [2021-06-01 20:52:17,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:17,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908087552] [2021-06-01 20:52:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:17,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:17,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908087552] [2021-06-01 20:52:17,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908087552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:17,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250857542] [2021-06-01 20:52:17,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:17,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:52:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:17,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:18,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250857542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:18,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:18,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:18,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27634202] [2021-06-01 20:52:18,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:18,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:18,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:18,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:18,544 INFO L87 Difference]: Start difference. First operand 2423 states and 5666 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:20,875 INFO L93 Difference]: Finished difference Result 3537 states and 8101 transitions. [2021-06-01 20:52:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-01 20:52:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:20,878 INFO L225 Difference]: With dead ends: 3537 [2021-06-01 20:52:20,878 INFO L226 Difference]: Without dead ends: 3495 [2021-06-01 20:52:20,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2324.6ms TimeCoverageRelationStatistics Valid=1079, Invalid=5563, Unknown=0, NotChecked=0, Total=6642 [2021-06-01 20:52:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-06-01 20:52:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2421. [2021-06-01 20:52:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.3396694214876033) internal successors, (5662), 2420 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 5662 transitions. [2021-06-01 20:52:20,902 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 5662 transitions. Word has length 35 [2021-06-01 20:52:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:20,902 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 5662 transitions. [2021-06-01 20:52:20,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 5662 transitions. [2021-06-01 20:52:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:20,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:20,909 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:21,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-06-01 20:52:21,110 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash -354380241, now seen corresponding path program 66 times [2021-06-01 20:52:21,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:21,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334600817] [2021-06-01 20:52:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:21,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:21,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334600817] [2021-06-01 20:52:21,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334600817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:21,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476705891] [2021-06-01 20:52:21,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:21,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:52:21,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:21,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476705891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:21,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:21,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:21,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151165303] [2021-06-01 20:52:21,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:21,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:21,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:21,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:21,909 INFO L87 Difference]: Start difference. First operand 2421 states and 5662 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:25,057 INFO L93 Difference]: Finished difference Result 3760 states and 8574 transitions. [2021-06-01 20:52:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-01 20:52:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:25,060 INFO L225 Difference]: With dead ends: 3760 [2021-06-01 20:52:25,060 INFO L226 Difference]: Without dead ends: 3718 [2021-06-01 20:52:25,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 2981.9ms TimeCoverageRelationStatistics Valid=1483, Invalid=8219, Unknown=0, NotChecked=0, Total=9702 [2021-06-01 20:52:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-06-01 20:52:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 2453. [2021-06-01 20:52:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.33931484502447) internal successors, (5736), 2452 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 5736 transitions. [2021-06-01 20:52:25,102 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 5736 transitions. Word has length 35 [2021-06-01 20:52:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:25,102 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 5736 transitions. [2021-06-01 20:52:25,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 5736 transitions. [2021-06-01 20:52:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:25,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:25,104 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:25,320 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:25,320 INFO L82 PathProgramCache]: Analyzing trace with hash -643028877, now seen corresponding path program 67 times [2021-06-01 20:52:25,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863925120] [2021-06-01 20:52:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:25,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:25,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863925120] [2021-06-01 20:52:25,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863925120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:25,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343912882] [2021-06-01 20:52:25,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:26,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343912882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:26,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:26,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:26,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257794929] [2021-06-01 20:52:26,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:26,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:26,136 INFO L87 Difference]: Start difference. First operand 2453 states and 5736 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:29,828 INFO L93 Difference]: Finished difference Result 4092 states and 9200 transitions. [2021-06-01 20:52:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-01 20:52:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:29,837 INFO L225 Difference]: With dead ends: 4092 [2021-06-01 20:52:29,837 INFO L226 Difference]: Without dead ends: 4052 [2021-06-01 20:52:29,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4119 ImplicationChecksByTransitivity, 3448.4ms TimeCoverageRelationStatistics Valid=1844, Invalid=10146, Unknown=0, NotChecked=0, Total=11990 [2021-06-01 20:52:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-01 20:52:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 2489. [2021-06-01 20:52:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.3392282958199355) internal successors, (5820), 2488 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5820 transitions. [2021-06-01 20:52:29,864 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5820 transitions. Word has length 35 [2021-06-01 20:52:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:29,864 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 5820 transitions. [2021-06-01 20:52:29,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5820 transitions. [2021-06-01 20:52:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:29,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:29,866 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:30,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:30,067 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:30,067 INFO L82 PathProgramCache]: Analyzing trace with hash 268401591, now seen corresponding path program 68 times [2021-06-01 20:52:30,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:30,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081184583] [2021-06-01 20:52:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:30,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:30,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081184583] [2021-06-01 20:52:30,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081184583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:30,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368478293] [2021-06-01 20:52:30,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:30,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:52:30,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:30,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:30,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:30,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368478293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:30,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:30,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:30,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797502064] [2021-06-01 20:52:30,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:30,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:30,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:30,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:30,833 INFO L87 Difference]: Start difference. First operand 2489 states and 5820 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:34,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:34,647 INFO L93 Difference]: Finished difference Result 4809 states and 10645 transitions. [2021-06-01 20:52:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-01 20:52:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:34,651 INFO L225 Difference]: With dead ends: 4809 [2021-06-01 20:52:34,651 INFO L226 Difference]: Without dead ends: 4769 [2021-06-01 20:52:34,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 3300.1ms TimeCoverageRelationStatistics Valid=1613, Invalid=9099, Unknown=0, NotChecked=0, Total=10712 [2021-06-01 20:52:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-06-01 20:52:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 2561. [2021-06-01 20:52:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.346875) internal successors, (6008), 2560 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 6008 transitions. [2021-06-01 20:52:34,683 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 6008 transitions. Word has length 35 [2021-06-01 20:52:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:34,683 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 6008 transitions. [2021-06-01 20:52:34,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 6008 transitions. [2021-06-01 20:52:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:34,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:34,685 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:34,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:34,886 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash -461964319, now seen corresponding path program 69 times [2021-06-01 20:52:34,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:34,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518011970] [2021-06-01 20:52:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:35,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:35,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518011970] [2021-06-01 20:52:35,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518011970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:35,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890342143] [2021-06-01 20:52:35,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:35,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-01 20:52:35,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:35,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:52:35,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:52:35,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890342143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:35,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:35,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:52:35,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106000888] [2021-06-01 20:52:35,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:52:35,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:52:35,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:52:35,477 INFO L87 Difference]: Start difference. First operand 2561 states and 6008 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:36,949 INFO L93 Difference]: Finished difference Result 3689 states and 8571 transitions. [2021-06-01 20:52:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-01 20:52:36,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 [2021-06-01 20:52:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:36,953 INFO L225 Difference]: With dead ends: 3689 [2021-06-01 20:52:36,953 INFO L226 Difference]: Without dead ends: 3687 [2021-06-01 20:52:36,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1307.6ms TimeCoverageRelationStatistics Valid=607, Invalid=3299, Unknown=0, NotChecked=0, Total=3906 [2021-06-01 20:52:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-06-01 20:52:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2760. [2021-06-01 20:52:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.3599130119608556) internal successors, (6511), 2759 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6511 transitions. [2021-06-01 20:52:36,980 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6511 transitions. Word has length 35 [2021-06-01 20:52:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:36,980 INFO L482 AbstractCegarLoop]: Abstraction has 2760 states and 6511 transitions. [2021-06-01 20:52:36,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6511 transitions. [2021-06-01 20:52:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:36,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:36,983 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:37,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:37,184 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:37,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2016394933, now seen corresponding path program 70 times [2021-06-01 20:52:37,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:37,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978611663] [2021-06-01 20:52:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:37,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:37,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978611663] [2021-06-01 20:52:37,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978611663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:37,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477523873] [2021-06-01 20:52:37,494 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:37,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:52:37,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:38,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477523873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:38,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:38,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:38,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425864938] [2021-06-01 20:52:38,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:38,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:38,132 INFO L87 Difference]: Start difference. First operand 2760 states and 6511 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:41,544 INFO L93 Difference]: Finished difference Result 3976 states and 9161 transitions. [2021-06-01 20:52:41,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-01 20:52:41,545 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:41,548 INFO L225 Difference]: With dead ends: 3976 [2021-06-01 20:52:41,548 INFO L226 Difference]: Without dead ends: 3916 [2021-06-01 20:52:41,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 3269.2ms TimeCoverageRelationStatistics Valid=1313, Invalid=9193, Unknown=0, NotChecked=0, Total=10506 [2021-06-01 20:52:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-06-01 20:52:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 2774. [2021-06-01 20:52:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.3609808871258564) internal successors, (6547), 2773 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 6547 transitions. [2021-06-01 20:52:41,574 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 6547 transitions. Word has length 35 [2021-06-01 20:52:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:41,574 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 6547 transitions. [2021-06-01 20:52:41,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 6547 transitions. [2021-06-01 20:52:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:41,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:41,576 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:41,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-06-01 20:52:41,777 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2077197237, now seen corresponding path program 71 times [2021-06-01 20:52:41,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:41,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883033307] [2021-06-01 20:52:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:41,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:41,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883033307] [2021-06-01 20:52:41,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883033307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:41,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627046373] [2021-06-01 20:52:41,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:42,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:52:42,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:42,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:42,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627046373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:42,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:42,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:52:42,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623600376] [2021-06-01 20:52:42,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:52:42,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:42,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:52:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:52:42,589 INFO L87 Difference]: Start difference. First operand 2774 states and 6547 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:45,823 INFO L93 Difference]: Finished difference Result 4131 states and 9524 transitions. [2021-06-01 20:52:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-01 20:52:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:52:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:45,827 INFO L225 Difference]: With dead ends: 4131 [2021-06-01 20:52:45,827 INFO L226 Difference]: Without dead ends: 4089 [2021-06-01 20:52:45,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 3072.7ms TimeCoverageRelationStatistics Valid=1423, Invalid=7889, Unknown=0, NotChecked=0, Total=9312 [2021-06-01 20:52:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-01 20:52:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 2805. [2021-06-01 20:52:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.361626248216833) internal successors, (6622), 2804 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 6622 transitions. [2021-06-01 20:52:45,858 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 6622 transitions. Word has length 35 [2021-06-01 20:52:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:45,858 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 6622 transitions. [2021-06-01 20:52:45,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 6622 transitions. [2021-06-01 20:52:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:45,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:45,860 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:46,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:46,061 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:46,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1617056775, now seen corresponding path program 72 times [2021-06-01 20:52:46,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:46,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966178023] [2021-06-01 20:52:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:46,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:46,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966178023] [2021-06-01 20:52:46,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966178023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:46,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67408917] [2021-06-01 20:52:46,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:46,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:52:46,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:46,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:52:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67408917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:46,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:46,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:52:46,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253862864] [2021-06-01 20:52:46,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:52:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:52:46,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:52:46,676 INFO L87 Difference]: Start difference. First operand 2805 states and 6622 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) [2021-06-01 20:52:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:48,383 INFO L93 Difference]: Finished difference Result 3500 states and 8075 transitions. [2021-06-01 20:52:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:52:48,384 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 [2021-06-01 20:52:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:48,387 INFO L225 Difference]: With dead ends: 3500 [2021-06-01 20:52:48,387 INFO L226 Difference]: Without dead ends: 3500 [2021-06-01 20:52:48,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1661.5ms TimeCoverageRelationStatistics Valid=849, Invalid=3981, Unknown=0, NotChecked=0, Total=4830 [2021-06-01 20:52:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-01 20:52:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2817. [2021-06-01 20:52:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.3597301136363638) internal successors, (6645), 2816 states have internal predecessors, (6645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 6645 transitions. [2021-06-01 20:52:48,414 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 6645 transitions. Word has length 35 [2021-06-01 20:52:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:48,414 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 6645 transitions. [2021-06-01 20:52:48,414 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) [2021-06-01 20:52:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 6645 transitions. [2021-06-01 20:52:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:48,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:48,416 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:48,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-01 20:52:48,621 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:48,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:48,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1905705411, now seen corresponding path program 73 times [2021-06-01 20:52:48,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:48,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923832302] [2021-06-01 20:52:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:48,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923832302] [2021-06-01 20:52:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923832302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353509965] [2021-06-01 20:52:48,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:52:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:49,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353509965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:49,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:49,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:52:49,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32776677] [2021-06-01 20:52:49,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:52:49,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:52:49,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:52:49,237 INFO L87 Difference]: Start difference. First operand 2817 states and 6645 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) [2021-06-01 20:52:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:51,151 INFO L93 Difference]: Finished difference Result 3661 states and 8422 transitions. [2021-06-01 20:52:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-01 20:52:51,152 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 [2021-06-01 20:52:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:51,155 INFO L225 Difference]: With dead ends: 3661 [2021-06-01 20:52:51,155 INFO L226 Difference]: Without dead ends: 3661 [2021-06-01 20:52:51,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1841.6ms TimeCoverageRelationStatistics Valid=939, Invalid=4463, Unknown=0, NotChecked=0, Total=5402 [2021-06-01 20:52:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-01 20:52:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2821. [2021-06-01 20:52:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 2.3613475177304966) internal successors, (6659), 2820 states have internal predecessors, (6659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 6659 transitions. [2021-06-01 20:52:51,181 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 6659 transitions. Word has length 35 [2021-06-01 20:52:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:51,181 INFO L482 AbstractCegarLoop]: Abstraction has 2821 states and 6659 transitions. [2021-06-01 20:52:51,181 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) [2021-06-01 20:52:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 6659 transitions. [2021-06-01 20:52:51,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:51,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:51,183 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:51,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1014,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:51,384 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:51,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:51,384 INFO L82 PathProgramCache]: Analyzing trace with hash -994274943, now seen corresponding path program 74 times [2021-06-01 20:52:51,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:51,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480775687] [2021-06-01 20:52:51,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:51,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:51,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480775687] [2021-06-01 20:52:51,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480775687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:51,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195109954] [2021-06-01 20:52:51,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:51,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:52:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:51,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:52:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:51,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195109954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:51,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:51,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:52:51,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061737541] [2021-06-01 20:52:51,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:52:51,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:51,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:52:52,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:52:52,000 INFO L87 Difference]: Start difference. First operand 2821 states and 6659 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) [2021-06-01 20:52:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:53,779 INFO L93 Difference]: Finished difference Result 4400 states and 10185 transitions. [2021-06-01 20:52:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-01 20:52:53,779 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 [2021-06-01 20:52:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:53,783 INFO L225 Difference]: With dead ends: 4400 [2021-06-01 20:52:53,783 INFO L226 Difference]: Without dead ends: 4400 [2021-06-01 20:52:53,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1760.9ms TimeCoverageRelationStatistics Valid=887, Invalid=4225, Unknown=0, NotChecked=0, Total=5112 [2021-06-01 20:52:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-06-01 20:52:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2832. [2021-06-01 20:52:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.362062875309078) internal successors, (6687), 2831 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 6687 transitions. [2021-06-01 20:52:53,815 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 6687 transitions. Word has length 35 [2021-06-01 20:52:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:53,815 INFO L482 AbstractCegarLoop]: Abstraction has 2832 states and 6687 transitions. [2021-06-01 20:52:53,815 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) [2021-06-01 20:52:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 6687 transitions. [2021-06-01 20:52:53,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:53,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:53,817 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:54,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-06-01 20:52:54,018 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash -22956363, now seen corresponding path program 75 times [2021-06-01 20:52:54,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:54,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154093469] [2021-06-01 20:52:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:54,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:54,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154093469] [2021-06-01 20:52:54,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154093469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:54,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215130143] [2021-06-01 20:52:54,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:54,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:52:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:54,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215130143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:54,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:54,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-01 20:52:54,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978994417] [2021-06-01 20:52:54,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:52:54,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:52:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:52:54,808 INFO L87 Difference]: Start difference. First operand 2832 states and 6687 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:52:57,673 INFO L93 Difference]: Finished difference Result 4002 states and 9232 transitions. [2021-06-01 20:52:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-01 20:52:57,674 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 [2021-06-01 20:52:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:52:57,677 INFO L225 Difference]: With dead ends: 4002 [2021-06-01 20:52:57,677 INFO L226 Difference]: Without dead ends: 3948 [2021-06-01 20:52:57,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 2725.7ms TimeCoverageRelationStatistics Valid=1083, Invalid=7473, Unknown=0, NotChecked=0, Total=8556 [2021-06-01 20:52:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-01 20:52:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2856. [2021-06-01 20:52:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.360420315236427) internal successors, (6739), 2855 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 6739 transitions. [2021-06-01 20:52:57,703 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 6739 transitions. Word has length 35 [2021-06-01 20:52:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:52:57,703 INFO L482 AbstractCegarLoop]: Abstraction has 2856 states and 6739 transitions. [2021-06-01 20:52:57,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:52:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 6739 transitions. [2021-06-01 20:52:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:52:57,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:52:57,705 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:52:57,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:57,906 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:52:57,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:52:57,906 INFO L82 PathProgramCache]: Analyzing trace with hash -44282443, now seen corresponding path program 76 times [2021-06-01 20:52:57,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:52:57,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594426014] [2021-06-01 20:52:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:52:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:52:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:58,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:52:58,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594426014] [2021-06-01 20:52:58,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594426014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:58,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128173673] [2021-06-01 20:52:58,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:52:58,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:52:58,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:52:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:52:58,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:52:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:52:58,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128173673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:52:58,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:52:58,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-01 20:52:58,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142769815] [2021-06-01 20:52:58,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:52:58,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:52:58,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:52:58,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:52:58,676 INFO L87 Difference]: Start difference. First operand 2856 states and 6739 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:01,210 INFO L93 Difference]: Finished difference Result 3842 states and 8918 transitions. [2021-06-01 20:53:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-01 20:53:01,211 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 [2021-06-01 20:53:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:01,214 INFO L225 Difference]: With dead ends: 3842 [2021-06-01 20:53:01,214 INFO L226 Difference]: Without dead ends: 3770 [2021-06-01 20:53:01,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2508.8ms TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2021-06-01 20:53:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-06-01 20:53:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2860. [2021-06-01 20:53:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.3585169639734174) internal successors, (6743), 2859 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 6743 transitions. [2021-06-01 20:53:01,252 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 6743 transitions. Word has length 35 [2021-06-01 20:53:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:01,252 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 6743 transitions. [2021-06-01 20:53:01,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 6743 transitions. [2021-06-01 20:53:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:01,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:01,255 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:01,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:01,456 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:01,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1833180341, now seen corresponding path program 77 times [2021-06-01 20:53:01,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:01,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134298413] [2021-06-01 20:53:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:01,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:01,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134298413] [2021-06-01 20:53:01,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134298413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:01,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757392789] [2021-06-01 20:53:01,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:01,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 20:53:01,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:53:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:02,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757392789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:02,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:02,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:53:02,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124548597] [2021-06-01 20:53:02,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:53:02,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:02,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:53:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:53:02,002 INFO L87 Difference]: Start difference. First operand 2860 states and 6743 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) [2021-06-01 20:53:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:03,713 INFO L93 Difference]: Finished difference Result 5084 states and 11781 transitions. [2021-06-01 20:53:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 20:53:03,713 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 [2021-06-01 20:53:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:03,718 INFO L225 Difference]: With dead ends: 5084 [2021-06-01 20:53:03,718 INFO L226 Difference]: Without dead ends: 5084 [2021-06-01 20:53:03,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1567.9ms TimeCoverageRelationStatistics Valid=771, Invalid=3651, Unknown=0, NotChecked=0, Total=4422 [2021-06-01 20:53:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2021-06-01 20:53:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 3004. [2021-06-01 20:53:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.3533133533133532) internal successors, (7067), 3003 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 7067 transitions. [2021-06-01 20:53:03,754 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 7067 transitions. Word has length 35 [2021-06-01 20:53:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:03,754 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 7067 transitions. [2021-06-01 20:53:03,754 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) [2021-06-01 20:53:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 7067 transitions. [2021-06-01 20:53:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:03,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:03,756 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:03,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-01 20:53:03,957 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash 846119997, now seen corresponding path program 78 times [2021-06-01 20:53:03,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:03,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081221830] [2021-06-01 20:53:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 20:53:04,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:04,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081221830] [2021-06-01 20:53:04,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081221830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:04,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23984343] [2021-06-01 20:53:04,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:04,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-01 20:53:04,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-01 20:53:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:53:04,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23984343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:04,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:04,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-01 20:53:04,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657710987] [2021-06-01 20:53:04,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-01 20:53:04,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:04,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-01 20:53:04,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-01 20:53:04,302 INFO L87 Difference]: Start difference. First operand 3004 states and 7067 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:05,295 INFO L93 Difference]: Finished difference Result 4189 states and 9617 transitions. [2021-06-01 20:53:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-01 20:53:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 20:53:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:05,299 INFO L225 Difference]: With dead ends: 4189 [2021-06-01 20:53:05,299 INFO L226 Difference]: Without dead ends: 4153 [2021-06-01 20:53:05,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 861.6ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-01 20:53:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-01 20:53:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2873. [2021-06-01 20:53:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2872 states have (on average 2.3467966573816157) internal successors, (6740), 2872 states have internal predecessors, (6740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 6740 transitions. [2021-06-01 20:53:05,328 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 6740 transitions. Word has length 35 [2021-06-01 20:53:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:05,329 INFO L482 AbstractCegarLoop]: Abstraction has 2873 states and 6740 transitions. [2021-06-01 20:53:05,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 6740 transitions. [2021-06-01 20:53:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:05,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:05,331 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:05,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-01 20:53:05,544 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:05,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1809722061, now seen corresponding path program 79 times [2021-06-01 20:53:05,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:05,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036048567] [2021-06-01 20:53:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:05,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:05,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036048567] [2021-06-01 20:53:05,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036048567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:05,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412131914] [2021-06-01 20:53:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:53:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:06,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412131914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:06,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:06,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-01 20:53:06,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360887029] [2021-06-01 20:53:06,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:53:06,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:06,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:53:06,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:53:06,368 INFO L87 Difference]: Start difference. First operand 2873 states and 6740 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:09,842 INFO L93 Difference]: Finished difference Result 4270 states and 9783 transitions. [2021-06-01 20:53:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-01 20:53:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 [2021-06-01 20:53:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:09,847 INFO L225 Difference]: With dead ends: 4270 [2021-06-01 20:53:09,847 INFO L226 Difference]: Without dead ends: 4222 [2021-06-01 20:53:09,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3390.1ms TimeCoverageRelationStatistics Valid=1575, Invalid=8727, Unknown=0, NotChecked=0, Total=10302 [2021-06-01 20:53:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-01 20:53:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 2879. [2021-06-01 20:53:09,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.3467685892981236) internal successors, (6754), 2878 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 6754 transitions. [2021-06-01 20:53:09,884 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 6754 transitions. Word has length 35 [2021-06-01 20:53:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:09,885 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 6754 transitions. [2021-06-01 20:53:09,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 6754 transitions. [2021-06-01 20:53:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:09,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:09,887 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:10,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:10,101 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:10,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1249714381, now seen corresponding path program 80 times [2021-06-01 20:53:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:10,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119582681] [2021-06-01 20:53:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:53:10,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:10,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119582681] [2021-06-01 20:53:10,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119582681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:10,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313055105] [2021-06-01 20:53:10,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:10,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:53:10,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:10,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:53:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:10,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313055105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:10,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:10,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-01 20:53:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661791854] [2021-06-01 20:53:10,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:53:10,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:10,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:53:10,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:53:10,865 INFO L87 Difference]: Start difference. First operand 2879 states and 6754 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:13,672 INFO L93 Difference]: Finished difference Result 5077 states and 11546 transitions. [2021-06-01 20:53:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 20:53:13,673 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 [2021-06-01 20:53:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:13,678 INFO L225 Difference]: With dead ends: 5077 [2021-06-01 20:53:13,678 INFO L226 Difference]: Without dead ends: 4993 [2021-06-01 20:53:13,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 2754.1ms TimeCoverageRelationStatistics Valid=1052, Invalid=6258, Unknown=0, NotChecked=0, Total=7310 [2021-06-01 20:53:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-06-01 20:53:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 3061. [2021-06-01 20:53:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.3532679738562092) internal successors, (7201), 3060 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 7201 transitions. [2021-06-01 20:53:13,724 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 7201 transitions. Word has length 35 [2021-06-01 20:53:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:13,724 INFO L482 AbstractCegarLoop]: Abstraction has 3061 states and 7201 transitions. [2021-06-01 20:53:13,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:13,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 7201 transitions. [2021-06-01 20:53:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:13,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:13,727 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:13,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-06-01 20:53:13,927 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash -366524553, now seen corresponding path program 81 times [2021-06-01 20:53:13,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:13,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888115108] [2021-06-01 20:53:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:14,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:14,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888115108] [2021-06-01 20:53:14,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888115108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:14,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475094443] [2021-06-01 20:53:14,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:14,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-01 20:53:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:53:14,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:14,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475094443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:14,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:14,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-01 20:53:14,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759637068] [2021-06-01 20:53:14,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:53:14,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:14,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:53:14,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:53:14,714 INFO L87 Difference]: Start difference. First operand 3061 states and 7201 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:18,097 INFO L93 Difference]: Finished difference Result 5205 states and 11840 transitions. [2021-06-01 20:53:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-01 20:53:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 [2021-06-01 20:53:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:18,102 INFO L225 Difference]: With dead ends: 5205 [2021-06-01 20:53:18,102 INFO L226 Difference]: Without dead ends: 5157 [2021-06-01 20:53:18,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 3158.4ms TimeCoverageRelationStatistics Valid=1325, Invalid=7417, Unknown=0, NotChecked=0, Total=8742 [2021-06-01 20:53:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2021-06-01 20:53:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3104. [2021-06-01 20:53:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 2.350306155333548) internal successors, (7293), 3103 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 7293 transitions. [2021-06-01 20:53:18,146 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 7293 transitions. Word has length 35 [2021-06-01 20:53:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:18,146 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 7293 transitions. [2021-06-01 20:53:18,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 7293 transitions. [2021-06-01 20:53:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:18,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:18,149 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:18,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-01 20:53:18,365 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:18,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1433047865, now seen corresponding path program 82 times [2021-06-01 20:53:18,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:18,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76239019] [2021-06-01 20:53:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:18,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:18,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76239019] [2021-06-01 20:53:18,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76239019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:18,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643528280] [2021-06-01 20:53:18,652 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 [2021-06-01 20:53:18,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:53:18,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:53:18,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:19,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643528280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:19,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:19,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:53:19,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214691474] [2021-06-01 20:53:19,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:53:19,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:53:19,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:53:19,262 INFO L87 Difference]: Start difference. First operand 3104 states and 7293 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:23,840 INFO L93 Difference]: Finished difference Result 4625 states and 10559 transitions. [2021-06-01 20:53:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-01 20:53:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:53:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:23,844 INFO L225 Difference]: With dead ends: 4625 [2021-06-01 20:53:23,844 INFO L226 Difference]: Without dead ends: 4559 [2021-06-01 20:53:23,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5744 ImplicationChecksByTransitivity, 4306.1ms TimeCoverageRelationStatistics Valid=2007, Invalid=13493, Unknown=0, NotChecked=0, Total=15500 [2021-06-01 20:53:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2021-06-01 20:53:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 3124. [2021-06-01 20:53:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.3519052193403778) internal successors, (7345), 3123 states have internal predecessors, (7345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 7345 transitions. [2021-06-01 20:53:23,880 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 7345 transitions. Word has length 35 [2021-06-01 20:53:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:23,880 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 7345 transitions. [2021-06-01 20:53:23,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 7345 transitions. [2021-06-01 20:53:23,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:23,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:23,883 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:24,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:24,083 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:24,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1902771911, now seen corresponding path program 83 times [2021-06-01 20:53:24,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:24,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390821210] [2021-06-01 20:53:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:24,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:24,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390821210] [2021-06-01 20:53:24,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390821210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402926732] [2021-06-01 20:53:24,364 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 [2021-06-01 20:53:24,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:53:24,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:24,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-01 20:53:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:24,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402926732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:24,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:24,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:53:24,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507314064] [2021-06-01 20:53:24,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:53:24,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:24,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:53:24,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:53:24,972 INFO L87 Difference]: Start difference. First operand 3124 states and 7345 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:28,707 INFO L93 Difference]: Finished difference Result 4367 states and 10055 transitions. [2021-06-01 20:53:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-01 20:53:28,707 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:53:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:28,711 INFO L225 Difference]: With dead ends: 4367 [2021-06-01 20:53:28,711 INFO L226 Difference]: Without dead ends: 4331 [2021-06-01 20:53:28,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3566 ImplicationChecksByTransitivity, 3655.2ms TimeCoverageRelationStatistics Valid=1380, Invalid=9126, Unknown=0, NotChecked=0, Total=10506 [2021-06-01 20:53:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-06-01 20:53:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3128. [2021-06-01 20:53:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.351455068755996) internal successors, (7353), 3127 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 7353 transitions. [2021-06-01 20:53:28,744 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 7353 transitions. Word has length 35 [2021-06-01 20:53:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:28,744 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 7353 transitions. [2021-06-01 20:53:28,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 7353 transitions. [2021-06-01 20:53:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:28,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:28,747 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:28,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:28,948 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1493850169, now seen corresponding path program 84 times [2021-06-01 20:53:28,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:28,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902741168] [2021-06-01 20:53:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:29,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:29,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902741168] [2021-06-01 20:53:29,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902741168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:29,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758247300] [2021-06-01 20:53:29,237 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:29,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:53:29,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:53:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:29,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758247300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:29,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:29,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:53:29,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293791454] [2021-06-01 20:53:29,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:53:29,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:53:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:53:29,853 INFO L87 Difference]: Start difference. First operand 3128 states and 7353 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:34,999 INFO L93 Difference]: Finished difference Result 4790 states and 10902 transitions. [2021-06-01 20:53:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-01 20:53:35,000 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:53:35,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:35,004 INFO L225 Difference]: With dead ends: 4790 [2021-06-01 20:53:35,004 INFO L226 Difference]: Without dead ends: 4748 [2021-06-01 20:53:35,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 4920.2ms TimeCoverageRelationStatistics Valid=2422, Invalid=14090, Unknown=0, NotChecked=0, Total=16512 [2021-06-01 20:53:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-06-01 20:53:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3140. [2021-06-01 20:53:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 2.352341510035043) internal successors, (7384), 3139 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 7384 transitions. [2021-06-01 20:53:35,039 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 7384 transitions. Word has length 35 [2021-06-01 20:53:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:35,039 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 7384 transitions. [2021-06-01 20:53:35,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 7384 transitions. [2021-06-01 20:53:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:35,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:35,042 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:35,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1217 [2021-06-01 20:53:35,242 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:35,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2094563453, now seen corresponding path program 85 times [2021-06-01 20:53:35,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:35,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497594727] [2021-06-01 20:53:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:53:35,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:35,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497594727] [2021-06-01 20:53:35,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497594727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:35,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667544006] [2021-06-01 20:53:35,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:35,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:53:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:35,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667544006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:35,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:35,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:53:35,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767447419] [2021-06-01 20:53:35,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:53:35,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:53:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:53:35,869 INFO L87 Difference]: Start difference. First operand 3140 states and 7384 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) [2021-06-01 20:53:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:37,855 INFO L93 Difference]: Finished difference Result 3894 states and 8946 transitions. [2021-06-01 20:53:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-01 20:53:37,855 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 [2021-06-01 20:53:37,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:37,858 INFO L225 Difference]: With dead ends: 3894 [2021-06-01 20:53:37,859 INFO L226 Difference]: Without dead ends: 3894 [2021-06-01 20:53:37,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1841.2ms TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2021-06-01 20:53:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-06-01 20:53:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3148. [2021-06-01 20:53:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 2.3511280584683827) internal successors, (7399), 3147 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 7399 transitions. [2021-06-01 20:53:37,889 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 7399 transitions. Word has length 35 [2021-06-01 20:53:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:37,889 INFO L482 AbstractCegarLoop]: Abstraction has 3148 states and 7399 transitions. [2021-06-01 20:53:37,890 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) [2021-06-01 20:53:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 7399 transitions. [2021-06-01 20:53:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:37,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:37,892 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:38,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-06-01 20:53:38,093 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1577622011, now seen corresponding path program 86 times [2021-06-01 20:53:38,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:38,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978627090] [2021-06-01 20:53:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:38,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:38,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978627090] [2021-06-01 20:53:38,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978627090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:38,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217295064] [2021-06-01 20:53:38,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:38,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:53:38,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:53:38,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:38,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217295064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:38,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:38,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-01 20:53:38,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721153121] [2021-06-01 20:53:38,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-01 20:53:38,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:38,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-01 20:53:38,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-01 20:53:38,667 INFO L87 Difference]: Start difference. First operand 3148 states and 7399 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) [2021-06-01 20:53:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:40,555 INFO L93 Difference]: Finished difference Result 4657 states and 10723 transitions. [2021-06-01 20:53:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-01 20:53:40,555 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 [2021-06-01 20:53:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:40,559 INFO L225 Difference]: With dead ends: 4657 [2021-06-01 20:53:40,560 INFO L226 Difference]: Without dead ends: 4654 [2021-06-01 20:53:40,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1740.4ms TimeCoverageRelationStatistics Valid=896, Invalid=4216, Unknown=0, NotChecked=0, Total=5112 [2021-06-01 20:53:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-01 20:53:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 3187. [2021-06-01 20:53:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 2.349968612680477) internal successors, (7487), 3186 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 7487 transitions. [2021-06-01 20:53:40,594 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 7487 transitions. Word has length 35 [2021-06-01 20:53:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:40,594 INFO L482 AbstractCegarLoop]: Abstraction has 3187 states and 7487 transitions. [2021-06-01 20:53:40,594 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) [2021-06-01 20:53:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 7487 transitions. [2021-06-01 20:53:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:40,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:40,597 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:40,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-01 20:53:40,809 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:40,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2070250695, now seen corresponding path program 87 times [2021-06-01 20:53:40,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:40,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118160771] [2021-06-01 20:53:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:40,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118160771] [2021-06-01 20:53:40,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118160771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156939289] [2021-06-01 20:53:40,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:40,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-01 20:53:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:40,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 20:53:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:41,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156939289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:41,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:41,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:53:41,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914253411] [2021-06-01 20:53:41,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:53:41,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:53:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:53:41,419 INFO L87 Difference]: Start difference. First operand 3187 states and 7487 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) [2021-06-01 20:53:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:42,980 INFO L93 Difference]: Finished difference Result 5710 states and 13179 transitions. [2021-06-01 20:53:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-01 20:53:42,980 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 [2021-06-01 20:53:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:42,986 INFO L225 Difference]: With dead ends: 5710 [2021-06-01 20:53:42,986 INFO L226 Difference]: Without dead ends: 5686 [2021-06-01 20:53:42,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1441.7ms TimeCoverageRelationStatistics Valid=857, Invalid=3835, Unknown=0, NotChecked=0, Total=4692 [2021-06-01 20:53:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-01 20:53:43,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4202. [2021-06-01 20:53:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4202 states, 4201 states have (on average 2.379909545346346) internal successors, (9998), 4201 states have internal predecessors, (9998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4202 states to 4202 states and 9998 transitions. [2021-06-01 20:53:43,032 INFO L78 Accepts]: Start accepts. Automaton has 4202 states and 9998 transitions. Word has length 35 [2021-06-01 20:53:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:43,032 INFO L482 AbstractCegarLoop]: Abstraction has 4202 states and 9998 transitions. [2021-06-01 20:53:43,032 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) [2021-06-01 20:53:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4202 states and 9998 transitions. [2021-06-01 20:53:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:43,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:43,035 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:43,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-01 20:53:43,235 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash 739863609, now seen corresponding path program 88 times [2021-06-01 20:53:43,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:43,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236363641] [2021-06-01 20:53:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:43,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:43,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236363641] [2021-06-01 20:53:43,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236363641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:43,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662984667] [2021-06-01 20:53:43,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:43,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:53:43,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:53:43,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:44,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662984667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:44,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:44,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-01 20:53:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105098080] [2021-06-01 20:53:44,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:53:44,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:44,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:53:44,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:53:44,064 INFO L87 Difference]: Start difference. First operand 4202 states and 9998 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:47,972 INFO L93 Difference]: Finished difference Result 7108 states and 16347 transitions. [2021-06-01 20:53:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-01 20:53:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 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 [2021-06-01 20:53:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:47,979 INFO L225 Difference]: With dead ends: 7108 [2021-06-01 20:53:47,979 INFO L226 Difference]: Without dead ends: 7017 [2021-06-01 20:53:47,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4316 ImplicationChecksByTransitivity, 3470.9ms TimeCoverageRelationStatistics Valid=1552, Invalid=10658, Unknown=0, NotChecked=0, Total=12210 [2021-06-01 20:53:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-06-01 20:53:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 4409. [2021-06-01 20:53:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 2.3940562613430125) internal successors, (10553), 4408 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 10553 transitions. [2021-06-01 20:53:48,041 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 10553 transitions. Word has length 35 [2021-06-01 20:53:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:48,041 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 10553 transitions. [2021-06-01 20:53:48,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 10553 transitions. [2021-06-01 20:53:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:48,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:48,046 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:48,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:48,257 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:48,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:48,257 INFO L82 PathProgramCache]: Analyzing trace with hash -179807687, now seen corresponding path program 89 times [2021-06-01 20:53:48,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:48,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586750040] [2021-06-01 20:53:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:48,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586750040] [2021-06-01 20:53:48,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586750040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782725101] [2021-06-01 20:53:48,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:48,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 20:53:48,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:48,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:53:48,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:48,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782725101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:48,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:48,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-06-01 20:53:48,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321006175] [2021-06-01 20:53:48,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:53:48,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:48,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:53:48,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:53:48,840 INFO L87 Difference]: Start difference. First operand 4409 states and 10553 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:53,075 INFO L93 Difference]: Finished difference Result 6487 states and 15070 transitions. [2021-06-01 20:53:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-01 20:53:53,076 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 20:53:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:53,083 INFO L225 Difference]: With dead ends: 6487 [2021-06-01 20:53:53,083 INFO L226 Difference]: Without dead ends: 6433 [2021-06-01 20:53:53,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 3645.5ms TimeCoverageRelationStatistics Valid=1209, Invalid=10347, Unknown=0, NotChecked=0, Total=11556 [2021-06-01 20:53:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-06-01 20:53:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 4475. [2021-06-01 20:53:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 2.388913723737148) internal successors, (10688), 4474 states have internal predecessors, (10688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 10688 transitions. [2021-06-01 20:53:53,142 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 10688 transitions. Word has length 35 [2021-06-01 20:53:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:53,142 INFO L482 AbstractCegarLoop]: Abstraction has 4475 states and 10688 transitions. [2021-06-01 20:53:53,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 10688 transitions. [2021-06-01 20:53:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:53,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:53,146 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:53,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:53,348 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:53,349 INFO L82 PathProgramCache]: Analyzing trace with hash -724083655, now seen corresponding path program 90 times [2021-06-01 20:53:53,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:53,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674083360] [2021-06-01 20:53:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 20:53:53,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:53,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674083360] [2021-06-01 20:53:53,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674083360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:53,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210892269] [2021-06-01 20:53:53,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:53,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-01 20:53:53,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:53,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:53:53,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:53,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210892269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:53,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:53,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:53:53,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136186945] [2021-06-01 20:53:53,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:53:53,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:53,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:53:53,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:53:53,890 INFO L87 Difference]: Start difference. First operand 4475 states and 10688 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:55,244 INFO L93 Difference]: Finished difference Result 6393 states and 14863 transitions. [2021-06-01 20:53:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 20:53:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 20:53:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:55,251 INFO L225 Difference]: With dead ends: 6393 [2021-06-01 20:53:55,251 INFO L226 Difference]: Without dead ends: 6357 [2021-06-01 20:53:55,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1271.9ms TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2021-06-01 20:53:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2021-06-01 20:53:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 4465. [2021-06-01 20:53:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4464 states have (on average 2.3875448028673834) internal successors, (10658), 4464 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 10658 transitions. [2021-06-01 20:53:55,309 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 10658 transitions. Word has length 35 [2021-06-01 20:53:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:55,309 INFO L482 AbstractCegarLoop]: Abstraction has 4465 states and 10658 transitions. [2021-06-01 20:53:55,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 10658 transitions. [2021-06-01 20:53:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:55,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:55,340 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:55,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-01 20:53:55,540 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash 756997177, now seen corresponding path program 91 times [2021-06-01 20:53:55,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:55,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116732321] [2021-06-01 20:53:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:55,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:55,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116732321] [2021-06-01 20:53:55,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116732321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:55,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199609044] [2021-06-01 20:53:55,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-01 20:53:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:56,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199609044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:56,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:56,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-01 20:53:56,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598340844] [2021-06-01 20:53:56,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-01 20:53:56,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-01 20:53:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-01 20:53:56,120 INFO L87 Difference]: Start difference. First operand 4465 states and 10658 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:57,375 INFO L93 Difference]: Finished difference Result 5425 states and 12731 transitions. [2021-06-01 20:53:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-01 20:53:57,375 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 [2021-06-01 20:53:57,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:57,381 INFO L225 Difference]: With dead ends: 5425 [2021-06-01 20:53:57,381 INFO L226 Difference]: Without dead ends: 5407 [2021-06-01 20:53:57,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1242.0ms TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2021-06-01 20:53:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-06-01 20:53:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 4211. [2021-06-01 20:53:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 4210 states have (on average 2.3767220902612824) internal successors, (10006), 4210 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 10006 transitions. [2021-06-01 20:53:57,436 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 10006 transitions. Word has length 35 [2021-06-01 20:53:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:57,436 INFO L482 AbstractCegarLoop]: Abstraction has 4211 states and 10006 transitions. [2021-06-01 20:53:57,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 10006 transitions. [2021-06-01 20:53:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:57,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:57,439 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:57,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:57,640 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:57,640 INFO L82 PathProgramCache]: Analyzing trace with hash 938061735, now seen corresponding path program 92 times [2021-06-01 20:53:57,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:57,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729637579] [2021-06-01 20:53:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:57,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:57,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729637579] [2021-06-01 20:53:57,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729637579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:57,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037805121] [2021-06-01 20:53:57,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:57,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:53:57,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:53:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:53:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:58,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037805121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:58,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:53:58,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-01 20:53:58,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246547325] [2021-06-01 20:53:58,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-01 20:53:58,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:53:58,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-01 20:53:58,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-01 20:53:58,190 INFO L87 Difference]: Start difference. First operand 4211 states and 10006 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) [2021-06-01 20:53:59,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:53:59,093 INFO L93 Difference]: Finished difference Result 4658 states and 10935 transitions. [2021-06-01 20:53:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-01 20:53:59,093 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 [2021-06-01 20:53:59,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:53:59,097 INFO L225 Difference]: With dead ends: 4658 [2021-06-01 20:53:59,097 INFO L226 Difference]: Without dead ends: 4654 [2021-06-01 20:53:59,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 962.1ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-06-01 20:53:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-01 20:53:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4228. [2021-06-01 20:53:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.3763898746155667) internal successors, (10045), 4227 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:53:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 10045 transitions. [2021-06-01 20:53:59,137 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 10045 transitions. Word has length 35 [2021-06-01 20:53:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:53:59,137 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 10045 transitions. [2021-06-01 20:53:59,137 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) [2021-06-01 20:53:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 10045 transitions. [2021-06-01 20:53:59,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:53:59,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:53:59,141 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:53:59,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-01 20:53:59,342 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:53:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:53:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash -817736003, now seen corresponding path program 93 times [2021-06-01 20:53:59,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:53:59,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530157984] [2021-06-01 20:53:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:53:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:53:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:53:59,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:53:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530157984] [2021-06-01 20:53:59,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530157984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:53:59,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181923573] [2021-06-01 20:53:59,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:53:59,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:53:59,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:53:59,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:53:59,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:00,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181923573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:00,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:00,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:54:00,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351380686] [2021-06-01 20:54:00,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:54:00,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:00,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:54:00,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:54:00,252 INFO L87 Difference]: Start difference. First operand 4228 states and 10045 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:05,939 INFO L93 Difference]: Finished difference Result 7630 states and 17556 transitions. [2021-06-01 20:54:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-01 20:54:05,939 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:54:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:05,947 INFO L225 Difference]: With dead ends: 7630 [2021-06-01 20:54:05,947 INFO L226 Difference]: Without dead ends: 7551 [2021-06-01 20:54:05,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7268 ImplicationChecksByTransitivity, 5076.1ms TimeCoverageRelationStatistics Valid=2403, Invalid=16779, Unknown=0, NotChecked=0, Total=19182 [2021-06-01 20:54:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-01 20:54:05,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 4786. [2021-06-01 20:54:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.400208986415883) internal successors, (11485), 4785 states have internal predecessors, (11485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 11485 transitions. [2021-06-01 20:54:06,003 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 11485 transitions. Word has length 35 [2021-06-01 20:54:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:06,003 INFO L482 AbstractCegarLoop]: Abstraction has 4786 states and 11485 transitions. [2021-06-01 20:54:06,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 11485 transitions. [2021-06-01 20:54:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:54:06,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:06,007 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:06,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:06,207 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:06,208 INFO L82 PathProgramCache]: Analyzing trace with hash -756933699, now seen corresponding path program 94 times [2021-06-01 20:54:06,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:06,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491341210] [2021-06-01 20:54:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:06,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:06,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491341210] [2021-06-01 20:54:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491341210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:06,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478369030] [2021-06-01 20:54:06,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:06,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:54:06,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:06,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:54:06,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:07,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478369030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:07,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:07,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-01 20:54:07,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615499547] [2021-06-01 20:54:07,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:54:07,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:54:07,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:54:07,110 INFO L87 Difference]: Start difference. First operand 4786 states and 11485 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:12,017 INFO L93 Difference]: Finished difference Result 7197 states and 16708 transitions. [2021-06-01 20:54:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-01 20:54:12,018 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 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 [2021-06-01 20:54:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:12,025 INFO L225 Difference]: With dead ends: 7197 [2021-06-01 20:54:12,025 INFO L226 Difference]: Without dead ends: 7141 [2021-06-01 20:54:12,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 4532.7ms TimeCoverageRelationStatistics Valid=1899, Invalid=12143, Unknown=0, NotChecked=0, Total=14042 [2021-06-01 20:54:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2021-06-01 20:54:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 4905. [2021-06-01 20:54:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 2.4074225122349104) internal successors, (11806), 4904 states have internal predecessors, (11806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 11806 transitions. [2021-06-01 20:54:12,093 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 11806 transitions. Word has length 35 [2021-06-01 20:54:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:12,093 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 11806 transitions. [2021-06-01 20:54:12,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 11806 transitions. [2021-06-01 20:54:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:54:12,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:12,098 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:12,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:12,313 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:12,314 INFO L82 PathProgramCache]: Analyzing trace with hash -156220415, now seen corresponding path program 95 times [2021-06-01 20:54:12,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:12,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725208143] [2021-06-01 20:54:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:54:12,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:12,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725208143] [2021-06-01 20:54:12,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725208143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:12,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805006371] [2021-06-01 20:54:12,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:12,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 20:54:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:12,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-01 20:54:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:13,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805006371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:13,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:13,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-01 20:54:13,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245478842] [2021-06-01 20:54:13,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-01 20:54:13,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-01 20:54:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-01 20:54:13,105 INFO L87 Difference]: Start difference. First operand 4905 states and 11806 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) [2021-06-01 20:54:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:15,434 INFO L93 Difference]: Finished difference Result 6702 states and 15725 transitions. [2021-06-01 20:54:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-01 20:54:15,435 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 [2021-06-01 20:54:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:15,441 INFO L225 Difference]: With dead ends: 6702 [2021-06-01 20:54:15,442 INFO L226 Difference]: Without dead ends: 6678 [2021-06-01 20:54:15,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2317.8ms TimeCoverageRelationStatistics Valid=1165, Invalid=4997, Unknown=0, NotChecked=0, Total=6162 [2021-06-01 20:54:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-06-01 20:54:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 3663. [2021-06-01 20:54:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.367012561441835) internal successors, (8668), 3662 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 8668 transitions. [2021-06-01 20:54:15,491 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 8668 transitions. Word has length 35 [2021-06-01 20:54:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:15,491 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 8668 transitions. [2021-06-01 20:54:15,491 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) [2021-06-01 20:54:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 8668 transitions. [2021-06-01 20:54:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:54:15,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:15,495 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:15,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:15,711 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:15,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1416553917, now seen corresponding path program 96 times [2021-06-01 20:54:15,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:15,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917693335] [2021-06-01 20:54:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 20:54:16,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:16,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917693335] [2021-06-01 20:54:16,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917693335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:16,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957222718] [2021-06-01 20:54:16,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 20:54:16,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:54:16,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:16,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:54:16,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:16,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957222718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:16,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:16,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-01 20:54:16,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735229806] [2021-06-01 20:54:16,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 20:54:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:16,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 20:54:16,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-01 20:54:16,789 INFO L87 Difference]: Start difference. First operand 3663 states and 8668 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:20,046 INFO L93 Difference]: Finished difference Result 5512 states and 12685 transitions. [2021-06-01 20:54:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 20:54:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-01 20:54:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:20,052 INFO L225 Difference]: With dead ends: 5512 [2021-06-01 20:54:20,052 INFO L226 Difference]: Without dead ends: 5461 [2021-06-01 20:54:20,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 3327.0ms TimeCoverageRelationStatistics Valid=1101, Invalid=7089, Unknown=0, NotChecked=0, Total=8190 [2021-06-01 20:54:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-01 20:54:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3678. [2021-06-01 20:54:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.361435953222736) internal successors, (8683), 3677 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 8683 transitions. [2021-06-01 20:54:20,094 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 8683 transitions. Word has length 35 [2021-06-01 20:54:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:20,094 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 8683 transitions. [2021-06-01 20:54:20,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 8683 transitions. [2021-06-01 20:54:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-01 20:54:20,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:20,097 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:20,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-06-01 20:54:20,297 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash -756433177, now seen corresponding path program 97 times [2021-06-01 20:54:20,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:20,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864226525] [2021-06-01 20:54:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:20,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:20,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864226525] [2021-06-01 20:54:20,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864226525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:20,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131372360] [2021-06-01 20:54:20,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-01 20:54:20,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:20,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131372360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:20,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:20,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-01 20:54:20,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879510403] [2021-06-01 20:54:20,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-01 20:54:20,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:20,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-01 20:54:20,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-01 20:54:20,906 INFO L87 Difference]: Start difference. First operand 3678 states and 8683 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) [2021-06-01 20:54:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:22,399 INFO L93 Difference]: Finished difference Result 4687 states and 10833 transitions. [2021-06-01 20:54:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-01 20:54:22,399 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 [2021-06-01 20:54:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:22,404 INFO L225 Difference]: With dead ends: 4687 [2021-06-01 20:54:22,404 INFO L226 Difference]: Without dead ends: 4675 [2021-06-01 20:54:22,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1343.9ms TimeCoverageRelationStatistics Valid=697, Invalid=3335, Unknown=0, NotChecked=0, Total=4032 [2021-06-01 20:54:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2021-06-01 20:54:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 3716. [2021-06-01 20:54:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 2.364199192462988) internal successors, (8783), 3715 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 8783 transitions. [2021-06-01 20:54:22,452 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 8783 transitions. Word has length 35 [2021-06-01 20:54:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:22,452 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 8783 transitions. [2021-06-01 20:54:22,452 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) [2021-06-01 20:54:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 8783 transitions. [2021-06-01 20:54:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:22,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:22,456 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:22,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-06-01 20:54:22,656 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:22,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:22,657 INFO L82 PathProgramCache]: Analyzing trace with hash -869656803, now seen corresponding path program 98 times [2021-06-01 20:54:22,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:22,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677257755] [2021-06-01 20:54:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:22,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:22,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677257755] [2021-06-01 20:54:22,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677257755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:22,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526478646] [2021-06-01 20:54:22,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:22,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:54:22,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:22,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-01 20:54:22,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:23,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526478646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:23,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:23,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-01 20:54:23,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720163024] [2021-06-01 20:54:23,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-01 20:54:23,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:23,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-01 20:54:23,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-01 20:54:23,030 INFO L87 Difference]: Start difference. First operand 3716 states and 8783 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) [2021-06-01 20:54:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:24,382 INFO L93 Difference]: Finished difference Result 5434 states and 12387 transitions. [2021-06-01 20:54:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-01 20:54:24,382 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 37 [2021-06-01 20:54:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:24,387 INFO L225 Difference]: With dead ends: 5434 [2021-06-01 20:54:24,387 INFO L226 Difference]: Without dead ends: 5434 [2021-06-01 20:54:24,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 1210.5ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-01 20:54:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-06-01 20:54:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 4658. [2021-06-01 20:54:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.3474339703671894) internal successors, (10932), 4657 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 10932 transitions. [2021-06-01 20:54:24,436 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 10932 transitions. Word has length 37 [2021-06-01 20:54:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:24,436 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 10932 transitions. [2021-06-01 20:54:24,436 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) [2021-06-01 20:54:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 10932 transitions. [2021-06-01 20:54:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:24,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:24,440 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:24,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1473,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:24,641 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:24,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1373714529, now seen corresponding path program 99 times [2021-06-01 20:54:24,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:24,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542431115] [2021-06-01 20:54:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:24,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:24,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542431115] [2021-06-01 20:54:24,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542431115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:24,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83677477] [2021-06-01 20:54:24,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:24,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-01 20:54:24,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:24,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-01 20:54:24,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:24,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83677477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:24,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:24,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-06-01 20:54:24,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664900207] [2021-06-01 20:54:24,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-01 20:54:24,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:24,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-01 20:54:24,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-01 20:54:24,972 INFO L87 Difference]: Start difference. First operand 4658 states and 10932 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) [2021-06-01 20:54:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:27,126 INFO L93 Difference]: Finished difference Result 5175 states and 11919 transitions. [2021-06-01 20:54:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-01 20:54:27,126 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 [2021-06-01 20:54:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:27,131 INFO L225 Difference]: With dead ends: 5175 [2021-06-01 20:54:27,131 INFO L226 Difference]: Without dead ends: 5171 [2021-06-01 20:54:27,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 1998.8ms TimeCoverageRelationStatistics Valid=3112, Invalid=10228, Unknown=0, NotChecked=0, Total=13340 [2021-06-01 20:54:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-06-01 20:54:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 4602. [2021-06-01 20:54:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 2.344925016300804) internal successors, (10789), 4601 states have internal predecessors, (10789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 10789 transitions. [2021-06-01 20:54:27,183 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 10789 transitions. Word has length 37 [2021-06-01 20:54:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:27,183 INFO L482 AbstractCegarLoop]: Abstraction has 4602 states and 10789 transitions. [2021-06-01 20:54:27,183 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) [2021-06-01 20:54:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 10789 transitions. [2021-06-01 20:54:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:27,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:27,188 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:27,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:27,389 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1156107053, now seen corresponding path program 100 times [2021-06-01 20:54:27,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:27,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101912384] [2021-06-01 20:54:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:27,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:27,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101912384] [2021-06-01 20:54:27,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101912384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:27,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591973630] [2021-06-01 20:54:27,815 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 [2021-06-01 20:54:27,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:54:27,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:27,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-01 20:54:27,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:28,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591973630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:28,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:28,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-06-01 20:54:28,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14314159] [2021-06-01 20:54:28,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:54:28,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:54:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:54:28,599 INFO L87 Difference]: Start difference. First operand 4602 states and 10789 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:30,072 INFO L93 Difference]: Finished difference Result 5204 states and 12036 transitions. [2021-06-01 20:54:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-01 20:54:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:54:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:30,078 INFO L225 Difference]: With dead ends: 5204 [2021-06-01 20:54:30,078 INFO L226 Difference]: Without dead ends: 5150 [2021-06-01 20:54:30,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1886.5ms TimeCoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2021-06-01 20:54:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-06-01 20:54:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4618. [2021-06-01 20:54:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 2.342863331167425) internal successors, (10817), 4617 states have internal predecessors, (10817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 10817 transitions. [2021-06-01 20:54:30,132 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 10817 transitions. Word has length 37 [2021-06-01 20:54:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:30,132 INFO L482 AbstractCegarLoop]: Abstraction has 4618 states and 10817 transitions. [2021-06-01 20:54:30,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 10817 transitions. [2021-06-01 20:54:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:30,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:30,137 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:30,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:30,338 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:30,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1012654923, now seen corresponding path program 101 times [2021-06-01 20:54:30,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:30,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43564972] [2021-06-01 20:54:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:30,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:30,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43564972] [2021-06-01 20:54:30,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43564972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:30,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254594248] [2021-06-01 20:54:30,569 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 [2021-06-01 20:54:30,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:54:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:30,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-01 20:54:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:31,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254594248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:31,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:31,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-06-01 20:54:31,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945478098] [2021-06-01 20:54:31,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-01 20:54:31,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:31,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-01 20:54:31,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-06-01 20:54:31,281 INFO L87 Difference]: Start difference. First operand 4618 states and 10817 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-06-01 20:54:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:34,169 INFO L93 Difference]: Finished difference Result 5242 states and 12110 transitions. [2021-06-01 20:54:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 20:54:34,170 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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 37 [2021-06-01 20:54:34,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:34,174 INFO L225 Difference]: With dead ends: 5242 [2021-06-01 20:54:34,174 INFO L226 Difference]: Without dead ends: 5242 [2021-06-01 20:54:34,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 2684.5ms TimeCoverageRelationStatistics Valid=966, Invalid=7406, Unknown=0, NotChecked=0, Total=8372 [2021-06-01 20:54:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2021-06-01 20:54:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4659. [2021-06-01 20:54:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.343924431086303) internal successors, (10918), 4658 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 10918 transitions. [2021-06-01 20:54:34,224 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 10918 transitions. Word has length 37 [2021-06-01 20:54:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:34,224 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 10918 transitions. [2021-06-01 20:54:34,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-06-01 20:54:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 10918 transitions. [2021-06-01 20:54:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:34,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:34,228 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:34,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-01 20:54:34,429 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -376851599, now seen corresponding path program 102 times [2021-06-01 20:54:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:34,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078423189] [2021-06-01 20:54:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:34,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:34,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078423189] [2021-06-01 20:54:34,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078423189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:34,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943399536] [2021-06-01 20:54:34,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:34,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:54:34,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:34,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-01 20:54:34,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:35,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943399536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:35,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:35,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-01 20:54:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923964251] [2021-06-01 20:54:35,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:54:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:54:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:54:35,465 INFO L87 Difference]: Start difference. First operand 4659 states and 10918 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:38,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:38,067 INFO L93 Difference]: Finished difference Result 5461 states and 12630 transitions. [2021-06-01 20:54:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-01 20:54:38,068 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 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 [2021-06-01 20:54:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:38,072 INFO L225 Difference]: With dead ends: 5461 [2021-06-01 20:54:38,072 INFO L226 Difference]: Without dead ends: 5461 [2021-06-01 20:54:38,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2579.2ms TimeCoverageRelationStatistics Valid=635, Invalid=5845, Unknown=0, NotChecked=0, Total=6480 [2021-06-01 20:54:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-01 20:54:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 4679. [2021-06-01 20:54:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 2.344164172723386) internal successors, (10966), 4678 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 10966 transitions. [2021-06-01 20:54:38,116 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 10966 transitions. Word has length 37 [2021-06-01 20:54:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:38,116 INFO L482 AbstractCegarLoop]: Abstraction has 4679 states and 10966 transitions. [2021-06-01 20:54:38,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 10966 transitions. [2021-06-01 20:54:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:38,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:38,120 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:38,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1532,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:38,321 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:38,321 INFO L82 PathProgramCache]: Analyzing trace with hash 719191221, now seen corresponding path program 103 times [2021-06-01 20:54:38,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:38,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038363703] [2021-06-01 20:54:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:38,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:38,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038363703] [2021-06-01 20:54:38,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038363703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:38,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162627972] [2021-06-01 20:54:38,578 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 [2021-06-01 20:54:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-01 20:54:38,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:39,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162627972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:39,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:39,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-01 20:54:39,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924898834] [2021-06-01 20:54:39,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:54:39,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:39,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:54:39,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:54:39,268 INFO L87 Difference]: Start difference. First operand 4679 states and 10966 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:42,129 INFO L93 Difference]: Finished difference Result 5286 states and 12264 transitions. [2021-06-01 20:54:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-01 20:54:42,129 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 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 [2021-06-01 20:54:42,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:42,134 INFO L225 Difference]: With dead ends: 5286 [2021-06-01 20:54:42,134 INFO L226 Difference]: Without dead ends: 5286 [2021-06-01 20:54:42,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2588.4ms TimeCoverageRelationStatistics Valid=699, Invalid=6273, Unknown=0, NotChecked=0, Total=6972 [2021-06-01 20:54:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-06-01 20:54:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4683. [2021-06-01 20:54:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 4682 states have (on average 2.344724476719351) internal successors, (10978), 4682 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 10978 transitions. [2021-06-01 20:54:42,180 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 10978 transitions. Word has length 37 [2021-06-01 20:54:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:42,180 INFO L482 AbstractCegarLoop]: Abstraction has 4683 states and 10978 transitions. [2021-06-01 20:54:42,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 10978 transitions. [2021-06-01 20:54:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:42,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:42,183 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:42,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-06-01 20:54:42,384 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1551615737, now seen corresponding path program 104 times [2021-06-01 20:54:42,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:42,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439022091] [2021-06-01 20:54:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:42,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:42,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439022091] [2021-06-01 20:54:42,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439022091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:42,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524578725] [2021-06-01 20:54:42,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:42,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:54:42,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-01 20:54:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:43,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524578725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:43,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:43,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-01 20:54:43,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163692824] [2021-06-01 20:54:43,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:54:43,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:43,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:54:43,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:54:43,189 INFO L87 Difference]: Start difference. First operand 4683 states and 10978 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:54:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:49,174 INFO L93 Difference]: Finished difference Result 6084 states and 13860 transitions. [2021-06-01 20:54:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-01 20:54:49,174 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 37 [2021-06-01 20:54:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:49,180 INFO L225 Difference]: With dead ends: 6084 [2021-06-01 20:54:49,180 INFO L226 Difference]: Without dead ends: 6042 [2021-06-01 20:54:49,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7850 ImplicationChecksByTransitivity, 5279.4ms TimeCoverageRelationStatistics Valid=1871, Invalid=21081, Unknown=0, NotChecked=0, Total=22952 [2021-06-01 20:54:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2021-06-01 20:54:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 4770. [2021-06-01 20:54:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 2.3514363598238623) internal successors, (11214), 4769 states have internal predecessors, (11214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 11214 transitions. [2021-06-01 20:54:49,233 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 11214 transitions. Word has length 37 [2021-06-01 20:54:49,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:49,233 INFO L482 AbstractCegarLoop]: Abstraction has 4770 states and 11214 transitions. [2021-06-01 20:54:49,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:54:49,233 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 11214 transitions. [2021-06-01 20:54:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:49,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:49,237 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:49,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-06-01 20:54:49,437 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1422873149, now seen corresponding path program 105 times [2021-06-01 20:54:49,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:49,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102198755] [2021-06-01 20:54:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:49,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:49,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102198755] [2021-06-01 20:54:49,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102198755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:49,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109617459] [2021-06-01 20:54:49,697 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 [2021-06-01 20:54:49,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:54:49,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:54:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:50,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109617459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:50,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:50,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-01 20:54:50,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999082391] [2021-06-01 20:54:50,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:54:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:50,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:54:50,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:54:50,237 INFO L87 Difference]: Start difference. First operand 4770 states and 11214 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:54:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:54,572 INFO L93 Difference]: Finished difference Result 6513 states and 14860 transitions. [2021-06-01 20:54:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-01 20:54:54,573 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 37 [2021-06-01 20:54:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:54,578 INFO L225 Difference]: With dead ends: 6513 [2021-06-01 20:54:54,578 INFO L226 Difference]: Without dead ends: 6447 [2021-06-01 20:54:54,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 3913.3ms TimeCoverageRelationStatistics Valid=1486, Invalid=12794, Unknown=0, NotChecked=0, Total=14280 [2021-06-01 20:54:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-06-01 20:54:54,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 4842. [2021-06-01 20:54:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4842 states, 4841 states have (on average 2.3462094608551953) internal successors, (11358), 4841 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 11358 transitions. [2021-06-01 20:54:54,631 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 11358 transitions. Word has length 37 [2021-06-01 20:54:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:54,631 INFO L482 AbstractCegarLoop]: Abstraction has 4842 states and 11358 transitions. [2021-06-01 20:54:54,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:54:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 11358 transitions. [2021-06-01 20:54:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:54,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:54,635 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:54,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1588 [2021-06-01 20:54:54,835 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:54,835 INFO L82 PathProgramCache]: Analyzing trace with hash -196919433, now seen corresponding path program 106 times [2021-06-01 20:54:54,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:54,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995779445] [2021-06-01 20:54:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:55,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:55,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995779445] [2021-06-01 20:54:55,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995779445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:55,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808228943] [2021-06-01 20:54:55,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:55,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:54:55,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:55,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-01 20:54:55,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:55,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808228943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:55,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:55,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-01 20:54:55,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601172728] [2021-06-01 20:54:55,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 20:54:55,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 20:54:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-01 20:54:55,776 INFO L87 Difference]: Start difference. First operand 4842 states and 11358 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:54:57,741 INFO L93 Difference]: Finished difference Result 5247 states and 12151 transitions. [2021-06-01 20:54:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-01 20:54:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:54:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:54:57,746 INFO L225 Difference]: With dead ends: 5247 [2021-06-01 20:54:57,746 INFO L226 Difference]: Without dead ends: 5247 [2021-06-01 20:54:57,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1950.3ms TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2021-06-01 20:54:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-06-01 20:54:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 4860. [2021-06-01 20:54:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 2.3461617616793577) internal successors, (11400), 4859 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 11400 transitions. [2021-06-01 20:54:57,795 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 11400 transitions. Word has length 37 [2021-06-01 20:54:57,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:54:57,795 INFO L482 AbstractCegarLoop]: Abstraction has 4860 states and 11400 transitions. [2021-06-01 20:54:57,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:54:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 11400 transitions. [2021-06-01 20:54:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:54:57,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:54:57,799 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:54:57,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:58,000 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:54:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:54:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1929285887, now seen corresponding path program 107 times [2021-06-01 20:54:58,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:54:58,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460050023] [2021-06-01 20:54:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:54:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:54:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:58,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:54:58,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460050023] [2021-06-01 20:54:58,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460050023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:58,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60856859] [2021-06-01 20:54:58,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:54:58,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:54:58,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:54:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:54:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:54:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:54:59,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60856859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:54:59,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:54:59,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-01 20:54:59,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027701221] [2021-06-01 20:54:59,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 20:54:59,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:54:59,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 20:54:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-01 20:54:59,038 INFO L87 Difference]: Start difference. First operand 4860 states and 11400 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:01,635 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-01 20:55:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:02,216 INFO L93 Difference]: Finished difference Result 5227 states and 12121 transitions. [2021-06-01 20:55:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 20:55:02,217 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:55:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:02,221 INFO L225 Difference]: With dead ends: 5227 [2021-06-01 20:55:02,221 INFO L226 Difference]: Without dead ends: 5227 [2021-06-01 20:55:02,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2989.0ms TimeCoverageRelationStatistics Valid=669, Invalid=5183, Unknown=0, NotChecked=0, Total=5852 [2021-06-01 20:55:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-06-01 20:55:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4864. [2021-06-01 20:55:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4864 states, 4863 states have (on average 2.346699568167798) internal successors, (11412), 4863 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4864 states to 4864 states and 11412 transitions. [2021-06-01 20:55:02,277 INFO L78 Accepts]: Start accepts. Automaton has 4864 states and 11412 transitions. Word has length 37 [2021-06-01 20:55:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:02,277 INFO L482 AbstractCegarLoop]: Abstraction has 4864 states and 11412 transitions. [2021-06-01 20:55:02,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4864 states and 11412 transitions. [2021-06-01 20:55:02,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:02,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:02,282 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:02,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:55:02,498 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:02,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1533256893, now seen corresponding path program 108 times [2021-06-01 20:55:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:02,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361053036] [2021-06-01 20:55:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:02,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:02,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361053036] [2021-06-01 20:55:02,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361053036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:02,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559240069] [2021-06-01 20:55:02,821 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 [2021-06-01 20:55:02,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:55:02,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:02,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:55:02,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:03,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559240069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:03,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:03,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-01 20:55:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414486629] [2021-06-01 20:55:03,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 20:55:03,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 20:55:03,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-01 20:55:03,557 INFO L87 Difference]: Start difference. First operand 4864 states and 11412 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:06,515 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-01 20:55:06,745 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-01 20:55:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:06,913 INFO L93 Difference]: Finished difference Result 5273 states and 12215 transitions. [2021-06-01 20:55:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-01 20:55:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:55:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:06,918 INFO L225 Difference]: With dead ends: 5273 [2021-06-01 20:55:06,918 INFO L226 Difference]: Without dead ends: 5273 [2021-06-01 20:55:06,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 3281.1ms TimeCoverageRelationStatistics Valid=786, Invalid=5856, Unknown=0, NotChecked=0, Total=6642 [2021-06-01 20:55:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-06-01 20:55:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 4870. [2021-06-01 20:55:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4869 states have (on average 2.347915383035531) internal successors, (11432), 4869 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 11432 transitions. [2021-06-01 20:55:06,969 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 11432 transitions. Word has length 37 [2021-06-01 20:55:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:06,969 INFO L482 AbstractCegarLoop]: Abstraction has 4870 states and 11432 transitions. [2021-06-01 20:55:06,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 11432 transitions. [2021-06-01 20:55:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:06,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:06,973 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:07,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-06-01 20:55:07,174 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:07,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1661999481, now seen corresponding path program 109 times [2021-06-01 20:55:07,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:07,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437275703] [2021-06-01 20:55:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:07,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:07,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437275703] [2021-06-01 20:55:07,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437275703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551595077] [2021-06-01 20:55:07,491 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 [2021-06-01 20:55:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:07,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-01 20:55:07,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:08,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551595077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:08,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:08,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-01 20:55:08,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448885586] [2021-06-01 20:55:08,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 20:55:08,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:08,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 20:55:08,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-01 20:55:08,260 INFO L87 Difference]: Start difference. First operand 4870 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:11,750 INFO L93 Difference]: Finished difference Result 5834 states and 13420 transitions. [2021-06-01 20:55:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-01 20:55:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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 37 [2021-06-01 20:55:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:11,756 INFO L225 Difference]: With dead ends: 5834 [2021-06-01 20:55:11,756 INFO L226 Difference]: Without dead ends: 5834 [2021-06-01 20:55:11,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2240 ImplicationChecksByTransitivity, 3414.4ms TimeCoverageRelationStatistics Valid=930, Invalid=6552, Unknown=0, NotChecked=0, Total=7482 [2021-06-01 20:55:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-06-01 20:55:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 4915. [2021-06-01 20:55:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 2.349409849409849) internal successors, (11545), 4914 states have internal predecessors, (11545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 11545 transitions. [2021-06-01 20:55:11,812 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 11545 transitions. Word has length 37 [2021-06-01 20:55:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:11,813 INFO L482 AbstractCegarLoop]: Abstraction has 4915 states and 11545 transitions. [2021-06-01 20:55:11,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 11545 transitions. [2021-06-01 20:55:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:11,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:11,817 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:12,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:55:12,017 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1011930511, now seen corresponding path program 110 times [2021-06-01 20:55:12,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:12,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000298496] [2021-06-01 20:55:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:12,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000298496] [2021-06-01 20:55:12,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000298496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:12,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084052349] [2021-06-01 20:55:12,320 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 [2021-06-01 20:55:12,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:55:12,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:12,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-01 20:55:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:13,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084052349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:13,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:13,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-01 20:55:13,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847738947] [2021-06-01 20:55:13,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:55:13,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:55:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:55:13,026 INFO L87 Difference]: Start difference. First operand 4915 states and 11545 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:15,421 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-01 20:55:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:16,509 INFO L93 Difference]: Finished difference Result 5198 states and 12074 transitions. [2021-06-01 20:55:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-01 20:55:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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 37 [2021-06-01 20:55:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:16,515 INFO L225 Difference]: With dead ends: 5198 [2021-06-01 20:55:16,515 INFO L226 Difference]: Without dead ends: 5194 [2021-06-01 20:55:16,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 3085.3ms TimeCoverageRelationStatistics Valid=695, Invalid=5467, Unknown=0, NotChecked=0, Total=6162 [2021-06-01 20:55:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-01 20:55:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4902. [2021-06-01 20:55:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 4901 states have (on average 2.3472760661089573) internal successors, (11504), 4901 states have internal predecessors, (11504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 11504 transitions. [2021-06-01 20:55:16,574 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 11504 transitions. Word has length 37 [2021-06-01 20:55:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:16,574 INFO L482 AbstractCegarLoop]: Abstraction has 4902 states and 11504 transitions. [2021-06-01 20:55:16,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 11504 transitions. [2021-06-01 20:55:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:16,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:16,578 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:16,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-06-01 20:55:16,780 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash 783554167, now seen corresponding path program 111 times [2021-06-01 20:55:16,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:16,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762855116] [2021-06-01 20:55:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:17,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:17,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762855116] [2021-06-01 20:55:17,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762855116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:17,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814700361] [2021-06-01 20:55:17,059 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 [2021-06-01 20:55:17,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:55:17,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:17,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-01 20:55:17,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:17,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814700361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:17,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:17,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-06-01 20:55:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229018920] [2021-06-01 20:55:17,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:55:17,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:55:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:55:17,482 INFO L87 Difference]: Start difference. First operand 4902 states and 11504 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:20,465 INFO L93 Difference]: Finished difference Result 6564 states and 15090 transitions. [2021-06-01 20:55:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-01 20:55:20,465 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 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 [2021-06-01 20:55:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:20,473 INFO L225 Difference]: With dead ends: 6564 [2021-06-01 20:55:20,473 INFO L226 Difference]: Without dead ends: 6360 [2021-06-01 20:55:20,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 2529.4ms TimeCoverageRelationStatistics Valid=758, Invalid=7432, Unknown=0, NotChecked=0, Total=8190 [2021-06-01 20:55:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-06-01 20:55:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 5277. [2021-06-01 20:55:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 2.3421152388172857) internal successors, (12357), 5276 states have internal predecessors, (12357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 12357 transitions. [2021-06-01 20:55:20,536 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 12357 transitions. Word has length 37 [2021-06-01 20:55:20,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:20,537 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 12357 transitions. [2021-06-01 20:55:20,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 12357 transitions. [2021-06-01 20:55:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:20,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:20,541 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:20,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1715 [2021-06-01 20:55:20,742 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash -136117129, now seen corresponding path program 112 times [2021-06-01 20:55:20,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:20,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484818455] [2021-06-01 20:55:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:20,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:20,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484818455] [2021-06-01 20:55:20,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484818455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:20,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770513590] [2021-06-01 20:55:20,985 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 [2021-06-01 20:55:21,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:55:21,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:21,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:55:21,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:21,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770513590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:21,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:21,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-01 20:55:21,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079369122] [2021-06-01 20:55:21,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:55:21,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:21,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:55:21,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:55:21,634 INFO L87 Difference]: Start difference. First operand 5277 states and 12357 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:24,424 INFO L93 Difference]: Finished difference Result 7190 states and 16637 transitions. [2021-06-01 20:55:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-01 20:55:24,424 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:55:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:24,431 INFO L225 Difference]: With dead ends: 7190 [2021-06-01 20:55:24,431 INFO L226 Difference]: Without dead ends: 7127 [2021-06-01 20:55:24,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2510.7ms TimeCoverageRelationStatistics Valid=766, Invalid=4784, Unknown=0, NotChecked=0, Total=5550 [2021-06-01 20:55:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2021-06-01 20:55:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 5386. [2021-06-01 20:55:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5385 states have (on average 2.337418755803157) internal successors, (12587), 5385 states have internal predecessors, (12587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 12587 transitions. [2021-06-01 20:55:24,497 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 12587 transitions. Word has length 37 [2021-06-01 20:55:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:24,497 INFO L482 AbstractCegarLoop]: Abstraction has 5386 states and 12587 transitions. [2021-06-01 20:55:24,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 12587 transitions. [2021-06-01 20:55:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:24,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:24,501 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:24,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-01 20:55:24,702 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:24,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1645417915, now seen corresponding path program 113 times [2021-06-01 20:55:24,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:24,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898533171] [2021-06-01 20:55:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:24,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898533171] [2021-06-01 20:55:24,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898533171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:24,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899240246] [2021-06-01 20:55:24,982 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 [2021-06-01 20:55:25,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:55:25,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:25,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:55:25,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:25,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899240246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:25,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:25,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-01 20:55:25,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122673956] [2021-06-01 20:55:25,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:55:25,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:25,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:55:25,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:55:25,627 INFO L87 Difference]: Start difference. First operand 5386 states and 12587 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:28,929 INFO L93 Difference]: Finished difference Result 7812 states and 17955 transitions. [2021-06-01 20:55:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-01 20:55:28,930 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:55:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:28,938 INFO L225 Difference]: With dead ends: 7812 [2021-06-01 20:55:28,938 INFO L226 Difference]: Without dead ends: 7773 [2021-06-01 20:55:28,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 3120.8ms TimeCoverageRelationStatistics Valid=993, Invalid=6147, Unknown=0, NotChecked=0, Total=7140 [2021-06-01 20:55:28,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-01 20:55:29,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5464. [2021-06-01 20:55:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5464 states, 5463 states have (on average 2.33479773018488) internal successors, (12755), 5463 states have internal predecessors, (12755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5464 states to 5464 states and 12755 transitions. [2021-06-01 20:55:29,016 INFO L78 Accepts]: Start accepts. Automaton has 5464 states and 12755 transitions. Word has length 37 [2021-06-01 20:55:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:29,016 INFO L482 AbstractCegarLoop]: Abstraction has 5464 states and 12755 transitions. [2021-06-01 20:55:29,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5464 states and 12755 transitions. [2021-06-01 20:55:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:29,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:29,021 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:29,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-06-01 20:55:29,227 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:29,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1356769279, now seen corresponding path program 114 times [2021-06-01 20:55:29,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:29,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124832768] [2021-06-01 20:55:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:29,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:29,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124832768] [2021-06-01 20:55:29,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124832768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:29,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187414632] [2021-06-01 20:55:29,543 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 [2021-06-01 20:55:29,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:55:29,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:29,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:55:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:30,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187414632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:30,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:30,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-01 20:55:30,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938539256] [2021-06-01 20:55:30,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:55:30,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:55:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:55:30,109 INFO L87 Difference]: Start difference. First operand 5464 states and 12755 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:34,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:34,188 INFO L93 Difference]: Finished difference Result 7788 states and 17905 transitions. [2021-06-01 20:55:34,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-01 20:55:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:55:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:34,197 INFO L225 Difference]: With dead ends: 7788 [2021-06-01 20:55:34,197 INFO L226 Difference]: Without dead ends: 7746 [2021-06-01 20:55:34,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 3770.0ms TimeCoverageRelationStatistics Valid=1316, Invalid=7614, Unknown=0, NotChecked=0, Total=8930 [2021-06-01 20:55:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2021-06-01 20:55:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 5484. [2021-06-01 20:55:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 2.335400328287434) internal successors, (12805), 5483 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 12805 transitions. [2021-06-01 20:55:34,269 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 12805 transitions. Word has length 37 [2021-06-01 20:55:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:34,269 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 12805 transitions. [2021-06-01 20:55:34,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 12805 transitions. [2021-06-01 20:55:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:34,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:34,275 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:34,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1774,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:55:34,477 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1945861701, now seen corresponding path program 115 times [2021-06-01 20:55:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:34,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005109579] [2021-06-01 20:55:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:34,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:34,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005109579] [2021-06-01 20:55:34,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005109579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:34,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645808381] [2021-06-01 20:55:34,712 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 [2021-06-01 20:55:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:34,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-01 20:55:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:35,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645808381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:35,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:35,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-01 20:55:35,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849655784] [2021-06-01 20:55:35,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:55:35,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:35,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:55:35,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:55:35,386 INFO L87 Difference]: Start difference. First operand 5484 states and 12805 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:38,079 INFO L93 Difference]: Finished difference Result 5965 states and 13762 transitions. [2021-06-01 20:55:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 20:55:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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 [2021-06-01 20:55:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:38,085 INFO L225 Difference]: With dead ends: 5965 [2021-06-01 20:55:38,085 INFO L226 Difference]: Without dead ends: 5935 [2021-06-01 20:55:38,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2412.9ms TimeCoverageRelationStatistics Valid=658, Invalid=6148, Unknown=0, NotChecked=0, Total=6806 [2021-06-01 20:55:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2021-06-01 20:55:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5492. [2021-06-01 20:55:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5491 states have (on average 2.3352759060280457) internal successors, (12823), 5491 states have internal predecessors, (12823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 12823 transitions. [2021-06-01 20:55:38,140 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 12823 transitions. Word has length 37 [2021-06-01 20:55:38,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:38,140 INFO L482 AbstractCegarLoop]: Abstraction has 5492 states and 12823 transitions. [2021-06-01 20:55:38,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:38,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 12823 transitions. [2021-06-01 20:55:38,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:38,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:38,144 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:38,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-06-01 20:55:38,345 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1113437185, now seen corresponding path program 116 times [2021-06-01 20:55:38,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:38,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210933880] [2021-06-01 20:55:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:38,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:38,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210933880] [2021-06-01 20:55:38,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210933880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:38,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87411467] [2021-06-01 20:55:38,552 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 [2021-06-01 20:55:38,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:55:38,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:38,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-01 20:55:38,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:39,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87411467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:39,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:39,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-01 20:55:39,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7174740] [2021-06-01 20:55:39,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:55:39,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:55:39,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:55:39,285 INFO L87 Difference]: Start difference. First operand 5492 states and 12823 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:42,401 INFO L93 Difference]: Finished difference Result 5816 states and 13464 transitions. [2021-06-01 20:55:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-01 20:55:42,401 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 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 [2021-06-01 20:55:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:42,407 INFO L225 Difference]: With dead ends: 5816 [2021-06-01 20:55:42,407 INFO L226 Difference]: Without dead ends: 5798 [2021-06-01 20:55:42,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 2886.8ms TimeCoverageRelationStatistics Valid=700, Invalid=7132, Unknown=0, NotChecked=0, Total=7832 [2021-06-01 20:55:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-06-01 20:55:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5502. [2021-06-01 20:55:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5502 states, 5501 states have (on average 2.335393564806399) internal successors, (12847), 5501 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 12847 transitions. [2021-06-01 20:55:42,463 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 12847 transitions. Word has length 37 [2021-06-01 20:55:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:42,463 INFO L482 AbstractCegarLoop]: Abstraction has 5502 states and 12847 transitions. [2021-06-01 20:55:42,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:42,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 12847 transitions. [2021-06-01 20:55:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:42,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:42,467 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:42,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-01 20:55:42,669 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1242179773, now seen corresponding path program 117 times [2021-06-01 20:55:42,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:42,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078128364] [2021-06-01 20:55:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:42,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:42,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078128364] [2021-06-01 20:55:42,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078128364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:42,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820093041] [2021-06-01 20:55:42,898 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 [2021-06-01 20:55:42,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:55:42,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:55:42,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:43,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820093041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:43,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:43,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-01 20:55:43,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023935065] [2021-06-01 20:55:43,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-01 20:55:43,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:43,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-01 20:55:43,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 20:55:43,447 INFO L87 Difference]: Start difference. First operand 5502 states and 12847 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-06-01 20:55:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:55,292 INFO L93 Difference]: Finished difference Result 7773 states and 17514 transitions. [2021-06-01 20:55:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-06-01 20:55:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 37 [2021-06-01 20:55:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:55,298 INFO L225 Difference]: With dead ends: 7773 [2021-06-01 20:55:55,299 INFO L226 Difference]: Without dead ends: 7761 [2021-06-01 20:55:55,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22159 ImplicationChecksByTransitivity, 10425.6ms TimeCoverageRelationStatistics Valid=4256, Invalid=51676, Unknown=0, NotChecked=0, Total=55932 [2021-06-01 20:55:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-06-01 20:55:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 5514. [2021-06-01 20:55:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5513 states have (on average 2.3359332486849267) internal successors, (12878), 5513 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 12878 transitions. [2021-06-01 20:55:55,389 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 12878 transitions. Word has length 37 [2021-06-01 20:55:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:55,389 INFO L482 AbstractCegarLoop]: Abstraction has 5514 states and 12878 transitions. [2021-06-01 20:55:55,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-06-01 20:55:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 12878 transitions. [2021-06-01 20:55:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:55,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:55,394 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:55,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:55:55,594 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash -592110803, now seen corresponding path program 118 times [2021-06-01 20:55:55,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:55,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587897896] [2021-06-01 20:55:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:55,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:55,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587897896] [2021-06-01 20:55:55,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587897896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:55,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633885688] [2021-06-01 20:55:55,807 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 [2021-06-01 20:55:55,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:55:55,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:55,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-01 20:55:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:55:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:56,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633885688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:56,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:55:56,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-01 20:55:56,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189492595] [2021-06-01 20:55:56,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:55:56,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:55:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:55:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:55:56,466 INFO L87 Difference]: Start difference. First operand 5514 states and 12878 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:55:59,060 INFO L93 Difference]: Finished difference Result 5766 states and 13384 transitions. [2021-06-01 20:55:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-01 20:55:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:55:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:55:59,065 INFO L225 Difference]: With dead ends: 5766 [2021-06-01 20:55:59,065 INFO L226 Difference]: Without dead ends: 5766 [2021-06-01 20:55:59,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2511.3ms TimeCoverageRelationStatistics Valid=572, Invalid=4978, Unknown=0, NotChecked=0, Total=5550 [2021-06-01 20:55:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-06-01 20:55:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5511. [2021-06-01 20:55:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 2.3364791288566242) internal successors, (12874), 5510 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 12874 transitions. [2021-06-01 20:55:59,115 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 12874 transitions. Word has length 37 [2021-06-01 20:55:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:55:59,115 INFO L482 AbstractCegarLoop]: Abstraction has 5511 states and 12874 transitions. [2021-06-01 20:55:59,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:55:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 12874 transitions. [2021-06-01 20:55:59,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:55:59,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:55:59,119 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:55:59,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1847 [2021-06-01 20:55:59,319 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:55:59,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:55:59,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1231736695, now seen corresponding path program 119 times [2021-06-01 20:55:59,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:55:59,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11582813] [2021-06-01 20:55:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:55:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:55:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:55:59,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:55:59,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11582813] [2021-06-01 20:55:59,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11582813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:55:59,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971523853] [2021-06-01 20:55:59,552 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 [2021-06-01 20:55:59,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:55:59,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:55:59,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:55:59,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:00,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971523853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:00,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:00,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-01 20:56:00,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924673188] [2021-06-01 20:56:00,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:56:00,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:56:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:56:00,290 INFO L87 Difference]: Start difference. First operand 5511 states and 12874 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:56:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:04,560 INFO L93 Difference]: Finished difference Result 6342 states and 14521 transitions. [2021-06-01 20:56:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-01 20:56:04,560 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 37 [2021-06-01 20:56:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:04,566 INFO L225 Difference]: With dead ends: 6342 [2021-06-01 20:56:04,566 INFO L226 Difference]: Without dead ends: 6285 [2021-06-01 20:56:04,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 3853.5ms TimeCoverageRelationStatistics Valid=895, Invalid=10877, Unknown=0, NotChecked=0, Total=11772 [2021-06-01 20:56:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-06-01 20:56:04,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 5541. [2021-06-01 20:56:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 5540 states have (on average 2.334657039711191) internal successors, (12934), 5540 states have internal predecessors, (12934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 12934 transitions. [2021-06-01 20:56:04,622 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 12934 transitions. Word has length 37 [2021-06-01 20:56:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:04,623 INFO L482 AbstractCegarLoop]: Abstraction has 5541 states and 12934 transitions. [2021-06-01 20:56:04,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:56:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 12934 transitions. [2021-06-01 20:56:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:04,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:04,627 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:04,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-06-01 20:56:04,828 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1935418623, now seen corresponding path program 120 times [2021-06-01 20:56:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:04,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625772137] [2021-06-01 20:56:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:05,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:05,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625772137] [2021-06-01 20:56:05,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625772137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:05,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068948554] [2021-06-01 20:56:05,051 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 [2021-06-01 20:56:05,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:56:05,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:56:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-01 20:56:05,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:05,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068948554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:05,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:05,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-01 20:56:05,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118371178] [2021-06-01 20:56:05,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:56:05,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:05,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:56:05,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:56:05,613 INFO L87 Difference]: Start difference. First operand 5541 states and 12934 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:56:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:20,094 INFO L93 Difference]: Finished difference Result 8099 states and 18208 transitions. [2021-06-01 20:56:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-06-01 20:56:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 37 [2021-06-01 20:56:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:20,101 INFO L225 Difference]: With dead ends: 8099 [2021-06-01 20:56:20,102 INFO L226 Difference]: Without dead ends: 8087 [2021-06-01 20:56:20,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37586 ImplicationChecksByTransitivity, 12905.4ms TimeCoverageRelationStatistics Valid=6402, Invalid=84500, Unknown=0, NotChecked=0, Total=90902 [2021-06-01 20:56:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2021-06-01 20:56:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 5547. [2021-06-01 20:56:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5547 states, 5546 states have (on average 2.3348359177785794) internal successors, (12949), 5546 states have internal predecessors, (12949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5547 states to 5547 states and 12949 transitions. [2021-06-01 20:56:20,168 INFO L78 Accepts]: Start accepts. Automaton has 5547 states and 12949 transitions. Word has length 37 [2021-06-01 20:56:20,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:20,168 INFO L482 AbstractCegarLoop]: Abstraction has 5547 states and 12949 transitions. [2021-06-01 20:56:20,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:56:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5547 states and 12949 transitions. [2021-06-01 20:56:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:20,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:20,173 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:20,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-06-01 20:56:20,375 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1709479703, now seen corresponding path program 121 times [2021-06-01 20:56:20,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:20,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198939020] [2021-06-01 20:56:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:20,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:20,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198939020] [2021-06-01 20:56:20,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198939020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:20,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625550976] [2021-06-01 20:56:20,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:20,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-01 20:56:20,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:21,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625550976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:21,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:21,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-01 20:56:21,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601636329] [2021-06-01 20:56:21,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:56:21,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:21,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:56:21,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:56:21,349 INFO L87 Difference]: Start difference. First operand 5547 states and 12949 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:24,854 INFO L93 Difference]: Finished difference Result 6293 states and 14448 transitions. [2021-06-01 20:56:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-01 20:56:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:56:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:24,860 INFO L225 Difference]: With dead ends: 6293 [2021-06-01 20:56:24,861 INFO L226 Difference]: Without dead ends: 6284 [2021-06-01 20:56:24,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 3093.7ms TimeCoverageRelationStatistics Valid=749, Invalid=7623, Unknown=0, NotChecked=0, Total=8372 [2021-06-01 20:56:24,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-06-01 20:56:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 5583. [2021-06-01 20:56:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 2.3350053744177712) internal successors, (13034), 5582 states have internal predecessors, (13034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 13034 transitions. [2021-06-01 20:56:24,931 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 13034 transitions. Word has length 37 [2021-06-01 20:56:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:24,931 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 13034 transitions. [2021-06-01 20:56:24,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 13034 transitions. [2021-06-01 20:56:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:24,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:24,935 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:25,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1910 [2021-06-01 20:56:25,136 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash 956173311, now seen corresponding path program 122 times [2021-06-01 20:56:25,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:25,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108288555] [2021-06-01 20:56:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:25,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108288555] [2021-06-01 20:56:25,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108288555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650375197] [2021-06-01 20:56:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:25,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:56:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:56:25,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:56:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:25,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650375197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:25,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:25,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-01 20:56:25,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902684081] [2021-06-01 20:56:25,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:56:25,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:56:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:56:25,910 INFO L87 Difference]: Start difference. First operand 5583 states and 13034 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:26,820 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-01 20:56:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:29,532 INFO L93 Difference]: Finished difference Result 7671 states and 17703 transitions. [2021-06-01 20:56:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 20:56:29,532 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:56:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:29,540 INFO L225 Difference]: With dead ends: 7671 [2021-06-01 20:56:29,540 INFO L226 Difference]: Without dead ends: 7636 [2021-06-01 20:56:29,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3419.1ms TimeCoverageRelationStatistics Valid=1319, Invalid=6871, Unknown=0, NotChecked=0, Total=8190 [2021-06-01 20:56:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7636 states. [2021-06-01 20:56:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7636 to 5598. [2021-06-01 20:56:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 2.3353582276219402) internal successors, (13071), 5597 states have internal predecessors, (13071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 13071 transitions. [2021-06-01 20:56:29,606 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 13071 transitions. Word has length 37 [2021-06-01 20:56:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:29,606 INFO L482 AbstractCegarLoop]: Abstraction has 5598 states and 13071 transitions. [2021-06-01 20:56:29,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 13071 transitions. [2021-06-01 20:56:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:29,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:29,610 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:29,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1928,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:29,811 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1447643043, now seen corresponding path program 123 times [2021-06-01 20:56:29,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:29,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220958265] [2021-06-01 20:56:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:29,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:29,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220958265] [2021-06-01 20:56:29,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220958265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:29,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488085638] [2021-06-01 20:56:29,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:30,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-01 20:56:30,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:56:30,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-01 20:56:30,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 20:56:30,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488085638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:30,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:30,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-06-01 20:56:30,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508957065] [2021-06-01 20:56:30,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-01 20:56:30,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:30,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-01 20:56:30,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-01 20:56:30,407 INFO L87 Difference]: Start difference. First operand 5598 states and 13071 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:31,011 INFO L93 Difference]: Finished difference Result 6845 states and 15895 transitions. [2021-06-01 20:56:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-01 20:56:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:56:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:31,018 INFO L225 Difference]: With dead ends: 6845 [2021-06-01 20:56:31,018 INFO L226 Difference]: Without dead ends: 6841 [2021-06-01 20:56:31,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 750.0ms TimeCoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2021-06-01 20:56:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-06-01 20:56:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 5631. [2021-06-01 20:56:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.3408525754884546) internal successors, (13179), 5630 states have internal predecessors, (13179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:31,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 13179 transitions. [2021-06-01 20:56:31,083 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 13179 transitions. Word has length 37 [2021-06-01 20:56:31,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:31,083 INFO L482 AbstractCegarLoop]: Abstraction has 5631 states and 13179 transitions. [2021-06-01 20:56:31,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 13179 transitions. [2021-06-01 20:56:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:31,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:31,088 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:31,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-06-01 20:56:31,290 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:31,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2142478777, now seen corresponding path program 124 times [2021-06-01 20:56:31,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:31,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701886003] [2021-06-01 20:56:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:31,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:31,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701886003] [2021-06-01 20:56:31,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701886003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:31,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897436108] [2021-06-01 20:56:31,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:31,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:56:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:56:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:56:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:32,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897436108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:32,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:32,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-01 20:56:32,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138350438] [2021-06-01 20:56:32,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:56:32,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:32,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:56:32,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:56:32,098 INFO L87 Difference]: Start difference. First operand 5631 states and 13179 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:35,667 INFO L93 Difference]: Finished difference Result 8549 states and 19665 transitions. [2021-06-01 20:56:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-01 20:56:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:56:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:35,675 INFO L225 Difference]: With dead ends: 8549 [2021-06-01 20:56:35,676 INFO L226 Difference]: Without dead ends: 8498 [2021-06-01 20:56:35,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 3324.9ms TimeCoverageRelationStatistics Valid=959, Invalid=5683, Unknown=0, NotChecked=0, Total=6642 [2021-06-01 20:56:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2021-06-01 20:56:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 5868. [2021-06-01 20:56:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 2.3441281745355376) internal successors, (13753), 5867 states have internal predecessors, (13753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 13753 transitions. [2021-06-01 20:56:35,753 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 13753 transitions. Word has length 37 [2021-06-01 20:56:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:35,754 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 13753 transitions. [2021-06-01 20:56:35,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 13753 transitions. [2021-06-01 20:56:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:35,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:35,758 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:35,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:35,959 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1847263995, now seen corresponding path program 125 times [2021-06-01 20:56:35,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:35,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298549687] [2021-06-01 20:56:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:36,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298549687] [2021-06-01 20:56:36,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298549687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:36,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209382476] [2021-06-01 20:56:36,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:36,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:56:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:56:36,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-01 20:56:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:37,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209382476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:37,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:37,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-01 20:56:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578616238] [2021-06-01 20:56:37,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:56:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:37,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:56:37,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:56:37,098 INFO L87 Difference]: Start difference. First operand 5868 states and 13753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:39,149 INFO L93 Difference]: Finished difference Result 6341 states and 14705 transitions. [2021-06-01 20:56:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-01 20:56:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 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 [2021-06-01 20:56:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:39,155 INFO L225 Difference]: With dead ends: 6341 [2021-06-01 20:56:39,156 INFO L226 Difference]: Without dead ends: 6287 [2021-06-01 20:56:39,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2360.4ms TimeCoverageRelationStatistics Valid=431, Invalid=4971, Unknown=0, NotChecked=0, Total=5402 [2021-06-01 20:56:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2021-06-01 20:56:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 6016. [2021-06-01 20:56:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.342975893599335) internal successors, (14093), 6015 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 14093 transitions. [2021-06-01 20:56:39,217 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 14093 transitions. Word has length 37 [2021-06-01 20:56:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:39,217 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 14093 transitions. [2021-06-01 20:56:39,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 14093 transitions. [2021-06-01 20:56:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:39,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:39,223 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:39,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1989 [2021-06-01 20:56:39,426 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash -321497981, now seen corresponding path program 126 times [2021-06-01 20:56:39,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:39,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564631442] [2021-06-01 20:56:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:39,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:39,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564631442] [2021-06-01 20:56:39,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564631442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:39,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924569373] [2021-06-01 20:56:39,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:39,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:56:39,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:56:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:56:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:40,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924569373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:40,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:40,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-01 20:56:40,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142331882] [2021-06-01 20:56:40,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:56:40,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:40,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:56:40,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:56:40,506 INFO L87 Difference]: Start difference. First operand 6016 states and 14093 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:56:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:44,917 INFO L93 Difference]: Finished difference Result 6444 states and 14954 transitions. [2021-06-01 20:56:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-01 20:56:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 37 [2021-06-01 20:56:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:44,923 INFO L225 Difference]: With dead ends: 6444 [2021-06-01 20:56:44,923 INFO L226 Difference]: Without dead ends: 6408 [2021-06-01 20:56:44,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 4285.4ms TimeCoverageRelationStatistics Valid=738, Invalid=9564, Unknown=0, NotChecked=0, Total=10302 [2021-06-01 20:56:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2021-06-01 20:56:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6108. [2021-06-01 20:56:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 2.3430489602095954) internal successors, (14309), 6107 states have internal predecessors, (14309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 14309 transitions. [2021-06-01 20:56:44,988 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 14309 transitions. Word has length 37 [2021-06-01 20:56:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:44,988 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 14309 transitions. [2021-06-01 20:56:44,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:56:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 14309 transitions. [2021-06-01 20:56:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:44,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:44,993 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:45,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-06-01 20:56:45,201 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:45,201 INFO L82 PathProgramCache]: Analyzing trace with hash 510926535, now seen corresponding path program 127 times [2021-06-01 20:56:45,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:45,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441993601] [2021-06-01 20:56:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:45,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:45,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441993601] [2021-06-01 20:56:45,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441993601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:45,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995232237] [2021-06-01 20:56:45,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:45,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:56:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995232237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:46,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:46,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-01 20:56:46,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378853173] [2021-06-01 20:56:46,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:56:46,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:46,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:56:46,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:56:46,218 INFO L87 Difference]: Start difference. First operand 6108 states and 14309 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:56:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:50,920 INFO L93 Difference]: Finished difference Result 6490 states and 15036 transitions. [2021-06-01 20:56:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-01 20:56:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 37 [2021-06-01 20:56:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:50,927 INFO L225 Difference]: With dead ends: 6490 [2021-06-01 20:56:50,927 INFO L226 Difference]: Without dead ends: 6421 [2021-06-01 20:56:50,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4413.1ms TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-06-01 20:56:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-01 20:56:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6086. [2021-06-01 20:56:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 6085 states have (on average 2.341988496302383) internal successors, (14251), 6085 states have internal predecessors, (14251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 14251 transitions. [2021-06-01 20:56:51,002 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 14251 transitions. Word has length 37 [2021-06-01 20:56:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:51,002 INFO L482 AbstractCegarLoop]: Abstraction has 6086 states and 14251 transitions. [2021-06-01 20:56:51,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:56:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 14251 transitions. [2021-06-01 20:56:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:51,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:51,009 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:51,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:51,222 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1467229701, now seen corresponding path program 128 times [2021-06-01 20:56:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:51,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290433327] [2021-06-01 20:56:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:51,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:51,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290433327] [2021-06-01 20:56:51,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290433327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:51,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860657174] [2021-06-01 20:56:51,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:51,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:56:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:56:51,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-01 20:56:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:52,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860657174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:52,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:52,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-01 20:56:52,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633086694] [2021-06-01 20:56:52,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:56:52,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:52,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:56:52,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:56:52,383 INFO L87 Difference]: Start difference. First operand 6086 states and 14251 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:56:55,515 INFO L93 Difference]: Finished difference Result 6707 states and 15582 transitions. [2021-06-01 20:56:55,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-01 20:56:55,515 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 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 [2021-06-01 20:56:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:56:55,522 INFO L225 Difference]: With dead ends: 6707 [2021-06-01 20:56:55,522 INFO L226 Difference]: Without dead ends: 6707 [2021-06-01 20:56:55,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 3089.1ms TimeCoverageRelationStatistics Valid=745, Invalid=7627, Unknown=0, NotChecked=0, Total=8372 [2021-06-01 20:56:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2021-06-01 20:56:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6194. [2021-06-01 20:56:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 2.3437752300984984) internal successors, (14515), 6193 states have internal predecessors, (14515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 14515 transitions. [2021-06-01 20:56:55,593 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 14515 transitions. Word has length 37 [2021-06-01 20:56:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:56:55,594 INFO L482 AbstractCegarLoop]: Abstraction has 6194 states and 14515 transitions. [2021-06-01 20:56:55,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:56:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 14515 transitions. [2021-06-01 20:56:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:56:55,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:56:55,599 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:56:55,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-06-01 20:56:55,800 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:56:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:56:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash -371186881, now seen corresponding path program 129 times [2021-06-01 20:56:55,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:56:55,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075662184] [2021-06-01 20:56:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:56:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:56:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:56,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:56:56,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075662184] [2021-06-01 20:56:56,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075662184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:56,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404498031] [2021-06-01 20:56:56,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:56:56,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:56:56,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:56:56,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:56:56,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:56:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:56:56,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404498031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:56:56,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:56:56,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-01 20:56:56,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068149797] [2021-06-01 20:56:56,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:56:56,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:56:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:56:56,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:56:56,753 INFO L87 Difference]: Start difference. First operand 6194 states and 14515 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:57:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:00,693 INFO L93 Difference]: Finished difference Result 6899 states and 15927 transitions. [2021-06-01 20:57:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-01 20:57:00,693 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 37 [2021-06-01 20:57:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:00,700 INFO L225 Difference]: With dead ends: 6899 [2021-06-01 20:57:00,700 INFO L226 Difference]: Without dead ends: 6848 [2021-06-01 20:57:00,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3648.9ms TimeCoverageRelationStatistics Valid=676, Invalid=9626, Unknown=0, NotChecked=0, Total=10302 [2021-06-01 20:57:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-06-01 20:57:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6222. [2021-06-01 20:57:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.344639125542517) internal successors, (14586), 6221 states have internal predecessors, (14586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 14586 transitions. [2021-06-01 20:57:00,773 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 14586 transitions. Word has length 37 [2021-06-01 20:57:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:00,773 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 14586 transitions. [2021-06-01 20:57:00,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:57:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 14586 transitions. [2021-06-01 20:57:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:00,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:00,778 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:00,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2070 [2021-06-01 20:57:00,979 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:00,979 INFO L82 PathProgramCache]: Analyzing trace with hash 461237635, now seen corresponding path program 130 times [2021-06-01 20:57:00,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:00,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404637509] [2021-06-01 20:57:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:01,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404637509] [2021-06-01 20:57:01,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404637509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467212100] [2021-06-01 20:57:01,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:01,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:57:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:57:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-01 20:57:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:01,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467212100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:01,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:01,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-01 20:57:01,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549784232] [2021-06-01 20:57:01,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:57:01,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:01,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:57:01,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:57:01,986 INFO L87 Difference]: Start difference. First operand 6222 states and 14586 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:57:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:07,594 INFO L93 Difference]: Finished difference Result 6675 states and 15477 transitions. [2021-06-01 20:57:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-01 20:57:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 37 [2021-06-01 20:57:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:07,599 INFO L225 Difference]: With dead ends: 6675 [2021-06-01 20:57:07,599 INFO L226 Difference]: Without dead ends: 6603 [2021-06-01 20:57:07,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 5205.7ms TimeCoverageRelationStatistics Valid=1103, Invalid=14397, Unknown=0, NotChecked=0, Total=15500 [2021-06-01 20:57:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2021-06-01 20:57:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6260. [2021-06-01 20:57:07,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 6259 states have (on average 2.3447835117430897) internal successors, (14676), 6259 states have internal predecessors, (14676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 14676 transitions. [2021-06-01 20:57:07,662 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 14676 transitions. Word has length 37 [2021-06-01 20:57:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:07,662 INFO L482 AbstractCegarLoop]: Abstraction has 6260 states and 14676 transitions. [2021-06-01 20:57:07,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:57:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 14676 transitions. [2021-06-01 20:57:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:07,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:07,667 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:07,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:07,867 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1488555781, now seen corresponding path program 131 times [2021-06-01 20:57:07,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:07,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544973914] [2021-06-01 20:57:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:08,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:08,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544973914] [2021-06-01 20:57:08,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544973914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:08,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252354257] [2021-06-01 20:57:08,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:08,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:57:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:57:08,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-01 20:57:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:08,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252354257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:08,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:08,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-01 20:57:08,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913738161] [2021-06-01 20:57:08,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-01 20:57:08,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:08,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-01 20:57:08,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-01 20:57:08,918 INFO L87 Difference]: Start difference. First operand 6260 states and 14676 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:11,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:11,345 INFO L93 Difference]: Finished difference Result 6797 states and 15791 transitions. [2021-06-01 20:57:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 20:57:11,345 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 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 [2021-06-01 20:57:11,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:11,352 INFO L225 Difference]: With dead ends: 6797 [2021-06-01 20:57:11,352 INFO L226 Difference]: Without dead ends: 6755 [2021-06-01 20:57:11,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2500.5ms TimeCoverageRelationStatistics Valid=725, Invalid=6415, Unknown=0, NotChecked=0, Total=7140 [2021-06-01 20:57:11,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-06-01 20:57:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6340. [2021-06-01 20:57:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 2.3420097807225115) internal successors, (14846), 6339 states have internal predecessors, (14846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 14846 transitions. [2021-06-01 20:57:11,425 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 14846 transitions. Word has length 37 [2021-06-01 20:57:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:11,425 INFO L482 AbstractCegarLoop]: Abstraction has 6340 states and 14846 transitions. [2021-06-01 20:57:11,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 14846 transitions. [2021-06-01 20:57:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:11,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:11,431 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:11,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2116 [2021-06-01 20:57:11,632 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:11,632 INFO L82 PathProgramCache]: Analyzing trace with hash -784873853, now seen corresponding path program 132 times [2021-06-01 20:57:11,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:11,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74078712] [2021-06-01 20:57:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:11,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:11,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74078712] [2021-06-01 20:57:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74078712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:11,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448644653] [2021-06-01 20:57:11,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:11,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:57:11,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:57:11,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:57:11,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:12,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448644653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:12,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:12,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-01 20:57:12,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39220494] [2021-06-01 20:57:12,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:57:12,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:57:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:57:12,567 INFO L87 Difference]: Start difference. First operand 6340 states and 14846 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:57:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:27,525 INFO L93 Difference]: Finished difference Result 8496 states and 19273 transitions. [2021-06-01 20:57:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-06-01 20:57:27,526 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 37 [2021-06-01 20:57:27,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:27,535 INFO L225 Difference]: With dead ends: 8496 [2021-06-01 20:57:27,535 INFO L226 Difference]: Without dead ends: 8484 [2021-06-01 20:57:27,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28541 ImplicationChecksByTransitivity, 13733.8ms TimeCoverageRelationStatistics Valid=5449, Invalid=67181, Unknown=0, NotChecked=0, Total=72630 [2021-06-01 20:57:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-06-01 20:57:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 6370. [2021-06-01 20:57:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 2.342282932956508) internal successors, (14918), 6369 states have internal predecessors, (14918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 14918 transitions. [2021-06-01 20:57:27,631 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 14918 transitions. Word has length 37 [2021-06-01 20:57:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:27,631 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 14918 transitions. [2021-06-01 20:57:27,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:57:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 14918 transitions. [2021-06-01 20:57:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:27,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:27,638 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:27,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:27,838 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash -134804883, now seen corresponding path program 133 times [2021-06-01 20:57:27,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:27,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951404359] [2021-06-01 20:57:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:28,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951404359] [2021-06-01 20:57:28,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951404359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906512007] [2021-06-01 20:57:28,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:28,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-01 20:57:28,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:28,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906512007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:28,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:28,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-01 20:57:28,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2182163] [2021-06-01 20:57:28,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:57:28,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:28,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:57:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:57:28,876 INFO L87 Difference]: Start difference. First operand 6370 states and 14918 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:31,353 INFO L93 Difference]: Finished difference Result 6909 states and 15987 transitions. [2021-06-01 20:57:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 20:57:31,353 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:57:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:31,360 INFO L225 Difference]: With dead ends: 6909 [2021-06-01 20:57:31,360 INFO L226 Difference]: Without dead ends: 6891 [2021-06-01 20:57:31,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 2310.5ms TimeCoverageRelationStatistics Valid=553, Invalid=5299, Unknown=0, NotChecked=0, Total=5852 [2021-06-01 20:57:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-06-01 20:57:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6452. [2021-06-01 20:57:31,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6451 states have (on average 2.3432026042474035) internal successors, (15116), 6451 states have internal predecessors, (15116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 15116 transitions. [2021-06-01 20:57:31,440 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 15116 transitions. Word has length 37 [2021-06-01 20:57:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:31,440 INFO L482 AbstractCegarLoop]: Abstraction has 6452 states and 15116 transitions. [2021-06-01 20:57:31,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 15116 transitions. [2021-06-01 20:57:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:31,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:31,447 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:31,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-06-01 20:57:31,647 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1908066299, now seen corresponding path program 134 times [2021-06-01 20:57:31,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:31,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999939163] [2021-06-01 20:57:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:31,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:31,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999939163] [2021-06-01 20:57:31,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999939163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:31,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950212559] [2021-06-01 20:57:31,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:31,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:57:31,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:57:31,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:57:31,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:32,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950212559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:32,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:32,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-01 20:57:32,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123741116] [2021-06-01 20:57:32,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-01 20:57:32,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:32,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-01 20:57:32,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 20:57:32,605 INFO L87 Difference]: Start difference. First operand 6452 states and 15116 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:36,713 INFO L93 Difference]: Finished difference Result 8689 states and 20145 transitions. [2021-06-01 20:57:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-01 20:57:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 [2021-06-01 20:57:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:36,722 INFO L225 Difference]: With dead ends: 8689 [2021-06-01 20:57:36,722 INFO L226 Difference]: Without dead ends: 8655 [2021-06-01 20:57:36,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 3829.2ms TimeCoverageRelationStatistics Valid=1429, Invalid=10781, Unknown=0, NotChecked=0, Total=12210 [2021-06-01 20:57:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-06-01 20:57:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 6530. [2021-06-01 20:57:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 6529 states have (on average 2.342165722162659) internal successors, (15292), 6529 states have internal predecessors, (15292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 15292 transitions. [2021-06-01 20:57:36,816 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 15292 transitions. Word has length 37 [2021-06-01 20:57:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:36,816 INFO L482 AbstractCegarLoop]: Abstraction has 6530 states and 15292 transitions. [2021-06-01 20:57:36,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 15292 transitions. [2021-06-01 20:57:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:36,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:36,823 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:37,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:37,025 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash -605365953, now seen corresponding path program 135 times [2021-06-01 20:57:37,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:37,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843854267] [2021-06-01 20:57:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:37,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:37,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843854267] [2021-06-01 20:57:37,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843854267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:37,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495630194] [2021-06-01 20:57:37,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:37,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-01 20:57:37,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:57:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:57:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:37,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495630194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:37,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:37,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-01 20:57:37,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084081581] [2021-06-01 20:57:37,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 20:57:37,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:37,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 20:57:37,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-01 20:57:37,765 INFO L87 Difference]: Start difference. First operand 6530 states and 15292 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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) [2021-06-01 20:57:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:41,929 INFO L93 Difference]: Finished difference Result 8866 states and 20480 transitions. [2021-06-01 20:57:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-01 20:57:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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 37 [2021-06-01 20:57:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:41,938 INFO L225 Difference]: With dead ends: 8866 [2021-06-01 20:57:41,938 INFO L226 Difference]: Without dead ends: 8800 [2021-06-01 20:57:41,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 3378.5ms TimeCoverageRelationStatistics Valid=1022, Invalid=10534, Unknown=0, NotChecked=0, Total=11556 [2021-06-01 20:57:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8800 states. [2021-06-01 20:57:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8800 to 6612. [2021-06-01 20:57:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.341249432763576) internal successors, (15478), 6611 states have internal predecessors, (15478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 15478 transitions. [2021-06-01 20:57:42,026 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 15478 transitions. Word has length 37 [2021-06-01 20:57:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:42,026 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 15478 transitions. [2021-06-01 20:57:42,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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) [2021-06-01 20:57:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 15478 transitions. [2021-06-01 20:57:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:42,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:42,032 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:42,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-06-01 20:57:42,233 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1064850861, now seen corresponding path program 136 times [2021-06-01 20:57:42,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:42,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122225312] [2021-06-01 20:57:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:42,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:42,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122225312] [2021-06-01 20:57:42,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122225312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:42,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896303518] [2021-06-01 20:57:42,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:42,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:57:42,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:57:42,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:57:42,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:57:42,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896303518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:42,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:42,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-01 20:57:42,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926169907] [2021-06-01 20:57:42,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 20:57:42,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 20:57:42,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-01 20:57:42,956 INFO L87 Difference]: Start difference. First operand 6612 states and 15478 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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) [2021-06-01 20:57:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:47,931 INFO L93 Difference]: Finished difference Result 10348 states and 23647 transitions. [2021-06-01 20:57:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-01 20:57:47,931 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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 37 [2021-06-01 20:57:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:47,941 INFO L225 Difference]: With dead ends: 10348 [2021-06-01 20:57:47,941 INFO L226 Difference]: Without dead ends: 10305 [2021-06-01 20:57:47,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 4138.3ms TimeCoverageRelationStatistics Valid=1422, Invalid=13830, Unknown=0, NotChecked=0, Total=15252 [2021-06-01 20:57:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10305 states. [2021-06-01 20:57:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10305 to 6781. [2021-06-01 20:57:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.344395280235988) internal successors, (15895), 6780 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 15895 transitions. [2021-06-01 20:57:48,040 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 15895 transitions. Word has length 37 [2021-06-01 20:57:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:48,040 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 15895 transitions. [2021-06-01 20:57:48,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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) [2021-06-01 20:57:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 15895 transitions. [2021-06-01 20:57:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:48,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:48,046 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:48,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2218,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:48,246 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash 535237559, now seen corresponding path program 137 times [2021-06-01 20:57:48,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:48,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464346332] [2021-06-01 20:57:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:48,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464346332] [2021-06-01 20:57:48,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464346332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525611095] [2021-06-01 20:57:48,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:48,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:57:48,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:57:48,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-01 20:57:48,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:49,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525611095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:49,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:49,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-06-01 20:57:49,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162093450] [2021-06-01 20:57:49,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-01 20:57:49,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:49,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-01 20:57:49,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-06-01 20:57:49,326 INFO L87 Difference]: Start difference. First operand 6781 states and 15895 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-06-01 20:57:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:51,760 INFO L93 Difference]: Finished difference Result 7588 states and 17601 transitions. [2021-06-01 20:57:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-01 20:57:51,760 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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 37 [2021-06-01 20:57:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:51,768 INFO L225 Difference]: With dead ends: 7588 [2021-06-01 20:57:51,768 INFO L226 Difference]: Without dead ends: 7588 [2021-06-01 20:57:51,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 2457.8ms TimeCoverageRelationStatistics Valid=839, Invalid=7171, Unknown=0, NotChecked=0, Total=8010 [2021-06-01 20:57:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-06-01 20:57:51,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 6907. [2021-06-01 20:57:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 2.347958297132928) internal successors, (16215), 6906 states have internal predecessors, (16215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:51,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 16215 transitions. [2021-06-01 20:57:51,848 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 16215 transitions. Word has length 37 [2021-06-01 20:57:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:51,848 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 16215 transitions. [2021-06-01 20:57:51,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-06-01 20:57:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 16215 transitions. [2021-06-01 20:57:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:51,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:51,855 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:52,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2228 [2021-06-01 20:57:52,057 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash 596039863, now seen corresponding path program 138 times [2021-06-01 20:57:52,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:52,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797150678] [2021-06-01 20:57:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:52,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:52,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797150678] [2021-06-01 20:57:52,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797150678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:52,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541911163] [2021-06-01 20:57:52,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:52,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 20:57:52,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:57:52,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:57:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:53,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541911163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:53,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:53,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-01 20:57:53,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324248329] [2021-06-01 20:57:53,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-01 20:57:53,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:53,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-01 20:57:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 20:57:53,001 INFO L87 Difference]: Start difference. First operand 6907 states and 16215 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:57:58,060 INFO L93 Difference]: Finished difference Result 9465 states and 21940 transitions. [2021-06-01 20:57:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-01 20:57:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 [2021-06-01 20:57:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:57:58,069 INFO L225 Difference]: With dead ends: 9465 [2021-06-01 20:57:58,069 INFO L226 Difference]: Without dead ends: 9404 [2021-06-01 20:57:58,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 4689.0ms TimeCoverageRelationStatistics Valid=1741, Invalid=13021, Unknown=0, NotChecked=0, Total=14762 [2021-06-01 20:57:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-06-01 20:57:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7012. [2021-06-01 20:57:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7012 states, 7011 states have (on average 2.3451718727713593) internal successors, (16442), 7011 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7012 states to 7012 states and 16442 transitions. [2021-06-01 20:57:58,160 INFO L78 Accepts]: Start accepts. Automaton has 7012 states and 16442 transitions. Word has length 37 [2021-06-01 20:57:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:57:58,160 INFO L482 AbstractCegarLoop]: Abstraction has 7012 states and 16442 transitions. [2021-06-01 20:57:58,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:57:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 7012 states and 16442 transitions. [2021-06-01 20:57:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:57:58,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:57:58,166 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:57:58,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2247 [2021-06-01 20:57:58,367 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:57:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:57:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1294610557, now seen corresponding path program 139 times [2021-06-01 20:57:58,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:57:58,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724413498] [2021-06-01 20:57:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:57:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:58,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:57:58,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724413498] [2021-06-01 20:57:58,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724413498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:58,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361917211] [2021-06-01 20:57:58,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:57:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:57:58,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-01 20:57:58,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:57:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:57:59,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361917211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:57:59,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:57:59,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-01 20:57:59,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214984843] [2021-06-01 20:57:59,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-01 20:57:59,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:57:59,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-01 20:57:59,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-01 20:57:59,361 INFO L87 Difference]: Start difference. First operand 7012 states and 16442 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-06-01 20:58:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:03,725 INFO L93 Difference]: Finished difference Result 12834 states and 29277 transitions. [2021-06-01 20:58:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-01 20:58:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 37 [2021-06-01 20:58:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:03,739 INFO L225 Difference]: With dead ends: 12834 [2021-06-01 20:58:03,739 INFO L226 Difference]: Without dead ends: 12677 [2021-06-01 20:58:03,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 4129.8ms TimeCoverageRelationStatistics Valid=2193, Invalid=14319, Unknown=0, NotChecked=0, Total=16512 [2021-06-01 20:58:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12677 states. [2021-06-01 20:58:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12677 to 7393. [2021-06-01 20:58:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7393 states, 7392 states have (on average 2.354707792207792) internal successors, (17406), 7392 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7393 states to 7393 states and 17406 transitions. [2021-06-01 20:58:03,862 INFO L78 Accepts]: Start accepts. Automaton has 7393 states and 17406 transitions. Word has length 37 [2021-06-01 20:58:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:03,862 INFO L482 AbstractCegarLoop]: Abstraction has 7393 states and 17406 transitions. [2021-06-01 20:58:03,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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) [2021-06-01 20:58:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7393 states and 17406 transitions. [2021-06-01 20:58:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:03,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:03,869 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:04,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-06-01 20:58:04,070 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash 889571579, now seen corresponding path program 140 times [2021-06-01 20:58:04,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:04,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326285816] [2021-06-01 20:58:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:58:04,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:04,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326285816] [2021-06-01 20:58:04,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326285816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:04,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30493708] [2021-06-01 20:58:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:04,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:58:04,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:04,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-01 20:58:04,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:05,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30493708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:05,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:05,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-01 20:58:05,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546721270] [2021-06-01 20:58:05,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-01 20:58:05,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:05,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-01 20:58:05,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-01 20:58:05,126 INFO L87 Difference]: Start difference. First operand 7393 states and 17406 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-06-01 20:58:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:08,946 INFO L93 Difference]: Finished difference Result 10016 states and 23322 transitions. [2021-06-01 20:58:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-01 20:58:08,946 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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 37 [2021-06-01 20:58:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:08,956 INFO L225 Difference]: With dead ends: 10016 [2021-06-01 20:58:08,956 INFO L226 Difference]: Without dead ends: 9961 [2021-06-01 20:58:08,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 3715.3ms TimeCoverageRelationStatistics Valid=960, Invalid=7050, Unknown=0, NotChecked=0, Total=8010 [2021-06-01 20:58:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-01 20:58:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7444. [2021-06-01 20:58:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 2.3526803708182187) internal successors, (17511), 7443 states have internal predecessors, (17511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 17511 transitions. [2021-06-01 20:58:09,050 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 17511 transitions. Word has length 37 [2021-06-01 20:58:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:09,050 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 17511 transitions. [2021-06-01 20:58:09,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 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) [2021-06-01 20:58:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 17511 transitions. [2021-06-01 20:58:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:09,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:09,056 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:09,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:09,257 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1449579259, now seen corresponding path program 141 times [2021-06-01 20:58:09,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:09,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752021307] [2021-06-01 20:58:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:09,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:09,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752021307] [2021-06-01 20:58:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752021307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:09,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158406486] [2021-06-01 20:58:09,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:09,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-01 20:58:09,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:58:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:09,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158406486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:09,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:09,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-06-01 20:58:09,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649295416] [2021-06-01 20:58:09,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:58:09,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:58:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:58:09,901 INFO L87 Difference]: Start difference. First operand 7444 states and 17511 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 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) [2021-06-01 20:58:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:12,911 INFO L93 Difference]: Finished difference Result 10247 states and 23785 transitions. [2021-06-01 20:58:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-01 20:58:12,911 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 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 37 [2021-06-01 20:58:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:12,921 INFO L225 Difference]: With dead ends: 10247 [2021-06-01 20:58:12,921 INFO L226 Difference]: Without dead ends: 10170 [2021-06-01 20:58:12,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 2665.6ms TimeCoverageRelationStatistics Valid=893, Invalid=6589, Unknown=0, NotChecked=0, Total=7482 [2021-06-01 20:58:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-01 20:58:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7464. [2021-06-01 20:58:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7464 states, 7463 states have (on average 2.352405198981643) internal successors, (17556), 7463 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 17556 transitions. [2021-06-01 20:58:13,021 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 17556 transitions. Word has length 37 [2021-06-01 20:58:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:13,022 INFO L482 AbstractCegarLoop]: Abstraction has 7464 states and 17556 transitions. [2021-06-01 20:58:13,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 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) [2021-06-01 20:58:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 17556 transitions. [2021-06-01 20:58:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:13,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:13,028 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:13,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2307 [2021-06-01 20:58:13,228 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 380397771, now seen corresponding path program 142 times [2021-06-01 20:58:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:13,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386874739] [2021-06-01 20:58:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:13,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386874739] [2021-06-01 20:58:13,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386874739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952846725] [2021-06-01 20:58:13,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:13,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:58:13,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:58:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:14,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952846725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:14,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:14,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-01 20:58:14,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883659918] [2021-06-01 20:58:14,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:58:14,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:14,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:58:14,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:58:14,121 INFO L87 Difference]: Start difference. First operand 7464 states and 17556 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:16,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:16,935 INFO L93 Difference]: Finished difference Result 11331 states and 26458 transitions. [2021-06-01 20:58:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-01 20:58:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:58:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:16,947 INFO L225 Difference]: With dead ends: 11331 [2021-06-01 20:58:16,947 INFO L226 Difference]: Without dead ends: 11256 [2021-06-01 20:58:16,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 2780.7ms TimeCoverageRelationStatistics Valid=1062, Invalid=6078, Unknown=0, NotChecked=0, Total=7140 [2021-06-01 20:58:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11256 states. [2021-06-01 20:58:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11256 to 8172. [2021-06-01 20:58:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 2.3583404724023986) internal successors, (19270), 8171 states have internal predecessors, (19270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 19270 transitions. [2021-06-01 20:58:17,058 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 19270 transitions. Word has length 37 [2021-06-01 20:58:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:17,058 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 19270 transitions. [2021-06-01 20:58:17,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 19270 transitions. [2021-06-01 20:58:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:17,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:17,065 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:17,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-06-01 20:58:17,266 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:17,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:17,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1713251961, now seen corresponding path program 143 times [2021-06-01 20:58:17,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:17,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448099963] [2021-06-01 20:58:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:17,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:17,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448099963] [2021-06-01 20:58:17,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448099963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:17,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163142992] [2021-06-01 20:58:17,577 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:17,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 20:58:17,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:58:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 20:58:18,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163142992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:18,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:18,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-01 20:58:18,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975141423] [2021-06-01 20:58:18,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-01 20:58:18,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-01 20:58:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-01 20:58:18,166 INFO L87 Difference]: Start difference. First operand 8172 states and 19270 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:22,904 INFO L93 Difference]: Finished difference Result 11271 states and 26216 transitions. [2021-06-01 20:58:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-01 20:58:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:58:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:22,915 INFO L225 Difference]: With dead ends: 11271 [2021-06-01 20:58:22,915 INFO L226 Difference]: Without dead ends: 11205 [2021-06-01 20:58:22,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 4477.2ms TimeCoverageRelationStatistics Valid=1180, Invalid=8326, Unknown=0, NotChecked=0, Total=9506 [2021-06-01 20:58:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-06-01 20:58:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 8408. [2021-06-01 20:58:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8408 states, 8407 states have (on average 2.3495896276912096) internal successors, (19753), 8407 states have internal predecessors, (19753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8408 states to 8408 states and 19753 transitions. [2021-06-01 20:58:23,032 INFO L78 Accepts]: Start accepts. Automaton has 8408 states and 19753 transitions. Word has length 37 [2021-06-01 20:58:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:23,032 INFO L482 AbstractCegarLoop]: Abstraction has 8408 states and 19753 transitions. [2021-06-01 20:58:23,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 8408 states and 19753 transitions. [2021-06-01 20:58:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:23,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:23,040 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:23,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:23,243 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash -787483265, now seen corresponding path program 144 times [2021-06-01 20:58:23,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:23,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243719374] [2021-06-01 20:58:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:23,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:23,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243719374] [2021-06-01 20:58:23,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243719374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:23,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728287168] [2021-06-01 20:58:23,562 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:23,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-01 20:58:23,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:23,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-01 20:58:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:24,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728287168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:24,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:24,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-01 20:58:24,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156132176] [2021-06-01 20:58:24,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:58:24,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:24,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:58:24,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:58:24,412 INFO L87 Difference]: Start difference. First operand 8408 states and 19753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:27,087 INFO L93 Difference]: Finished difference Result 9319 states and 21711 transitions. [2021-06-01 20:58:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 20:58:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 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 [2021-06-01 20:58:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:27,096 INFO L225 Difference]: With dead ends: 9319 [2021-06-01 20:58:27,096 INFO L226 Difference]: Without dead ends: 9265 [2021-06-01 20:58:27,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2576.6ms TimeCoverageRelationStatistics Valid=595, Invalid=6211, Unknown=0, NotChecked=0, Total=6806 [2021-06-01 20:58:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-06-01 20:58:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 8562. [2021-06-01 20:58:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8562 states, 8561 states have (on average 2.3510103959817776) internal successors, (20127), 8561 states have internal predecessors, (20127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8562 states to 8562 states and 20127 transitions. [2021-06-01 20:58:27,193 INFO L78 Accepts]: Start accepts. Automaton has 8562 states and 20127 transitions. Word has length 37 [2021-06-01 20:58:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:27,193 INFO L482 AbstractCegarLoop]: Abstraction has 8562 states and 20127 transitions. [2021-06-01 20:58:27,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 8562 states and 20127 transitions. [2021-06-01 20:58:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:27,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:27,201 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:27,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-06-01 20:58:27,401 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1338722055, now seen corresponding path program 145 times [2021-06-01 20:58:27,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:27,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207085953] [2021-06-01 20:58:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:27,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207085953] [2021-06-01 20:58:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207085953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472112201] [2021-06-01 20:58:27,713 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:27,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-01 20:58:27,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:28,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472112201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:28,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:28,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-01 20:58:28,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766672895] [2021-06-01 20:58:28,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:58:28,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:28,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:58:28,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:58:28,549 INFO L87 Difference]: Start difference. First operand 8562 states and 20127 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:58:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:34,900 INFO L93 Difference]: Finished difference Result 9415 states and 21837 transitions. [2021-06-01 20:58:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-01 20:58:34,900 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 37 [2021-06-01 20:58:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:34,910 INFO L225 Difference]: With dead ends: 9415 [2021-06-01 20:58:34,910 INFO L226 Difference]: Without dead ends: 9370 [2021-06-01 20:58:34,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 5698.8ms TimeCoverageRelationStatistics Valid=927, Invalid=15329, Unknown=0, NotChecked=0, Total=16256 [2021-06-01 20:58:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-06-01 20:58:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8678. [2021-06-01 20:58:35,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8678 states, 8677 states have (on average 2.355076639391495) internal successors, (20435), 8677 states have internal predecessors, (20435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8678 states to 8678 states and 20435 transitions. [2021-06-01 20:58:35,013 INFO L78 Accepts]: Start accepts. Automaton has 8678 states and 20435 transitions. Word has length 37 [2021-06-01 20:58:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:35,013 INFO L482 AbstractCegarLoop]: Abstraction has 8678 states and 20435 transitions. [2021-06-01 20:58:35,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:58:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8678 states and 20435 transitions. [2021-06-01 20:58:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:35,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:35,021 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:35,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:35,221 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2123820725, now seen corresponding path program 146 times [2021-06-01 20:58:35,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:35,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998369883] [2021-06-01 20:58:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:35,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:35,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998369883] [2021-06-01 20:58:35,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998369883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:35,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439240647] [2021-06-01 20:58:35,534 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:35,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:58:35,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-01 20:58:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:36,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439240647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:36,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:36,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-01 20:58:36,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667820319] [2021-06-01 20:58:36,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:58:36,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:58:36,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:58:36,216 INFO L87 Difference]: Start difference. First operand 8678 states and 20435 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:58:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:42,681 INFO L93 Difference]: Finished difference Result 9447 states and 21893 transitions. [2021-06-01 20:58:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-01 20:58:42,682 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 37 [2021-06-01 20:58:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:42,689 INFO L225 Difference]: With dead ends: 9447 [2021-06-01 20:58:42,689 INFO L226 Difference]: Without dead ends: 9429 [2021-06-01 20:58:42,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5584.3ms TimeCoverageRelationStatistics Valid=962, Invalid=14290, Unknown=0, NotChecked=0, Total=15252 [2021-06-01 20:58:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-06-01 20:58:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8687. [2021-06-01 20:58:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 2.354823854478471) internal successors, (20454), 8686 states have internal predecessors, (20454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 20454 transitions. [2021-06-01 20:58:42,786 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 20454 transitions. Word has length 37 [2021-06-01 20:58:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:42,787 INFO L482 AbstractCegarLoop]: Abstraction has 8687 states and 20454 transitions. [2021-06-01 20:58:42,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:58:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 20454 transitions. [2021-06-01 20:58:42,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:42,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:42,794 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:42,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2406 [2021-06-01 20:58:42,995 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2042403983, now seen corresponding path program 147 times [2021-06-01 20:58:42,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:42,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726272085] [2021-06-01 20:58:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:43,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:43,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726272085] [2021-06-01 20:58:43,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726272085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:43,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498807987] [2021-06-01 20:58:43,312 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:43,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-01 20:58:43,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-01 20:58:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498807987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:43,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:43,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-06-01 20:58:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917719931] [2021-06-01 20:58:43,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:58:43,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:43,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:58:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:58:43,739 INFO L87 Difference]: Start difference. First operand 8687 states and 20454 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:48,968 INFO L93 Difference]: Finished difference Result 10286 states and 23827 transitions. [2021-06-01 20:58:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-01 20:58:48,969 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-01 20:58:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:48,978 INFO L225 Difference]: With dead ends: 10286 [2021-06-01 20:58:48,979 INFO L226 Difference]: Without dead ends: 10163 [2021-06-01 20:58:48,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 4351.6ms TimeCoverageRelationStatistics Valid=1527, Invalid=14223, Unknown=0, NotChecked=0, Total=15750 [2021-06-01 20:58:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-06-01 20:58:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 8213. [2021-06-01 20:58:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 2.32501217730151) internal successors, (19093), 8212 states have internal predecessors, (19093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 19093 transitions. [2021-06-01 20:58:49,075 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 19093 transitions. Word has length 37 [2021-06-01 20:58:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:49,075 INFO L482 AbstractCegarLoop]: Abstraction has 8213 states and 19093 transitions. [2021-06-01 20:58:49,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 19093 transitions. [2021-06-01 20:58:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:49,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:49,082 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:49,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:49,282 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:49,282 INFO L82 PathProgramCache]: Analyzing trace with hash -726680961, now seen corresponding path program 148 times [2021-06-01 20:58:49,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:49,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060685374] [2021-06-01 20:58:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:49,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:49,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060685374] [2021-06-01 20:58:49,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060685374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:49,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90900932] [2021-06-01 20:58:49,596 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:49,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:58:49,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:49,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:58:49,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:50,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90900932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:50,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:50,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-01 20:58:50,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558861172] [2021-06-01 20:58:50,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-01 20:58:50,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-01 20:58:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 20:58:50,243 INFO L87 Difference]: Start difference. First operand 8213 states and 19093 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:53,291 INFO L93 Difference]: Finished difference Result 10792 states and 24889 transitions. [2021-06-01 20:58:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-01 20:58:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 [2021-06-01 20:58:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:53,303 INFO L225 Difference]: With dead ends: 10792 [2021-06-01 20:58:53,303 INFO L226 Difference]: Without dead ends: 10724 [2021-06-01 20:58:53,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 2876.1ms TimeCoverageRelationStatistics Valid=745, Invalid=7087, Unknown=0, NotChecked=0, Total=7832 [2021-06-01 20:58:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2021-06-01 20:58:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 8396. [2021-06-01 20:58:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 8395 states have (on average 2.321262656343061) internal successors, (19487), 8395 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 19487 transitions. [2021-06-01 20:58:53,413 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 19487 transitions. Word has length 37 [2021-06-01 20:58:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:53,413 INFO L482 AbstractCegarLoop]: Abstraction has 8396 states and 19487 transitions. [2021-06-01 20:58:53,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 19487 transitions. [2021-06-01 20:58:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:53,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:53,421 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:53,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2454 [2021-06-01 20:58:53,622 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1054854083, now seen corresponding path program 149 times [2021-06-01 20:58:53,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:53,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971187105] [2021-06-01 20:58:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:53,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:53,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971187105] [2021-06-01 20:58:53,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971187105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:53,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8496991] [2021-06-01 20:58:53,931 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:53,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-01 20:58:53,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:53,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:58:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:58:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:54,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8496991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:54,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:58:54,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-01 20:58:54,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486482819] [2021-06-01 20:58:54,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-01 20:58:54,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:58:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-01 20:58:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 20:58:54,633 INFO L87 Difference]: Start difference. First operand 8396 states and 19487 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:58:58,633 INFO L93 Difference]: Finished difference Result 11349 states and 26070 transitions. [2021-06-01 20:58:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-01 20:58:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 [2021-06-01 20:58:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:58:58,646 INFO L225 Difference]: With dead ends: 11349 [2021-06-01 20:58:58,646 INFO L226 Difference]: Without dead ends: 11303 [2021-06-01 20:58:58,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 3557.1ms TimeCoverageRelationStatistics Valid=959, Invalid=8547, Unknown=0, NotChecked=0, Total=9506 [2021-06-01 20:58:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11303 states. [2021-06-01 20:58:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11303 to 8676. [2021-06-01 20:58:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.31700288184438) internal successors, (20100), 8675 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20100 transitions. [2021-06-01 20:58:58,774 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20100 transitions. Word has length 37 [2021-06-01 20:58:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:58:58,774 INFO L482 AbstractCegarLoop]: Abstraction has 8676 states and 20100 transitions. [2021-06-01 20:58:58,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:58:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20100 transitions. [2021-06-01 20:58:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:58:58,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:58:58,782 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:58:58,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2477 [2021-06-01 20:58:58,983 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:58:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:58:58,983 INFO L82 PathProgramCache]: Analyzing trace with hash 766205447, now seen corresponding path program 150 times [2021-06-01 20:58:58,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:58:58,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105650363] [2021-06-01 20:58:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:58:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:58:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:58:59,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:58:59,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105650363] [2021-06-01 20:58:59,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105650363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:58:59,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366434088] [2021-06-01 20:58:59,252 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:58:59,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-01 20:58:59,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:58:59,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-01 20:58:59,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:00,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366434088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:00,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:00,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-01 20:59:00,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16407196] [2021-06-01 20:59:00,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-01 20:59:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-01 20:59:00,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-01 20:59:00,199 INFO L87 Difference]: Start difference. First operand 8676 states and 20100 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 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) [2021-06-01 20:59:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:05,853 INFO L93 Difference]: Finished difference Result 12806 states and 29266 transitions. [2021-06-01 20:59:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-01 20:59:05,853 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 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 37 [2021-06-01 20:59:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:05,867 INFO L225 Difference]: With dead ends: 12806 [2021-06-01 20:59:05,867 INFO L226 Difference]: Without dead ends: 12763 [2021-06-01 20:59:05,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5274 ImplicationChecksByTransitivity, 5495.8ms TimeCoverageRelationStatistics Valid=1929, Invalid=13323, Unknown=0, NotChecked=0, Total=15252 [2021-06-01 20:59:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-01 20:59:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 8944. [2021-06-01 20:59:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.3187968243318795) internal successors, (20737), 8943 states have internal predecessors, (20737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20737 transitions. [2021-06-01 20:59:06,000 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20737 transitions. Word has length 37 [2021-06-01 20:59:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:06,001 INFO L482 AbstractCegarLoop]: Abstraction has 8944 states and 20737 transitions. [2021-06-01 20:59:06,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 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) [2021-06-01 20:59:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20737 transitions. [2021-06-01 20:59:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:59:06,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:06,008 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:06,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2499 [2021-06-01 20:59:06,209 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:06,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:06,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1506799643, now seen corresponding path program 151 times [2021-06-01 20:59:06,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:06,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111724855] [2021-06-01 20:59:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:06,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111724855] [2021-06-01 20:59:06,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111724855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803865] [2021-06-01 20:59:06,507 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:59:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:07,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:07,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:07,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-01 20:59:07,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585563039] [2021-06-01 20:59:07,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-01 20:59:07,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:07,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-01 20:59:07,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-01 20:59:07,231 INFO L87 Difference]: Start difference. First operand 8944 states and 20737 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:12,643 INFO L93 Difference]: Finished difference Result 13828 states and 31463 transitions. [2021-06-01 20:59:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-01 20:59:12,644 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 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 [2021-06-01 20:59:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:12,659 INFO L225 Difference]: With dead ends: 13828 [2021-06-01 20:59:12,660 INFO L226 Difference]: Without dead ends: 13763 [2021-06-01 20:59:12,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5053 ImplicationChecksByTransitivity, 4736.7ms TimeCoverageRelationStatistics Valid=1672, Invalid=13828, Unknown=0, NotChecked=0, Total=15500 [2021-06-01 20:59:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2021-06-01 20:59:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 9228. [2021-06-01 20:59:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9228 states, 9227 states have (on average 2.318630107293812) internal successors, (21394), 9227 states have internal predecessors, (21394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9228 states to 9228 states and 21394 transitions. [2021-06-01 20:59:12,807 INFO L78 Accepts]: Start accepts. Automaton has 9228 states and 21394 transitions. Word has length 37 [2021-06-01 20:59:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:12,807 INFO L482 AbstractCegarLoop]: Abstraction has 9228 states and 21394 transitions. [2021-06-01 20:59:12,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 9228 states and 21394 transitions. [2021-06-01 20:59:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:59:12,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:12,816 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:13,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2517 [2021-06-01 20:59:13,016 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2038707397, now seen corresponding path program 152 times [2021-06-01 20:59:13,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:13,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046023173] [2021-06-01 20:59:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:13,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:13,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046023173] [2021-06-01 20:59:13,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046023173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:13,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676637204] [2021-06-01 20:59:13,280 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:13,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:59:13,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:13,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-01 20:59:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:14,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676637204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:14,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:14,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-01 20:59:14,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046713788] [2021-06-01 20:59:14,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:59:14,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:59:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:59:14,068 INFO L87 Difference]: Start difference. First operand 9228 states and 21394 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:59:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:17,216 INFO L93 Difference]: Finished difference Result 12038 states and 27683 transitions. [2021-06-01 20:59:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-01 20:59:17,216 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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 37 [2021-06-01 20:59:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:17,228 INFO L225 Difference]: With dead ends: 12038 [2021-06-01 20:59:17,228 INFO L226 Difference]: Without dead ends: 11974 [2021-06-01 20:59:17,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 3176.5ms TimeCoverageRelationStatistics Valid=891, Invalid=8421, Unknown=0, NotChecked=0, Total=9312 [2021-06-01 20:59:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11974 states. [2021-06-01 20:59:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11974 to 9402. [2021-06-01 20:59:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9402 states, 9401 states have (on average 2.3177321561536006) internal successors, (21789), 9401 states have internal predecessors, (21789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9402 states to 9402 states and 21789 transitions. [2021-06-01 20:59:17,343 INFO L78 Accepts]: Start accepts. Automaton has 9402 states and 21789 transitions. Word has length 37 [2021-06-01 20:59:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:17,343 INFO L482 AbstractCegarLoop]: Abstraction has 9402 states and 21789 transitions. [2021-06-01 20:59:17,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 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) [2021-06-01 20:59:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9402 states and 21789 transitions. [2021-06-01 20:59:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:59:17,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:17,351 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:17,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:17,551 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:17,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1185168001, now seen corresponding path program 153 times [2021-06-01 20:59:17,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:17,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280373867] [2021-06-01 20:59:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:17,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:17,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280373867] [2021-06-01 20:59:17,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280373867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:17,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084607733] [2021-06-01 20:59:17,895 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:17,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-01 20:59:17,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:59:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:18,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084607733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:18,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:18,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-06-01 20:59:18,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070637074] [2021-06-01 20:59:18,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-01 20:59:18,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-01 20:59:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-01 20:59:18,264 INFO L87 Difference]: Start difference. First operand 9402 states and 21789 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 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) [2021-06-01 20:59:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:21,220 INFO L93 Difference]: Finished difference Result 13606 states and 31169 transitions. [2021-06-01 20:59:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-01 20:59:21,221 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 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 37 [2021-06-01 20:59:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:21,235 INFO L225 Difference]: With dead ends: 13606 [2021-06-01 20:59:21,235 INFO L226 Difference]: Without dead ends: 13480 [2021-06-01 20:59:21,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 2685.1ms TimeCoverageRelationStatistics Valid=981, Invalid=5991, Unknown=0, NotChecked=0, Total=6972 [2021-06-01 20:59:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13480 states. [2021-06-01 20:59:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13480 to 9857. [2021-06-01 20:59:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9857 states, 9856 states have (on average 2.3118912337662336) internal successors, (22786), 9856 states have internal predecessors, (22786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 22786 transitions. [2021-06-01 20:59:21,372 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 22786 transitions. Word has length 37 [2021-06-01 20:59:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:21,372 INFO L482 AbstractCegarLoop]: Abstraction has 9857 states and 22786 transitions. [2021-06-01 20:59:21,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 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) [2021-06-01 20:59:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 22786 transitions. [2021-06-01 20:59:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:59:21,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:21,380 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:21,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2555,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:21,581 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1157338053, now seen corresponding path program 154 times [2021-06-01 20:59:21,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:21,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444323997] [2021-06-01 20:59:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:21,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:21,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444323997] [2021-06-01 20:59:21,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444323997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:21,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788030809] [2021-06-01 20:59:21,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:21,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:59:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-01 20:59:21,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:22,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788030809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:22,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:22,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-01 20:59:22,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281881577] [2021-06-01 20:59:22,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-01 20:59:22,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-01 20:59:22,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-01 20:59:22,673 INFO L87 Difference]: Start difference. First operand 9857 states and 22786 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:59:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:28,451 INFO L93 Difference]: Finished difference Result 14288 states and 32546 transitions. [2021-06-01 20:59:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-01 20:59:28,451 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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 37 [2021-06-01 20:59:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:28,468 INFO L225 Difference]: With dead ends: 14288 [2021-06-01 20:59:28,468 INFO L226 Difference]: Without dead ends: 14228 [2021-06-01 20:59:28,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 5097.6ms TimeCoverageRelationStatistics Valid=1717, Invalid=13289, Unknown=0, NotChecked=0, Total=15006 [2021-06-01 20:59:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14228 states. [2021-06-01 20:59:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14228 to 10307. [2021-06-01 20:59:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10307 states, 10306 states have (on average 2.3123423248593054) internal successors, (23831), 10306 states have internal predecessors, (23831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10307 states to 10307 states and 23831 transitions. [2021-06-01 20:59:28,662 INFO L78 Accepts]: Start accepts. Automaton has 10307 states and 23831 transitions. Word has length 37 [2021-06-01 20:59:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:28,662 INFO L482 AbstractCegarLoop]: Abstraction has 10307 states and 23831 transitions. [2021-06-01 20:59:28,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 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) [2021-06-01 20:59:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10307 states and 23831 transitions. [2021-06-01 20:59:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-01 20:59:28,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:28,670 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:28,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-01 20:59:28,871 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:28,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1911324613, now seen corresponding path program 155 times [2021-06-01 20:59:28,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:28,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728095831] [2021-06-01 20:59:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:29,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728095831] [2021-06-01 20:59:29,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728095831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:29,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619104754] [2021-06-01 20:59:29,140 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:29,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-01 20:59:29,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:29,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-01 20:59:29,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:29,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619104754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:29,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:29,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-01 20:59:29,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868656705] [2021-06-01 20:59:29,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-01 20:59:29,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:29,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-01 20:59:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-01 20:59:29,549 INFO L87 Difference]: Start difference. First operand 10307 states and 23831 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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) [2021-06-01 20:59:32,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:32,561 INFO L93 Difference]: Finished difference Result 14681 states and 33701 transitions. [2021-06-01 20:59:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-01 20:59:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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 37 [2021-06-01 20:59:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:32,577 INFO L225 Difference]: With dead ends: 14681 [2021-06-01 20:59:32,577 INFO L226 Difference]: Without dead ends: 14530 [2021-06-01 20:59:32,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2574.2ms TimeCoverageRelationStatistics Valid=1147, Invalid=6685, Unknown=0, NotChecked=0, Total=7832 [2021-06-01 20:59:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14530 states. [2021-06-01 20:59:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14530 to 10928. [2021-06-01 20:59:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10928 states, 10927 states have (on average 2.315914706689851) internal successors, (25306), 10927 states have internal predecessors, (25306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10928 states to 10928 states and 25306 transitions. [2021-06-01 20:59:32,728 INFO L78 Accepts]: Start accepts. Automaton has 10928 states and 25306 transitions. Word has length 37 [2021-06-01 20:59:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:32,728 INFO L482 AbstractCegarLoop]: Abstraction has 10928 states and 25306 transitions. [2021-06-01 20:59:32,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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) [2021-06-01 20:59:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10928 states and 25306 transitions. [2021-06-01 20:59:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 20:59:32,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:32,738 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:32,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-06-01 20:59:32,939 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 855717531, now seen corresponding path program 156 times [2021-06-01 20:59:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:32,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172793652] [2021-06-01 20:59:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:33,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:33,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172793652] [2021-06-01 20:59:33,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172793652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:33,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063212747] [2021-06-01 20:59:33,166 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:33,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-01 20:59:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:33,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:59:33,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:33,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063212747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:33,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:33,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-01 20:59:33,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623397098] [2021-06-01 20:59:33,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:59:33,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:59:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:59:33,787 INFO L87 Difference]: Start difference. First operand 10928 states and 25306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:35,898 INFO L93 Difference]: Finished difference Result 14325 states and 32936 transitions. [2021-06-01 20:59:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-01 20:59:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 20:59:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:35,913 INFO L225 Difference]: With dead ends: 14325 [2021-06-01 20:59:35,913 INFO L226 Difference]: Without dead ends: 14232 [2021-06-01 20:59:35,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 1936.0ms TimeCoverageRelationStatistics Valid=872, Invalid=5448, Unknown=0, NotChecked=0, Total=6320 [2021-06-01 20:59:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2021-06-01 20:59:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 11014. [2021-06-01 20:59:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 2.315990193407791) internal successors, (25506), 11013 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 25506 transitions. [2021-06-01 20:59:36,056 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 25506 transitions. Word has length 39 [2021-06-01 20:59:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:36,056 INFO L482 AbstractCegarLoop]: Abstraction has 11014 states and 25506 transitions. [2021-06-01 20:59:36,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 25506 transitions. [2021-06-01 20:59:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 20:59:36,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:36,066 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:36,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:36,266 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash 367286253, now seen corresponding path program 157 times [2021-06-01 20:59:36,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:36,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109605557] [2021-06-01 20:59:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:36,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:36,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109605557] [2021-06-01 20:59:36,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109605557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:36,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109649011] [2021-06-01 20:59:36,515 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:59:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:37,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109649011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:37,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:37,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-01 20:59:37,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387174126] [2021-06-01 20:59:37,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:59:37,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:59:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:59:37,222 INFO L87 Difference]: Start difference. First operand 11014 states and 25506 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:39,282 INFO L93 Difference]: Finished difference Result 14246 states and 32789 transitions. [2021-06-01 20:59:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-01 20:59:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 20:59:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:39,297 INFO L225 Difference]: With dead ends: 14246 [2021-06-01 20:59:39,298 INFO L226 Difference]: Without dead ends: 14165 [2021-06-01 20:59:39,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1904.4ms TimeCoverageRelationStatistics Valid=732, Invalid=4818, Unknown=0, NotChecked=0, Total=5550 [2021-06-01 20:59:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14165 states. [2021-06-01 20:59:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14165 to 11038. [2021-06-01 20:59:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 11037 states have (on average 2.315484280148591) internal successors, (25556), 11037 states have internal predecessors, (25556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 25556 transitions. [2021-06-01 20:59:39,452 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 25556 transitions. Word has length 39 [2021-06-01 20:59:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:39,452 INFO L482 AbstractCegarLoop]: Abstraction has 11038 states and 25556 transitions. [2021-06-01 20:59:39,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 25556 transitions. [2021-06-01 20:59:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 20:59:39,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:39,462 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:39,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2615,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:39,662 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2065380333, now seen corresponding path program 158 times [2021-06-01 20:59:39,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:39,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537675632] [2021-06-01 20:59:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:39,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:39,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537675632] [2021-06-01 20:59:39,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537675632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:39,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335643183] [2021-06-01 20:59:39,901 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:39,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 20:59:39,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:59:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:40,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335643183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:40,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:40,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-01 20:59:40,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704006481] [2021-06-01 20:59:40,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:59:40,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:40,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:59:40,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:59:40,546 INFO L87 Difference]: Start difference. First operand 11038 states and 25556 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:43,493 INFO L93 Difference]: Finished difference Result 14589 states and 33530 transitions. [2021-06-01 20:59:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-01 20:59:43,494 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 20:59:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:43,509 INFO L225 Difference]: With dead ends: 14589 [2021-06-01 20:59:43,509 INFO L226 Difference]: Without dead ends: 14547 [2021-06-01 20:59:43,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 2691.6ms TimeCoverageRelationStatistics Valid=1213, Invalid=6797, Unknown=0, NotChecked=0, Total=8010 [2021-06-01 20:59:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14547 states. [2021-06-01 20:59:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14547 to 11114. [2021-06-01 20:59:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11113 states have (on average 2.315666336722757) internal successors, (25734), 11113 states have internal predecessors, (25734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 25734 transitions. [2021-06-01 20:59:43,664 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 25734 transitions. Word has length 39 [2021-06-01 20:59:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:43,664 INFO L482 AbstractCegarLoop]: Abstraction has 11114 states and 25734 transitions. [2021-06-01 20:59:43,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 25734 transitions. [2021-06-01 20:59:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 20:59:43,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:43,674 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:43,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2637 [2021-06-01 20:59:43,883 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:43,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1136965671, now seen corresponding path program 159 times [2021-06-01 20:59:43,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:43,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558808437] [2021-06-01 20:59:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:44,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558808437] [2021-06-01 20:59:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558808437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738800556] [2021-06-01 20:59:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:44,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-01 20:59:44,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:44,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:59:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:44,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738800556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:44,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:44,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-01 20:59:44,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851458344] [2021-06-01 20:59:44,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:59:44,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:44,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:59:44,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:59:44,876 INFO L87 Difference]: Start difference. First operand 11114 states and 25734 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:47,382 INFO L93 Difference]: Finished difference Result 14390 states and 33112 transitions. [2021-06-01 20:59:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-01 20:59:47,383 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 20:59:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:47,397 INFO L225 Difference]: With dead ends: 14390 [2021-06-01 20:59:47,397 INFO L226 Difference]: Without dead ends: 14297 [2021-06-01 20:59:47,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2327.9ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-06-01 20:59:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-06-01 20:59:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 11118. [2021-06-01 20:59:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11118 states, 11117 states have (on average 2.3155527570387693) internal successors, (25742), 11117 states have internal predecessors, (25742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11118 states to 11118 states and 25742 transitions. [2021-06-01 20:59:47,572 INFO L78 Accepts]: Start accepts. Automaton has 11118 states and 25742 transitions. Word has length 39 [2021-06-01 20:59:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:47,572 INFO L482 AbstractCegarLoop]: Abstraction has 11118 states and 25742 transitions. [2021-06-01 20:59:47,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11118 states and 25742 transitions. [2021-06-01 20:59:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 20:59:47,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:47,583 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:47,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2660,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:47,783 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1459907545, now seen corresponding path program 160 times [2021-06-01 20:59:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:47,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085398732] [2021-06-01 20:59:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:48,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:48,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085398732] [2021-06-01 20:59:48,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085398732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:48,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641470865] [2021-06-01 20:59:48,023 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:48,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 20:59:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:59:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:48,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641470865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:48,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:48,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-01 20:59:48,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842144968] [2021-06-01 20:59:48,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:59:48,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:48,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:59:48,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:59:48,714 INFO L87 Difference]: Start difference. First operand 11118 states and 25742 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:52,036 INFO L93 Difference]: Finished difference Result 14835 states and 34081 transitions. [2021-06-01 20:59:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-01 20:59:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 20:59:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:52,052 INFO L225 Difference]: With dead ends: 14835 [2021-06-01 20:59:52,052 INFO L226 Difference]: Without dead ends: 14793 [2021-06-01 20:59:52,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 3081.2ms TimeCoverageRelationStatistics Valid=1393, Invalid=7349, Unknown=0, NotChecked=0, Total=8742 [2021-06-01 20:59:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14793 states. [2021-06-01 20:59:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14793 to 11122. [2021-06-01 20:59:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11122 states, 11121 states have (on average 2.315439259059437) internal successors, (25750), 11121 states have internal predecessors, (25750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11122 states to 11122 states and 25750 transitions. [2021-06-01 20:59:52,210 INFO L78 Accepts]: Start accepts. Automaton has 11122 states and 25750 transitions. Word has length 39 [2021-06-01 20:59:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:52,210 INFO L482 AbstractCegarLoop]: Abstraction has 11122 states and 25750 transitions. [2021-06-01 20:59:52,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 11122 states and 25750 transitions. [2021-06-01 20:59:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 20:59:52,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:52,220 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:52,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2684 [2021-06-01 20:59:52,427 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:52,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1198285931, now seen corresponding path program 161 times [2021-06-01 20:59:52,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:52,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722029231] [2021-06-01 20:59:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:52,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:52,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722029231] [2021-06-01 20:59:52,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722029231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:52,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410556094] [2021-06-01 20:59:52,666 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:52,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-01 20:59:52,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:52,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:59:52,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:53,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410556094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:53,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:53,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-01 20:59:53,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708603078] [2021-06-01 20:59:53,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:59:53,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:59:53,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:59:53,436 INFO L87 Difference]: Start difference. First operand 11122 states and 25750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 20:59:57,631 INFO L93 Difference]: Finished difference Result 15432 states and 35365 transitions. [2021-06-01 20:59:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-01 20:59:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 20:59:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 20:59:57,647 INFO L225 Difference]: With dead ends: 15432 [2021-06-01 20:59:57,647 INFO L226 Difference]: Without dead ends: 15390 [2021-06-01 20:59:57,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 3899.5ms TimeCoverageRelationStatistics Valid=1894, Invalid=10762, Unknown=0, NotChecked=0, Total=12656 [2021-06-01 20:59:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2021-06-01 20:59:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 11226. [2021-06-01 20:59:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11226 states, 11225 states have (on average 2.31554565701559) internal successors, (25992), 11225 states have internal predecessors, (25992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11226 states to 11226 states and 25992 transitions. [2021-06-01 20:59:57,800 INFO L78 Accepts]: Start accepts. Automaton has 11226 states and 25992 transitions. Word has length 39 [2021-06-01 20:59:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 20:59:57,800 INFO L482 AbstractCegarLoop]: Abstraction has 11226 states and 25992 transitions. [2021-06-01 20:59:57,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 20:59:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11226 states and 25992 transitions. [2021-06-01 20:59:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 20:59:57,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 20:59:57,810 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 20:59:58,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2705,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:58,011 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 20:59:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 20:59:58,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1315146321, now seen corresponding path program 162 times [2021-06-01 20:59:58,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 20:59:58,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524464076] [2021-06-01 20:59:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 20:59:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 20:59:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:58,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 20:59:58,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524464076] [2021-06-01 20:59:58,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524464076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:58,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823540623] [2021-06-01 20:59:58,237 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 20:59:58,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-01 20:59:58,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 20:59:58,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 20:59:58,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 20:59:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 20:59:59,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823540623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 20:59:59,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 20:59:59,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-01 20:59:59,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806711421] [2021-06-01 20:59:59,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 20:59:59,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 20:59:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 20:59:59,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 20:59:59,007 INFO L87 Difference]: Start difference. First operand 11226 states and 25992 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 21:00:01,084 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-06-01 21:00:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 21:00:03,994 INFO L93 Difference]: Finished difference Result 15857 states and 36251 transitions. [2021-06-01 21:00:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-01 21:00:03,995 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 21:00:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 21:00:04,012 INFO L225 Difference]: With dead ends: 15857 [2021-06-01 21:00:04,012 INFO L226 Difference]: Without dead ends: 15815 [2021-06-01 21:00:04,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 4476.5ms TimeCoverageRelationStatistics Valid=2226, Invalid=13274, Unknown=0, NotChecked=0, Total=15500 [2021-06-01 21:00:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-06-01 21:00:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 11354. [2021-06-01 21:00:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11354 states, 11353 states have (on average 2.3170968026072405) internal successors, (26306), 11353 states have internal predecessors, (26306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 21:00:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11354 states to 11354 states and 26306 transitions. [2021-06-01 21:00:04,179 INFO L78 Accepts]: Start accepts. Automaton has 11354 states and 26306 transitions. Word has length 39 [2021-06-01 21:00:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 21:00:04,179 INFO L482 AbstractCegarLoop]: Abstraction has 11354 states and 26306 transitions. [2021-06-01 21:00:04,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 21:00:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11354 states and 26306 transitions. [2021-06-01 21:00:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 21:00:04,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 21:00:04,189 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 21:00:04,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-06-01 21:00:04,390 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 21:00:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 21:00:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1603794957, now seen corresponding path program 163 times [2021-06-01 21:00:04,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 21:00:04,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710576610] [2021-06-01 21:00:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 21:00:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 21:00:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 21:00:04,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 21:00:04,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710576610] [2021-06-01 21:00:04,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710576610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 21:00:04,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173690645] [2021-06-01 21:00:04,692 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 21:00:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 21:00:04,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 21:00:04,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 21:00:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 21:00:05,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173690645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 21:00:05,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 21:00:05,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-01 21:00:05,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475256913] [2021-06-01 21:00:05,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-01 21:00:05,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 21:00:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-01 21:00:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-06-01 21:00:05,434 INFO L87 Difference]: Start difference. First operand 11354 states and 26306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 21:00:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 21:00:11,120 INFO L93 Difference]: Finished difference Result 16704 states and 38033 transitions. [2021-06-01 21:00:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-01 21:00:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-01 21:00:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 21:00:11,138 INFO L225 Difference]: With dead ends: 16704 [2021-06-01 21:00:11,138 INFO L226 Difference]: Without dead ends: 16655 [2021-06-01 21:00:11,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6247 ImplicationChecksByTransitivity, 5080.7ms TimeCoverageRelationStatistics Valid=2587, Invalid=15235, Unknown=0, NotChecked=0, Total=17822 [2021-06-01 21:00:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16655 states. [2021-06-01 21:00:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16655 to 11527. [2021-06-01 21:00:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11527 states, 11526 states have (on average 2.318931112267916) internal successors, (26728), 11526 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 21:00:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11527 states to 11527 states and 26728 transitions. [2021-06-01 21:00:11,316 INFO L78 Accepts]: Start accepts. Automaton has 11527 states and 26728 transitions. Word has length 39 [2021-06-01 21:00:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 21:00:11,317 INFO L482 AbstractCegarLoop]: Abstraction has 11527 states and 26728 transitions. [2021-06-01 21:00:11,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 21:00:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 11527 states and 26728 transitions. [2021-06-01 21:00:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-01 21:00:11,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 21:00:11,328 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 21:00:11,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-06-01 21:00:11,528 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 21:00:11,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 21:00:11,529 INFO L82 PathProgramCache]: Analyzing trace with hash -692364489, now seen corresponding path program 164 times [2021-06-01 21:00:11,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 21:00:11,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125774282] [2021-06-01 21:00:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 21:00:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 21:00:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 21:00:11,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 21:00:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125774282] [2021-06-01 21:00:11,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125774282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 21:00:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668724305] [2021-06-01 21:00:11,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 21:00:11,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 21:00:11,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 21:00:11,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-01 21:00:11,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-01 21:02:48,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-06-01 21:02:48,004 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-01 21:02:48,005 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-01 21:02:48,007 WARN L196 ceAbstractionStarter]: Timeout [2021-06-01 21:02:48,007 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.06 09:02:48 BasicIcfg [2021-06-01 21:02:48,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-01 21:02:48,007 INFO L168 Benchmark]: Toolchain (without parser) took 802664.12 ms. Allocated memory was 329.3 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 308.7 MB in the beginning and 1.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-06-01 21:02:48,007 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 329.3 MB. Free memory was 309.8 MB in the beginning and 309.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 21:02:48,007 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.47 ms. Allocated memory is still 329.3 MB. Free memory was 308.6 MB in the beginning and 307.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 21:02:48,008 INFO L168 Benchmark]: Boogie Preprocessor took 13.60 ms. Allocated memory is still 329.3 MB. Free memory was 307.1 MB in the beginning and 306.2 MB in the end (delta: 961.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-01 21:02:48,008 INFO L168 Benchmark]: RCFGBuilder took 261.39 ms. Allocated memory is still 329.3 MB. Free memory was 306.2 MB in the beginning and 294.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-01 21:02:48,008 INFO L168 Benchmark]: TraceAbstraction took 802365.26 ms. Allocated memory was 329.3 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 294.2 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. [2021-06-01 21:02:48,008 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 329.3 MB. Free memory was 309.8 MB in the beginning and 309.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.47 ms. Allocated memory is still 329.3 MB. Free memory was 308.6 MB in the beginning and 307.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.60 ms. Allocated memory is still 329.3 MB. Free memory was 307.1 MB in the beginning and 306.2 MB in the end (delta: 961.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 261.39 ms. Allocated memory is still 329.3 MB. Free memory was 306.2 MB in the beginning and 294.7 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 802365.26 ms. Allocated memory was 329.3 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 294.2 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - 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: 802279.7ms, OverallIterations: 166, TraceHistogramMax: 6, EmptinessCheckTime: 593.0ms, AutomataDifference: 479030.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6393 SDtfs, 47769 SDslu, 100866 SDs, 0 SdLazy, 260600 SolverSat, 16320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 99509.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17246 GetRequests, 3255 SyntacticMatches, 191 SemanticMatches, 13800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454627 ImplicationChecksByTransitivity, 445315.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11527occurred in iteration=165, InterpolantAutomatonStates: 10321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8144.2ms AutomataMinimizationTime, 165 MinimizatonAttempts, 212945 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 478.0ms SsaConstructionTime, 2065.3ms SatisfiabilityAnalysisTime, 118904.6ms InterpolantComputationTime, 11094 NumberOfCodeBlocks, 11094 NumberOfCodeBlocksAsserted, 771 NumberOfCheckSat, 10766 ConstructedInterpolants, 0 QuantifiedInterpolants, 179406 SizeOfPredicates, 718 NumberOfNonLiveVariables, 12442 ConjunctsInSsa, 5374 ConjunctsInUnsatCore, 328 InterpolantComputations, 2 PerfectInterpolantSequences, 505/15371 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