/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/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:43:42,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:43:42,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:43:42,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:43:42,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:43:42,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:43:42,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:43:42,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:43:42,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:43:42,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:43:42,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:43:42,174 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:43:42,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:43:42,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:43:42,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:43:42,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:43:42,176 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:43:42,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:43:42,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:43:42,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:43:42,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:43:42,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:43:42,437 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:43:42,438 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:43:42,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-06-05 22:43:42,438 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-06-05 22:43:42,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:43:42,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:43:42,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:43:42,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:43:42,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:43:42,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:43:42,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:43:42,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:43:42,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:43:42,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... [2021-06-05 22:43:42,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:43:42,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:43:42,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:43:42,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:43:42,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:43:42,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:43:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:43:42,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:43:42,567 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:43:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:43:42,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:43:42,567 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:43:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:43:42,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:43:42,567 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:43:42,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:43:42,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:43:42,568 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 22:43:42,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 22:43:42,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 22:43:42,568 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:43:42,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:43:42,707 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:43:42,708 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:43:42 BoogieIcfgContainer [2021-06-05 22:43:42,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:43:42,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:43:42,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:43:42,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:43:42,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:43:42" (1/2) ... [2021-06-05 22:43:42,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60916a15 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:43:42, skipping insertion in model container [2021-06-05 22:43:42,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:43:42" (2/2) ... [2021-06-05 22:43:42,713 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-06-05 22:43:42,717 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:43:42,717 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:43:42,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:43:42,718 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:43:42,753 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 22:43:42,765 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 22:43:42,776 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:43:42,780 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:43:42,780 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:43:42,781 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:43:42,781 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:43:42,781 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:43:42,781 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:43:42,781 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:43:42,787 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-06-05 22:43:42,858 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:43:42,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:42,879 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:42,879 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:42,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1357321038, now seen corresponding path program 1 times [2021-06-05 22:43:42,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:42,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538029298] [2021-06-05 22:43:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:43,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:43,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538029298] [2021-06-05 22:43:43,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538029298] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:43,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:43:43,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:43:43,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460727019] [2021-06-05 22:43:43,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:43:43,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:43,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:43:43,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:43:43,068 INFO L87 Difference]: Start difference. First operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 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 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:43,153 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-06-05 22:43:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:43:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:43:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:43,173 INFO L225 Difference]: With dead ends: 1267 [2021-06-05 22:43:43,173 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 22:43:43,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:43:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 22:43:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-06-05 22:43:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-06-05 22:43:43,241 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-06-05 22:43:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:43,242 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-06-05 22:43:43,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-06-05 22:43:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:43:43,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:43,246 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:43,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:43:43,246 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:43,251 INFO L82 PathProgramCache]: Analyzing trace with hash -219840432, now seen corresponding path program 1 times [2021-06-05 22:43:43,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:43,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643824269] [2021-06-05 22:43:43,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:43,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:43,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643824269] [2021-06-05 22:43:43,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643824269] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:43,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:43:43,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:43:43,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052964046] [2021-06-05 22:43:43,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:43:43,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:43:43,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:43:43,316 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:43,405 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-06-05 22:43:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:43:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 22:43:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:43,413 INFO L225 Difference]: With dead ends: 1405 [2021-06-05 22:43:43,413 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 22:43:43,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:43:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 22:43:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-06-05 22:43:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-06-05 22:43:43,443 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-06-05 22:43:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:43,443 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-06-05 22:43:43,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-06-05 22:43:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:43:43,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:43,446 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:43,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:43:43,447 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:43,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1181437776, now seen corresponding path program 1 times [2021-06-05 22:43:43,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:43,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032847370] [2021-06-05 22:43:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:43,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:43,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032847370] [2021-06-05 22:43:43,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032847370] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:43,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:43:43,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:43:43,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231576760] [2021-06-05 22:43:43,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:43:43,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:43,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:43:43,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:43:43,514 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:43,613 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2021-06-05 22:43:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:43:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 22:43:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:43,622 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 22:43:43,622 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 22:43:43,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:43:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 22:43:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2021-06-05 22:43:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2021-06-05 22:43:43,652 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2021-06-05 22:43:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:43,653 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2021-06-05 22:43:43,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2021-06-05 22:43:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:43:43,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:43,655 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:43,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:43:43,656 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1293793296, now seen corresponding path program 2 times [2021-06-05 22:43:43,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:43,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554854661] [2021-06-05 22:43:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:43,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:43,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554854661] [2021-06-05 22:43:43,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554854661] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:43,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:43:43,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:43:43,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329183626] [2021-06-05 22:43:43,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:43:43,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:43,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:43:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:43:43,718 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:43,774 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2021-06-05 22:43:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:43:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 22:43:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:43,779 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 22:43:43,780 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 22:43:43,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:43:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 22:43:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2021-06-05 22:43:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2021-06-05 22:43:43,805 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2021-06-05 22:43:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:43,806 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2021-06-05 22:43:43,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2021-06-05 22:43:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:43:43,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:43,808 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:43,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:43:43,809 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2011026324, now seen corresponding path program 2 times [2021-06-05 22:43:43,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:43,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404042199] [2021-06-05 22:43:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:43,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:43,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404042199] [2021-06-05 22:43:43,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404042199] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:43,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:43:43,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:43:43,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590744544] [2021-06-05 22:43:43,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:43:43,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:43,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:43:43,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:43:43,861 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:43,911 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2021-06-05 22:43:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:43:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 22:43:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:43,918 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 22:43:43,918 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 22:43:43,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:43:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 22:43:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2021-06-05 22:43:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-06-05 22:43:43,952 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-06-05 22:43:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:43,952 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-06-05 22:43:43,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-06-05 22:43:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:43:43,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:43,954 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:43,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:43:43,954 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:43,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:43,955 INFO L82 PathProgramCache]: Analyzing trace with hash 30382996, now seen corresponding path program 3 times [2021-06-05 22:43:43,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:43,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072660335] [2021-06-05 22:43:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:43,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:43,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072660335] [2021-06-05 22:43:43,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072660335] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:43,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:43:43,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:43:43,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032988593] [2021-06-05 22:43:43,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:43:43,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:43:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:43:43,984 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:44,054 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-06-05 22:43:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:43:44,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 22:43:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:44,063 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 22:43:44,063 INFO L226 Difference]: Without dead ends: 1752 [2021-06-05 22:43:44,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:43:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-06-05 22:43:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-06-05 22:43:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-06-05 22:43:44,095 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-06-05 22:43:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:44,097 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-06-05 22:43:44,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-06-05 22:43:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 22:43:44,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:44,100 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:44,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 22:43:44,100 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1548229740, now seen corresponding path program 4 times [2021-06-05 22:43:44,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:44,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183015512] [2021-06-05 22:43:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:44,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:44,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183015512] [2021-06-05 22:43:44,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183015512] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:44,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:43:44,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:43:44,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729262163] [2021-06-05 22:43:44,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:43:44,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:43:44,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:43:44,158 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:44,207 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-06-05 22:43:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:43:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 22:43:44,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:44,212 INFO L225 Difference]: With dead ends: 1137 [2021-06-05 22:43:44,213 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 22:43:44,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:43:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 22:43:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-06-05 22:43:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-06-05 22:43:44,235 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-06-05 22:43:44,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:44,235 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-06-05 22:43:44,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-06-05 22:43:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:43:44,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:44,238 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:44,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:43:44,239 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081166, now seen corresponding path program 1 times [2021-06-05 22:43:44,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:44,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543106442] [2021-06-05 22:43:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:44,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543106442] [2021-06-05 22:43:44,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543106442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:44,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347155951] [2021-06-05 22:43:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:43:44,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:44,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347155951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:44,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:44,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 22:43:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752342270] [2021-06-05 22:43:44,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:43:44,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:43:44,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:43:44,535 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:44,620 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-06-05 22:43:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:43:44,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 22:43:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:44,627 INFO L225 Difference]: With dead ends: 1388 [2021-06-05 22:43:44,627 INFO L226 Difference]: Without dead ends: 1388 [2021-06-05 22:43:44,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:43:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-05 22:43:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-06-05 22:43:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-06-05 22:43:44,652 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-06-05 22:43:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:44,652 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-06-05 22:43:44,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-06-05 22:43:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:43:44,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:44,654 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:44,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 22:43:44,873 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:44,873 INFO L82 PathProgramCache]: Analyzing trace with hash -775253682, now seen corresponding path program 2 times [2021-06-05 22:43:44,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:44,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190609445] [2021-06-05 22:43:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:44,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:44,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190609445] [2021-06-05 22:43:44,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190609445] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:44,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:43:44,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:43:44,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49029083] [2021-06-05 22:43:44,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:43:44,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:44,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:43:44,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:43:44,897 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:44,933 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-06-05 22:43:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:43:44,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 22:43:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:44,938 INFO L225 Difference]: With dead ends: 1113 [2021-06-05 22:43:44,938 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 22:43:44,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:43:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 22:43:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-06-05 22:43:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-06-05 22:43:44,957 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-06-05 22:43:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:44,958 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-06-05 22:43:44,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-06-05 22:43:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:43:44,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:44,961 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:44,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 22:43:44,961 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:44,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:44,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1393715960, now seen corresponding path program 1 times [2021-06-05 22:43:44,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:44,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635692254] [2021-06-05 22:43:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:44,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:44,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635692254] [2021-06-05 22:43:44,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635692254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:44,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096638807] [2021-06-05 22:43:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:43:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:45,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096638807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:45,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:45,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:43:45,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695270892] [2021-06-05 22:43:45,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:43:45,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:45,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:43:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:43:45,117 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:45,167 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-06-05 22:43:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:43:45,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 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 31 [2021-06-05 22:43:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:45,173 INFO L225 Difference]: With dead ends: 1404 [2021-06-05 22:43:45,173 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 22:43:45,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:43:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 22:43:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-06-05 22:43:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-06-05 22:43:45,193 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-06-05 22:43:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:45,193 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-06-05 22:43:45,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-06-05 22:43:45,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 22:43:45,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:45,196 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:45,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:43:45,409 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1732283312, now seen corresponding path program 2 times [2021-06-05 22:43:45,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:45,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658284902] [2021-06-05 22:43:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:45,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:45,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658284902] [2021-06-05 22:43:45,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658284902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:45,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736726399] [2021-06-05 22:43:45,439 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:43:45,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:45,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:43:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:45,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736726399] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:43:45,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:43:45,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-05 22:43:45,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21347143] [2021-06-05 22:43:45,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:43:45,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:43:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:43:45,556 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:45,592 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-06-05 22:43:45,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:43:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 22:43:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:45,605 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 22:43:45,605 INFO L226 Difference]: Without dead ends: 1063 [2021-06-05 22:43:45,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:43:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-05 22:43:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-06-05 22:43:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-06-05 22:43:45,624 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-06-05 22:43:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:45,624 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-06-05 22:43:45,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-06-05 22:43:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:43:45,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:45,626 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:45,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 22:43:45,841 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:45,842 INFO L82 PathProgramCache]: Analyzing trace with hash -237850558, now seen corresponding path program 1 times [2021-06-05 22:43:45,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:45,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307773008] [2021-06-05 22:43:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:45,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307773008] [2021-06-05 22:43:45,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307773008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:45,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657139018] [2021-06-05 22:43:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:45,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:43:45,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:43:46,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657139018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:46,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:46,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 22:43:46,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584673158] [2021-06-05 22:43:46,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:43:46,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:46,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:43:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:43:46,026 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:46,088 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-06-05 22:43:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:43:46,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 22:43:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:46,097 INFO L225 Difference]: With dead ends: 3683 [2021-06-05 22:43:46,097 INFO L226 Difference]: Without dead ends: 3245 [2021-06-05 22:43:46,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:43:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-06-05 22:43:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-06-05 22:43:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.8959881129271916) internal successors, (7866), 2019 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:46,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-06-05 22:43:46,151 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-06-05 22:43:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:46,151 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-06-05 22:43:46,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-06-05 22:43:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:43:46,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:46,156 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:46,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:46,369 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:46,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1992632042, now seen corresponding path program 2 times [2021-06-05 22:43:46,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:46,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304687340] [2021-06-05 22:43:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:46,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:46,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304687340] [2021-06-05 22:43:46,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304687340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:46,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200674154] [2021-06-05 22:43:46,410 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:46,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:43:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:46,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200674154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:46,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:46,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 22:43:46,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681695411] [2021-06-05 22:43:46,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:43:46,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:43:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:43:46,529 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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) [2021-06-05 22:43:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:46,603 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-06-05 22:43:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:43:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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 [2021-06-05 22:43:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:46,616 INFO L225 Difference]: With dead ends: 5705 [2021-06-05 22:43:46,617 INFO L226 Difference]: Without dead ends: 5282 [2021-06-05 22:43:46,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:43:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-06-05 22:43:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-06-05 22:43:46,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.987839771101574) internal successors, (11150), 2796 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-06-05 22:43:46,690 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-06-05 22:43:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:46,690 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-06-05 22:43:46,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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) [2021-06-05 22:43:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-06-05 22:43:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:43:46,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:46,696 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:46,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 22:43:46,914 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:46,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1695022730, now seen corresponding path program 3 times [2021-06-05 22:43:46,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:46,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955879802] [2021-06-05 22:43:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:46,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:46,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955879802] [2021-06-05 22:43:46,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955879802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:46,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967710097] [2021-06-05 22:43:46,963 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:47,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:43:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:47,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:43:47,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:47,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967710097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:47,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:47,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 22:43:47,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287281808] [2021-06-05 22:43:47,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:43:47,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:43:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:43:47,124 INFO L87 Difference]: Start difference. First operand 2797 states and 11150 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:47,194 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-06-05 22:43:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:43:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 22:43:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:47,207 INFO L225 Difference]: With dead ends: 5724 [2021-06-05 22:43:47,207 INFO L226 Difference]: Without dead ends: 5132 [2021-06-05 22:43:47,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:43:47,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-05 22:43:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-06-05 22:43:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.900565885206144) internal successors, (9650), 2474 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-06-05 22:43:47,282 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-06-05 22:43:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:47,282 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-06-05 22:43:47,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-06-05 22:43:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 22:43:47,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:47,287 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:47,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:47,505 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash -304519936, now seen corresponding path program 4 times [2021-06-05 22:43:47,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:47,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152556516] [2021-06-05 22:43:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:47,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:47,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152556516] [2021-06-05 22:43:47,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152556516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:47,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247051393] [2021-06-05 22:43:47,549 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:47,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:47,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:43:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:47,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247051393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:47,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:47,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:43:47,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389222300] [2021-06-05 22:43:47,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:43:47,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:47,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:43:47,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:43:47,683 INFO L87 Difference]: Start difference. First operand 2475 states and 9650 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:48,028 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-06-05 22:43:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:43:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 22:43:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:48,042 INFO L225 Difference]: With dead ends: 6143 [2021-06-05 22:43:48,043 INFO L226 Difference]: Without dead ends: 6077 [2021-06-05 22:43:48,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:43:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-06-05 22:43:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-06-05 22:43:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 3.9010911650827174) internal successors, (11083), 2841 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-06-05 22:43:48,147 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-06-05 22:43:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:48,147 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-06-05 22:43:48,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-06-05 22:43:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 22:43:48,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:48,153 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:48,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 22:43:48,371 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858692, now seen corresponding path program 5 times [2021-06-05 22:43:48,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:48,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858580220] [2021-06-05 22:43:48,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:48,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:48,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858580220] [2021-06-05 22:43:48,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858580220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:48,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251276726] [2021-06-05 22:43:48,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:48,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:43:48,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:43:48,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:48,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251276726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:48,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:48,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:43:48,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122965899] [2021-06-05 22:43:48,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:43:48,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:48,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:43:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:43:48,539 INFO L87 Difference]: Start difference. First operand 2842 states and 11083 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:48,757 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-06-05 22:43:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:43:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 35 [2021-06-05 22:43:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:48,781 INFO L225 Difference]: With dead ends: 10702 [2021-06-05 22:43:48,781 INFO L226 Difference]: Without dead ends: 10294 [2021-06-05 22:43:48,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:43:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-06-05 22:43:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-06-05 22:43:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 4.070002243661656) internal successors, (18140), 4457 states have internal predecessors, (18140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-06-05 22:43:48,907 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-06-05 22:43:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:48,907 INFO L482 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-06-05 22:43:48,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:48,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-06-05 22:43:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 22:43:48,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:48,941 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:49,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:43:49,142 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash -355168440, now seen corresponding path program 6 times [2021-06-05 22:43:49,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:49,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969856234] [2021-06-05 22:43:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:49,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:49,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:49,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969856234] [2021-06-05 22:43:49,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969856234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:49,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831918033] [2021-06-05 22:43:49,176 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:49,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:43:49,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:49,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:43:49,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:49,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831918033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:49,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:49,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 22:43:49,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642493899] [2021-06-05 22:43:49,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:43:49,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:49,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:43:49,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:43:49,297 INFO L87 Difference]: Start difference. First operand 4458 states and 18140 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:49,716 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-06-05 22:43:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:43:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 22:43:49,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:49,731 INFO L225 Difference]: With dead ends: 7423 [2021-06-05 22:43:49,731 INFO L226 Difference]: Without dead ends: 7391 [2021-06-05 22:43:49,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:43:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-06-05 22:43:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-06-05 22:43:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.056940266437473) internal successors, (18881), 4654 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-06-05 22:43:49,887 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-06-05 22:43:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:49,887 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-06-05 22:43:49,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-06-05 22:43:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 22:43:49,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:49,897 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:50,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:43:50,098 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:50,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1441421880, now seen corresponding path program 7 times [2021-06-05 22:43:50,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:50,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316927611] [2021-06-05 22:43:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:50,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:50,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316927611] [2021-06-05 22:43:50,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316927611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:50,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827052036] [2021-06-05 22:43:50,139 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:43:50,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:50,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827052036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:50,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:50,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 22:43:50,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787590373] [2021-06-05 22:43:50,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:43:50,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:50,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:43:50,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:43:50,285 INFO L87 Difference]: Start difference. First operand 4655 states and 18881 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:50,776 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-06-05 22:43:50,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:43:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 35 [2021-06-05 22:43:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:50,814 INFO L225 Difference]: With dead ends: 17746 [2021-06-05 22:43:50,814 INFO L226 Difference]: Without dead ends: 17648 [2021-06-05 22:43:50,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:43:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-06-05 22:43:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-06-05 22:43:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.241579872852698) internal successors, (31358), 7393 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-06-05 22:43:51,094 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-06-05 22:43:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:51,094 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-06-05 22:43:51,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-06-05 22:43:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 22:43:51,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:51,109 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:51,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:43:51,325 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1322322868, now seen corresponding path program 8 times [2021-06-05 22:43:51,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:51,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384965466] [2021-06-05 22:43:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:51,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:51,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384965466] [2021-06-05 22:43:51,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384965466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:51,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057009229] [2021-06-05 22:43:51,358 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:51,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:51,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:51,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:43:51,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:51,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057009229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:51,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:51,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 22:43:51,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664946984] [2021-06-05 22:43:51,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:43:51,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:43:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:43:51,478 INFO L87 Difference]: Start difference. First operand 7394 states and 31358 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:51,865 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-06-05 22:43:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:43:51,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 22:43:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:51,914 INFO L225 Difference]: With dead ends: 21973 [2021-06-05 22:43:51,914 INFO L226 Difference]: Without dead ends: 21443 [2021-06-05 22:43:51,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:43:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-06-05 22:43:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-06-05 22:43:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 4.463274894007104) internal successors, (38951), 8727 states have internal predecessors, (38951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-06-05 22:43:52,311 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-06-05 22:43:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:52,311 INFO L482 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-06-05 22:43:52,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-06-05 22:43:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 22:43:52,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:52,328 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:52,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:52,541 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1712284596, now seen corresponding path program 9 times [2021-06-05 22:43:52,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:52,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569442869] [2021-06-05 22:43:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:52,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:52,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569442869] [2021-06-05 22:43:52,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569442869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:52,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854030419] [2021-06-05 22:43:52,574 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:52,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:43:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:43:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:52,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854030419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:52,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:52,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:43:52,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351388605] [2021-06-05 22:43:52,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:43:52,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:52,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:43:52,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:43:52,683 INFO L87 Difference]: Start difference. First operand 8728 states and 38951 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:53,274 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-06-05 22:43:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:43:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 35 [2021-06-05 22:43:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:53,311 INFO L225 Difference]: With dead ends: 15939 [2021-06-05 22:43:53,311 INFO L226 Difference]: Without dead ends: 15563 [2021-06-05 22:43:53,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:43:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-06-05 22:43:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-06-05 22:43:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.418260519428227) internal successors, (43891), 9934 states have internal predecessors, (43891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-06-05 22:43:53,614 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-06-05 22:43:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:53,614 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-06-05 22:43:53,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-06-05 22:43:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 22:43:53,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:53,634 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:53,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:53,849 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:53,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:53,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1290484416, now seen corresponding path program 10 times [2021-06-05 22:43:53,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:53,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417103460] [2021-06-05 22:43:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:53,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:53,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417103460] [2021-06-05 22:43:53,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417103460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:53,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285895947] [2021-06-05 22:43:53,873 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:53,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:43:53,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:43:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:43:53,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285895947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:53,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:53,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 22:43:53,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921383998] [2021-06-05 22:43:53,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:43:53,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:53,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:43:53,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:43:53,974 INFO L87 Difference]: Start difference. First operand 9935 states and 43891 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:54,215 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-06-05 22:43:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:43:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 35 [2021-06-05 22:43:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:54,260 INFO L225 Difference]: With dead ends: 17650 [2021-06-05 22:43:54,260 INFO L226 Difference]: Without dead ends: 17578 [2021-06-05 22:43:54,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:43:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-06-05 22:43:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-06-05 22:43:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12387 states, 12386 states have (on average 4.56353948005813) internal successors, (56524), 12386 states have internal predecessors, (56524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-06-05 22:43:54,678 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-06-05 22:43:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:54,678 INFO L482 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-06-05 22:43:54,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-06-05 22:43:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:43:54,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:54,700 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:54,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 22:43:54,902 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:54,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:54,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1130396630, now seen corresponding path program 11 times [2021-06-05 22:43:54,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:54,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702149618] [2021-06-05 22:43:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:43:54,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:54,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702149618] [2021-06-05 22:43:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702149618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303254686] [2021-06-05 22:43:54,935 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:54,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:43:54,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:54,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:43:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:55,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303254686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:55,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:55,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:43:55,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967585031] [2021-06-05 22:43:55,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:43:55,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:55,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:43:55,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:43:55,051 INFO L87 Difference]: Start difference. First operand 12387 states and 56524 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:55,673 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-06-05 22:43:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:43:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 37 [2021-06-05 22:43:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:55,826 INFO L225 Difference]: With dead ends: 47667 [2021-06-05 22:43:55,826 INFO L226 Difference]: Without dead ends: 46072 [2021-06-05 22:43:55,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:43:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-06-05 22:43:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-06-05 22:43:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 4.81733791930175) internal successors, (130256), 27039 states have internal predecessors, (130256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-06-05 22:43:56,758 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-06-05 22:43:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:56,759 INFO L482 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-06-05 22:43:56,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-06-05 22:43:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:43:56,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:56,814 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:57,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:57,015 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash 483536730, now seen corresponding path program 12 times [2021-06-05 22:43:57,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:57,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372174936] [2021-06-05 22:43:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:43:57,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:57,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372174936] [2021-06-05 22:43:57,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372174936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:57,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578410768] [2021-06-05 22:43:57,049 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:57,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:43:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:43:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:43:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578410768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:57,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:57,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 22:43:57,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659629562] [2021-06-05 22:43:57,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:43:57,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:43:57,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:43:57,184 INFO L87 Difference]: Start difference. First operand 27040 states and 130256 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:57,777 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-06-05 22:43:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:43:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 [2021-06-05 22:43:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:43:58,014 INFO L225 Difference]: With dead ends: 41877 [2021-06-05 22:43:58,014 INFO L226 Difference]: Without dead ends: 41385 [2021-06-05 22:43:58,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:43:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-06-05 22:43:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-06-05 22:43:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26074 states, 26073 states have (on average 4.745944080082844) internal successors, (123741), 26073 states have internal predecessors, (123741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-06-05 22:43:58,660 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-06-05 22:43:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:43:58,660 INFO L482 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-06-05 22:43:58,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-06-05 22:43:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:43:58,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:43:58,715 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:43:58,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:43:58,916 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:43:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:43:58,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2021180106, now seen corresponding path program 13 times [2021-06-05 22:43:58,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:43:58,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18019867] [2021-06-05 22:43:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:43:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:43:58,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:43:58,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18019867] [2021-06-05 22:43:58,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18019867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:58,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92114681] [2021-06-05 22:43:58,958 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:43:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:43:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:43:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:43:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:43:59,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92114681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:43:59,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:43:59,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 22:43:59,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052529832] [2021-06-05 22:43:59,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:43:59,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:43:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:43:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:43:59,102 INFO L87 Difference]: Start difference. First operand 26074 states and 123741 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:43:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:43:59,948 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-06-05 22:43:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:43:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 [2021-06-05 22:43:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:00,137 INFO L225 Difference]: With dead ends: 55329 [2021-06-05 22:44:00,137 INFO L226 Difference]: Without dead ends: 54965 [2021-06-05 22:44:00,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:44:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-06-05 22:44:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-06-05 22:44:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37282 states, 37281 states have (on average 4.838925994474397) internal successors, (180400), 37281 states have internal predecessors, (180400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-06-05 22:44:01,249 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-06-05 22:44:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:01,249 INFO L482 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-06-05 22:44:01,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-06-05 22:44:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:44:01,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:01,322 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:01,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:01,522 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:01,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:01,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701498, now seen corresponding path program 14 times [2021-06-05 22:44:01,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:01,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999789970] [2021-06-05 22:44:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:44:01,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:01,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999789970] [2021-06-05 22:44:01,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999789970] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:44:01,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:44:01,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:44:01,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385572328] [2021-06-05 22:44:01,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:44:01,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:01,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:44:01,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:44:01,546 INFO L87 Difference]: Start difference. First operand 37282 states and 180400 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:01,914 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-06-05 22:44:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:44:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:44:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:02,019 INFO L225 Difference]: With dead ends: 36224 [2021-06-05 22:44:02,019 INFO L226 Difference]: Without dead ends: 36156 [2021-06-05 22:44:02,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:44:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-06-05 22:44:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-06-05 22:44:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.84787012626613) internal successors, (174693), 36035 states have internal predecessors, (174693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-06-05 22:44:02,890 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-06-05 22:44:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:02,890 INFO L482 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-06-05 22:44:02,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-06-05 22:44:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:44:02,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:02,968 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:02,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 22:44:02,968 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:02,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156776, now seen corresponding path program 15 times [2021-06-05 22:44:02,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:02,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162886089] [2021-06-05 22:44:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:44:02,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:02,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162886089] [2021-06-05 22:44:02,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162886089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:02,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356344507] [2021-06-05 22:44:02,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:03,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:44:03,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:03,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:44:03,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:44:03,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356344507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:03,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:03,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-06-05 22:44:03,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457902865] [2021-06-05 22:44:03,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:44:03,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:03,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:44:03,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:44:03,100 INFO L87 Difference]: Start difference. First operand 36036 states and 174693 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 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) [2021-06-05 22:44:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:03,817 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-06-05 22:44:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:44:03,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 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 39 [2021-06-05 22:44:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:03,978 INFO L225 Difference]: With dead ends: 51586 [2021-06-05 22:44:03,978 INFO L226 Difference]: Without dead ends: 50003 [2021-06-05 22:44:03,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:44:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-06-05 22:44:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-06-05 22:44:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45050 states, 45049 states have (on average 4.900574929521188) internal successors, (220766), 45049 states have internal predecessors, (220766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-06-05 22:44:05,251 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-06-05 22:44:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:05,252 INFO L482 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-06-05 22:44:05,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 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) [2021-06-05 22:44:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-06-05 22:44:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 22:44:05,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:05,340 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:05,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 22:44:05,544 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:05,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1915964464, now seen corresponding path program 16 times [2021-06-05 22:44:05,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:05,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269765202] [2021-06-05 22:44:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:05,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:05,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269765202] [2021-06-05 22:44:05,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269765202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:05,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700550092] [2021-06-05 22:44:05,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:05,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:05,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:44:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:05,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700550092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:05,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:05,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:44:05,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031849832] [2021-06-05 22:44:05,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:44:05,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:05,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:44:05,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:44:05,705 INFO L87 Difference]: Start difference. First operand 45050 states and 220766 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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) [2021-06-05 22:44:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:06,520 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-06-05 22:44:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:44:06,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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 39 [2021-06-05 22:44:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:06,739 INFO L225 Difference]: With dead ends: 63166 [2021-06-05 22:44:06,739 INFO L226 Difference]: Without dead ends: 63106 [2021-06-05 22:44:06,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:44:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-06-05 22:44:07,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-06-05 22:44:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43451 states, 43450 states have (on average 4.851162255466053) internal successors, (210783), 43450 states have internal predecessors, (210783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-06-05 22:44:07,984 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-06-05 22:44:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:07,984 INFO L482 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-06-05 22:44:07,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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) [2021-06-05 22:44:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-06-05 22:44:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:08,069 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:08,069 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:08,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:44:08,277 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1538179198, now seen corresponding path program 17 times [2021-06-05 22:44:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318478125] [2021-06-05 22:44:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:44:08,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:08,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318478125] [2021-06-05 22:44:08,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318478125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:08,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751357345] [2021-06-05 22:44:08,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:08,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:44:08,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:08,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:44:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:08,617 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 22:44:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:44:08,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751357345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:08,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:08,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:44:08,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400998122] [2021-06-05 22:44:08,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:44:08,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:08,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:44:08,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:44:08,738 INFO L87 Difference]: Start difference. First operand 43451 states and 210783 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:09,085 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-06-05 22:44:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:44:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:09,234 INFO L225 Difference]: With dead ends: 49744 [2021-06-05 22:44:09,234 INFO L226 Difference]: Without dead ends: 49407 [2021-06-05 22:44:09,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:44:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-06-05 22:44:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-06-05 22:44:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46276 states have (on average 4.791684674561328) internal successors, (221740), 46276 states have internal predecessors, (221740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-06-05 22:44:10,361 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-06-05 22:44:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:10,361 INFO L482 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-06-05 22:44:10,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-06-05 22:44:10,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:10,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:10,695 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:10,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 22:44:10,907 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:10,907 INFO L82 PathProgramCache]: Analyzing trace with hash 591667582, now seen corresponding path program 18 times [2021-06-05 22:44:10,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:10,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131830306] [2021-06-05 22:44:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:10,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:10,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131830306] [2021-06-05 22:44:10,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131830306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:10,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384516606] [2021-06-05 22:44:10,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:10,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:44:10,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:44:10,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:44:11,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384516606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:11,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:11,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 22:44:11,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426439018] [2021-06-05 22:44:11,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:44:11,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:44:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:44:11,126 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:11,569 INFO L93 Difference]: Finished difference Result 60825 states and 280291 transitions. [2021-06-05 22:44:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:44:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:11,769 INFO L225 Difference]: With dead ends: 60825 [2021-06-05 22:44:11,769 INFO L226 Difference]: Without dead ends: 59259 [2021-06-05 22:44:11,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:44:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2021-06-05 22:44:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 52848. [2021-06-05 22:44:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52848 states, 52847 states have (on average 4.702499668855375) internal successors, (248513), 52847 states have internal predecessors, (248513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52848 states to 52848 states and 248513 transitions. [2021-06-05 22:44:13,384 INFO L78 Accepts]: Start accepts. Automaton has 52848 states and 248513 transitions. Word has length 41 [2021-06-05 22:44:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:13,385 INFO L482 AbstractCegarLoop]: Abstraction has 52848 states and 248513 transitions. [2021-06-05 22:44:13,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 52848 states and 248513 transitions. [2021-06-05 22:44:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:13,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:13,502 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:13,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:44:13,703 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:13,703 INFO L82 PathProgramCache]: Analyzing trace with hash -261664514, now seen corresponding path program 19 times [2021-06-05 22:44:13,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:13,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144252126] [2021-06-05 22:44:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:13,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144252126] [2021-06-05 22:44:13,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144252126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253561674] [2021-06-05 22:44:13,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:13,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:44:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:44:13,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253561674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:13,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:13,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:44:13,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477202975] [2021-06-05 22:44:13,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:44:13,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:13,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:44:13,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:44:13,915 INFO L87 Difference]: Start difference. First operand 52848 states and 248513 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:14,368 INFO L93 Difference]: Finished difference Result 64976 states and 299967 transitions. [2021-06-05 22:44:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:44:14,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:14,567 INFO L225 Difference]: With dead ends: 64976 [2021-06-05 22:44:14,567 INFO L226 Difference]: Without dead ends: 64453 [2021-06-05 22:44:14,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:44:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64453 states. [2021-06-05 22:44:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64453 to 58787. [2021-06-05 22:44:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58787 states, 58786 states have (on average 4.700591977681761) internal successors, (276329), 58786 states have internal predecessors, (276329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58787 states to 58787 states and 276329 transitions. [2021-06-05 22:44:16,303 INFO L78 Accepts]: Start accepts. Automaton has 58787 states and 276329 transitions. Word has length 41 [2021-06-05 22:44:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:16,303 INFO L482 AbstractCegarLoop]: Abstraction has 58787 states and 276329 transitions. [2021-06-05 22:44:16,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 58787 states and 276329 transitions. [2021-06-05 22:44:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:16,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:16,444 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:16,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:16,644 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1787747650, now seen corresponding path program 20 times [2021-06-05 22:44:16,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:16,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601109837] [2021-06-05 22:44:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:16,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:16,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601109837] [2021-06-05 22:44:16,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601109837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:16,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662469615] [2021-06-05 22:44:16,704 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:16,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:16,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:44:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:44:16,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662469615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:16,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:16,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 22:44:16,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511473965] [2021-06-05 22:44:16,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:44:16,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:16,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:44:16,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:44:16,849 INFO L87 Difference]: Start difference. First operand 58787 states and 276329 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:17,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:17,788 INFO L93 Difference]: Finished difference Result 93655 states and 432022 transitions. [2021-06-05 22:44:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:44:17,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:17,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:18,107 INFO L225 Difference]: With dead ends: 93655 [2021-06-05 22:44:18,108 INFO L226 Difference]: Without dead ends: 91110 [2021-06-05 22:44:18,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:44:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91110 states. [2021-06-05 22:44:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91110 to 76620. [2021-06-05 22:44:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76620 states, 76619 states have (on average 4.695597697699005) internal successors, (359772), 76619 states have internal predecessors, (359772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76620 states to 76620 states and 359772 transitions. [2021-06-05 22:44:20,390 INFO L78 Accepts]: Start accepts. Automaton has 76620 states and 359772 transitions. Word has length 41 [2021-06-05 22:44:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:20,391 INFO L482 AbstractCegarLoop]: Abstraction has 76620 states and 359772 transitions. [2021-06-05 22:44:20,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 76620 states and 359772 transitions. [2021-06-05 22:44:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:20,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:20,558 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:20,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:20,761 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1211267282, now seen corresponding path program 21 times [2021-06-05 22:44:20,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:20,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747788222] [2021-06-05 22:44:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:20,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:20,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747788222] [2021-06-05 22:44:20,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747788222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:20,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502474122] [2021-06-05 22:44:20,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:20,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:44:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:20,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:44:20,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:20,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502474122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:20,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:20,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 22:44:20,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036288520] [2021-06-05 22:44:20,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:44:20,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:44:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:44:20,947 INFO L87 Difference]: Start difference. First operand 76620 states and 359772 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:22,432 INFO L93 Difference]: Finished difference Result 163014 states and 750713 transitions. [2021-06-05 22:44:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:44:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:23,495 INFO L225 Difference]: With dead ends: 163014 [2021-06-05 22:44:23,495 INFO L226 Difference]: Without dead ends: 159428 [2021-06-05 22:44:23,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:44:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159428 states. [2021-06-05 22:44:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159428 to 126993. [2021-06-05 22:44:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126993 states, 126992 states have (on average 4.747724266095502) internal successors, (602923), 126992 states have internal predecessors, (602923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126993 states to 126993 states and 602923 transitions. [2021-06-05 22:44:27,713 INFO L78 Accepts]: Start accepts. Automaton has 126993 states and 602923 transitions. Word has length 41 [2021-06-05 22:44:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:27,713 INFO L482 AbstractCegarLoop]: Abstraction has 126993 states and 602923 transitions. [2021-06-05 22:44:27,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 126993 states and 602923 transitions. [2021-06-05 22:44:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:27,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:27,993 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:28,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 22:44:28,194 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash 603954758, now seen corresponding path program 22 times [2021-06-05 22:44:28,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:28,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832816548] [2021-06-05 22:44:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:28,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:28,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832816548] [2021-06-05 22:44:28,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832816548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:28,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861168817] [2021-06-05 22:44:28,249 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:28,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:44:28,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:28,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:44:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:44:29,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861168817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:29,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:29,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 22:44:29,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580217091] [2021-06-05 22:44:29,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:44:29,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:29,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:44:29,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:44:29,002 INFO L87 Difference]: Start difference. First operand 126993 states and 602923 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:29,976 INFO L93 Difference]: Finished difference Result 156598 states and 736161 transitions. [2021-06-05 22:44:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:44:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:30,977 INFO L225 Difference]: With dead ends: 156598 [2021-06-05 22:44:30,977 INFO L226 Difference]: Without dead ends: 156198 [2021-06-05 22:44:30,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:44:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156198 states. [2021-06-05 22:44:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156198 to 123212. [2021-06-05 22:44:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123212 states, 123211 states have (on average 4.758925745266251) internal successors, (586352), 123211 states have internal predecessors, (586352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123212 states to 123212 states and 586352 transitions. [2021-06-05 22:44:35,230 INFO L78 Accepts]: Start accepts. Automaton has 123212 states and 586352 transitions. Word has length 41 [2021-06-05 22:44:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:35,231 INFO L482 AbstractCegarLoop]: Abstraction has 123212 states and 586352 transitions. [2021-06-05 22:44:35,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 123212 states and 586352 transitions. [2021-06-05 22:44:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:35,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:35,513 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:35,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:35,717 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash 295403914, now seen corresponding path program 23 times [2021-06-05 22:44:35,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:35,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692957286] [2021-06-05 22:44:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:35,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:35,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692957286] [2021-06-05 22:44:35,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692957286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:35,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425419842] [2021-06-05 22:44:35,784 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:35,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:44:35,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:35,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:44:35,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:44:35,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425419842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:35,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:35,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:44:35,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352891225] [2021-06-05 22:44:35,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:44:35,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:44:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:44:35,941 INFO L87 Difference]: Start difference. First operand 123212 states and 586352 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:37,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:37,531 INFO L93 Difference]: Finished difference Result 166888 states and 780472 transitions. [2021-06-05 22:44:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:44:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:38,543 INFO L225 Difference]: With dead ends: 166888 [2021-06-05 22:44:38,543 INFO L226 Difference]: Without dead ends: 163861 [2021-06-05 22:44:38,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:44:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163861 states. [2021-06-05 22:44:41,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163861 to 96217. [2021-06-05 22:44:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96217 states, 96216 states have (on average 4.736894071672071) internal successors, (455765), 96216 states have internal predecessors, (455765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-06-05 22:44:41,909 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-06-05 22:44:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:41,909 INFO L482 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-06-05 22:44:41,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-06-05 22:44:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:42,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:42,123 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:42,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 22:44:42,324 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash -904179714, now seen corresponding path program 24 times [2021-06-05 22:44:42,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:42,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302524042] [2021-06-05 22:44:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:42,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:42,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302524042] [2021-06-05 22:44:42,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302524042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:42,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848925685] [2021-06-05 22:44:42,383 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:42,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:44:42,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:44:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:43,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848925685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:43,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:43,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:44:43,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816391933] [2021-06-05 22:44:43,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:44:43,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:44:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:44:43,137 INFO L87 Difference]: Start difference. First operand 96217 states and 455765 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:43,834 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-06-05 22:44:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:44:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:44,235 INFO L225 Difference]: With dead ends: 118313 [2021-06-05 22:44:44,235 INFO L226 Difference]: Without dead ends: 118079 [2021-06-05 22:44:44,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:44:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-06-05 22:44:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-06-05 22:44:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101978 states, 101977 states have (on average 4.717151906802514) internal successors, (481041), 101977 states have internal predecessors, (481041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-06-05 22:44:47,665 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-06-05 22:44:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:47,665 INFO L482 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-06-05 22:44:47,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-06-05 22:44:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:47,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:47,937 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:48,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 22:44:48,138 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1636006098, now seen corresponding path program 25 times [2021-06-05 22:44:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:48,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865416415] [2021-06-05 22:44:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:48,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:48,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865416415] [2021-06-05 22:44:48,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865416415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:48,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171129933] [2021-06-05 22:44:48,196 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:44:48,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171129933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:48,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:48,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 22:44:48,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140111802] [2021-06-05 22:44:48,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:44:48,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:48,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:44:48,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:44:48,361 INFO L87 Difference]: Start difference. First operand 101978 states and 481041 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:49,829 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-06-05 22:44:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:44:49,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:50,638 INFO L225 Difference]: With dead ends: 131320 [2021-06-05 22:44:50,639 INFO L226 Difference]: Without dead ends: 130644 [2021-06-05 22:44:50,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:44:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-06-05 22:44:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-06-05 22:44:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113668 states, 113667 states have (on average 4.706968601265099) internal successors, (535027), 113667 states have internal predecessors, (535027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-06-05 22:44:53,854 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-06-05 22:44:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:44:53,854 INFO L482 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-06-05 22:44:53,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-06-05 22:44:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:44:54,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:44:54,122 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:44:54,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 22:44:54,322 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:44:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:44:54,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1028693574, now seen corresponding path program 26 times [2021-06-05 22:44:54,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:44:54,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917920476] [2021-06-05 22:44:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:44:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:44:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:54,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:44:54,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917920476] [2021-06-05 22:44:54,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917920476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:54,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262483877] [2021-06-05 22:44:54,381 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:44:54,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:44:54,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:44:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:44:54,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:44:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:44:54,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262483877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:44:54,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:44:54,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:44:54,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152776727] [2021-06-05 22:44:54,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:44:54,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:44:54,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:44:54,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:44:54,527 INFO L87 Difference]: Start difference. First operand 113668 states and 535027 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:44:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:44:55,942 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-06-05 22:44:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:44:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:44:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:44:56,425 INFO L225 Difference]: With dead ends: 140482 [2021-06-05 22:44:56,425 INFO L226 Difference]: Without dead ends: 139756 [2021-06-05 22:44:56,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:44:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-06-05 22:44:59,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-06-05 22:44:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118405 states, 118404 states have (on average 4.725110638154116) internal successors, (559472), 118404 states have internal predecessors, (559472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-06-05 22:45:00,174 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-06-05 22:45:00,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:00,174 INFO L482 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-06-05 22:45:00,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-06-05 22:45:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:00,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:00,430 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:00,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:45:00,631 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1153866818, now seen corresponding path program 27 times [2021-06-05 22:45:00,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:00,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961400834] [2021-06-05 22:45:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:00,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:00,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961400834] [2021-06-05 22:45:00,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961400834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:00,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012878986] [2021-06-05 22:45:00,697 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:00,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:45:00,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:00,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:45:00,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:00,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012878986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:00,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:00,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:45:00,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072372003] [2021-06-05 22:45:00,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:45:00,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:00,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:45:00,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:00,844 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:02,444 INFO L93 Difference]: Finished difference Result 186146 states and 866917 transitions. [2021-06-05 22:45:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:45:02,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:45:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:03,542 INFO L225 Difference]: With dead ends: 186146 [2021-06-05 22:45:03,544 INFO L226 Difference]: Without dead ends: 183395 [2021-06-05 22:45:03,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183395 states. [2021-06-05 22:45:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183395 to 148831. [2021-06-05 22:45:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148831 states, 148830 states have (on average 4.731868574884096) internal successors, (704244), 148830 states have internal predecessors, (704244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148831 states to 148831 states and 704244 transitions. [2021-06-05 22:45:08,408 INFO L78 Accepts]: Start accepts. Automaton has 148831 states and 704244 transitions. Word has length 41 [2021-06-05 22:45:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:08,409 INFO L482 AbstractCegarLoop]: Abstraction has 148831 states and 704244 transitions. [2021-06-05 22:45:08,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 148831 states and 704244 transitions. [2021-06-05 22:45:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:08,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:08,746 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:08,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 22:45:08,946 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:08,946 INFO L82 PathProgramCache]: Analyzing trace with hash 577386450, now seen corresponding path program 28 times [2021-06-05 22:45:08,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:08,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316708396] [2021-06-05 22:45:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:09,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:09,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316708396] [2021-06-05 22:45:09,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316708396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:09,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007227624] [2021-06-05 22:45:09,000 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:09,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:45:09,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:45:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:09,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007227624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:09,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:09,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 22:45:09,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39684719] [2021-06-05 22:45:09,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:45:09,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:09,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:45:09,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:45:09,743 INFO L87 Difference]: Start difference. First operand 148831 states and 704244 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:12,098 INFO L93 Difference]: Finished difference Result 327820 states and 1534054 transitions. [2021-06-05 22:45:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:45:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:45:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:14,015 INFO L225 Difference]: With dead ends: 327820 [2021-06-05 22:45:14,016 INFO L226 Difference]: Without dead ends: 324633 [2021-06-05 22:45:14,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 730.9ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:45:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324633 states. [2021-06-05 22:45:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324633 to 239665. [2021-06-05 22:45:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239665 states, 239664 states have (on average 4.810242673075639) internal successors, (1152842), 239664 states have internal predecessors, (1152842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239665 states to 239665 states and 1152842 transitions. [2021-06-05 22:45:23,595 INFO L78 Accepts]: Start accepts. Automaton has 239665 states and 1152842 transitions. Word has length 41 [2021-06-05 22:45:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:23,595 INFO L482 AbstractCegarLoop]: Abstraction has 239665 states and 1152842 transitions. [2021-06-05 22:45:23,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 239665 states and 1152842 transitions. [2021-06-05 22:45:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:24,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:24,853 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:25,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:25,068 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:25,069 INFO L82 PathProgramCache]: Analyzing trace with hash -29926074, now seen corresponding path program 29 times [2021-06-05 22:45:25,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:25,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656319674] [2021-06-05 22:45:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:25,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656319674] [2021-06-05 22:45:25,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656319674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:25,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924456122] [2021-06-05 22:45:25,133 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:25,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:45:25,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:45:25,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:25,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924456122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:25,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:25,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:45:25,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136023422] [2021-06-05 22:45:25,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:45:25,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:45:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:25,287 INFO L87 Difference]: Start difference. First operand 239665 states and 1152842 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:27,462 INFO L93 Difference]: Finished difference Result 283707 states and 1353356 transitions. [2021-06-05 22:45:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:45:27,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:45:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:29,151 INFO L225 Difference]: With dead ends: 283707 [2021-06-05 22:45:29,151 INFO L226 Difference]: Without dead ends: 283245 [2021-06-05 22:45:29,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283245 states. [2021-06-05 22:45:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283245 to 208767. [2021-06-05 22:45:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208767 states, 208766 states have (on average 4.808431449565543) internal successors, (1003837), 208766 states have internal predecessors, (1003837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208767 states to 208767 states and 1003837 transitions. [2021-06-05 22:45:36,902 INFO L78 Accepts]: Start accepts. Automaton has 208767 states and 1003837 transitions. Word has length 41 [2021-06-05 22:45:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:36,903 INFO L482 AbstractCegarLoop]: Abstraction has 208767 states and 1003837 transitions. [2021-06-05 22:45:36,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 208767 states and 1003837 transitions. [2021-06-05 22:45:37,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:37,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:37,450 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:37,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:45:37,651 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:37,651 INFO L82 PathProgramCache]: Analyzing trace with hash -338476918, now seen corresponding path program 30 times [2021-06-05 22:45:37,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:37,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554646283] [2021-06-05 22:45:37,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:37,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:37,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554646283] [2021-06-05 22:45:37,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554646283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:37,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239300449] [2021-06-05 22:45:37,722 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:37,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:45:37,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:37,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:45:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:37,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239300449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:37,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:37,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 22:45:37,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120322818] [2021-06-05 22:45:37,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:45:37,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:37,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:45:37,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:45:37,887 INFO L87 Difference]: Start difference. First operand 208767 states and 1003837 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:40,514 INFO L93 Difference]: Finished difference Result 263379 states and 1254429 transitions. [2021-06-05 22:45:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:45:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:45:40,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:42,457 INFO L225 Difference]: With dead ends: 263379 [2021-06-05 22:45:42,458 INFO L226 Difference]: Without dead ends: 260502 [2021-06-05 22:45:42,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:45:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260502 states. [2021-06-05 22:45:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260502 to 116427. [2021-06-05 22:45:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116427 states, 116426 states have (on average 4.769922525896278) internal successors, (555343), 116426 states have internal predecessors, (555343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-06-05 22:45:47,424 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-06-05 22:45:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:47,424 INFO L482 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-06-05 22:45:47,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-06-05 22:45:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:47,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:47,682 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:47,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 22:45:47,883 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:47,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:47,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1886674710, now seen corresponding path program 31 times [2021-06-05 22:45:47,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:47,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862862206] [2021-06-05 22:45:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:47,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:47,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862862206] [2021-06-05 22:45:47,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862862206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:47,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116430383] [2021-06-05 22:45:47,953 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:45:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:48,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116430383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:48,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:48,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 22:45:48,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32161971] [2021-06-05 22:45:48,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:45:48,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:45:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:45:48,073 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:50,360 INFO L93 Difference]: Finished difference Result 223049 states and 1035432 transitions. [2021-06-05 22:45:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:45:50,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:45:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:45:51,267 INFO L225 Difference]: With dead ends: 223049 [2021-06-05 22:45:51,267 INFO L226 Difference]: Without dead ends: 220377 [2021-06-05 22:45:51,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:45:51,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220377 states. [2021-06-05 22:45:55,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220377 to 155837. [2021-06-05 22:45:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155837 states, 155836 states have (on average 4.806129520778254) internal successors, (748968), 155836 states have internal predecessors, (748968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155837 states to 155837 states and 748968 transitions. [2021-06-05 22:45:57,173 INFO L78 Accepts]: Start accepts. Automaton has 155837 states and 748968 transitions. Word has length 41 [2021-06-05 22:45:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:45:57,173 INFO L482 AbstractCegarLoop]: Abstraction has 155837 states and 748968 transitions. [2021-06-05 22:45:57,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 155837 states and 748968 transitions. [2021-06-05 22:45:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:45:57,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:45:57,575 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:45:57,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:57,775 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:45:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:45:57,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1658788934, now seen corresponding path program 32 times [2021-06-05 22:45:57,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:45:57,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423783107] [2021-06-05 22:45:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:45:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:45:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:45:57,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:45:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423783107] [2021-06-05 22:45:57,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423783107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:57,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219506945] [2021-06-05 22:45:57,832 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:45:57,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:45:57,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:45:57,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:45:57,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:45:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:45:57,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219506945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:45:57,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:45:57,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:45:57,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955253320] [2021-06-05 22:45:57,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:45:57,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:45:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:45:57,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:45:57,971 INFO L87 Difference]: Start difference. First operand 155837 states and 748968 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:45:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:45:59,945 INFO L93 Difference]: Finished difference Result 212915 states and 1012751 transitions. [2021-06-05 22:45:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:45:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:45:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:01,261 INFO L225 Difference]: With dead ends: 212915 [2021-06-05 22:46:01,261 INFO L226 Difference]: Without dead ends: 210423 [2021-06-05 22:46:01,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:46:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210423 states. [2021-06-05 22:46:06,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210423 to 174189. [2021-06-05 22:46:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174189 states, 174188 states have (on average 4.835143637908467) internal successors, (842224), 174188 states have internal predecessors, (842224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174189 states to 174189 states and 842224 transitions. [2021-06-05 22:46:07,623 INFO L78 Accepts]: Start accepts. Automaton has 174189 states and 842224 transitions. Word has length 41 [2021-06-05 22:46:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:07,624 INFO L482 AbstractCegarLoop]: Abstraction has 174189 states and 842224 transitions. [2021-06-05 22:46:07,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 174189 states and 842224 transitions. [2021-06-05 22:46:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:08,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:08,045 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:08,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 22:46:08,245 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2084693554, now seen corresponding path program 33 times [2021-06-05 22:46:08,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:08,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594897861] [2021-06-05 22:46:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:08,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594897861] [2021-06-05 22:46:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594897861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357488864] [2021-06-05 22:46:08,307 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:08,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:46:08,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:08,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:46:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:08,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357488864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:08,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:08,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 22:46:08,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361727698] [2021-06-05 22:46:08,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:46:08,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:08,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:46:08,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:46:08,455 INFO L87 Difference]: Start difference. First operand 174189 states and 842224 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:12,720 INFO L93 Difference]: Finished difference Result 397194 states and 1899439 transitions. [2021-06-05 22:46:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:46:12,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:46:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:14,417 INFO L225 Difference]: With dead ends: 397194 [2021-06-05 22:46:14,417 INFO L226 Difference]: Without dead ends: 393877 [2021-06-05 22:46:14,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:46:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393877 states. [2021-06-05 22:46:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393877 to 269480. [2021-06-05 22:46:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269480 states, 269479 states have (on average 4.951157604117575) internal successors, (1334233), 269479 states have internal predecessors, (1334233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269480 states to 269480 states and 1334233 transitions. [2021-06-05 22:46:27,086 INFO L78 Accepts]: Start accepts. Automaton has 269480 states and 1334233 transitions. Word has length 41 [2021-06-05 22:46:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:27,086 INFO L482 AbstractCegarLoop]: Abstraction has 269480 states and 1334233 transitions. [2021-06-05 22:46:27,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 269480 states and 1334233 transitions. [2021-06-05 22:46:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:28,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:28,717 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:28,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:28,932 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:28,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:28,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1494171274, now seen corresponding path program 34 times [2021-06-05 22:46:28,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:28,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983369456] [2021-06-05 22:46:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:29,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:29,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983369456] [2021-06-05 22:46:29,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983369456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:29,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076670880] [2021-06-05 22:46:29,002 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:29,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:46:29,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:29,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:46:29,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:46:29,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076670880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:29,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:29,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 22:46:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147829425] [2021-06-05 22:46:29,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:46:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:46:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:46:29,207 INFO L87 Difference]: Start difference. First operand 269480 states and 1334233 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:32,239 INFO L93 Difference]: Finished difference Result 316931 states and 1549745 transitions. [2021-06-05 22:46:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:46:32,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:46:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:34,769 INFO L225 Difference]: With dead ends: 316931 [2021-06-05 22:46:34,769 INFO L226 Difference]: Without dead ends: 316481 [2021-06-05 22:46:34,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:46:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316481 states. [2021-06-05 22:46:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316481 to 205144. [2021-06-05 22:46:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205144 states, 205143 states have (on average 4.904305776945837) internal successors, (1006084), 205143 states have internal predecessors, (1006084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205144 states to 205144 states and 1006084 transitions. [2021-06-05 22:46:42,793 INFO L78 Accepts]: Start accepts. Automaton has 205144 states and 1006084 transitions. Word has length 41 [2021-06-05 22:46:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:46:42,793 INFO L482 AbstractCegarLoop]: Abstraction has 205144 states and 1006084 transitions. [2021-06-05 22:46:42,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 205144 states and 1006084 transitions. [2021-06-05 22:46:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 22:46:43,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:46:43,303 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:46:43,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 22:46:43,504 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:46:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:46:43,504 INFO L82 PathProgramCache]: Analyzing trace with hash 518963082, now seen corresponding path program 35 times [2021-06-05 22:46:43,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:46:43,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140560330] [2021-06-05 22:46:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:46:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:46:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:46:43,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:46:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140560330] [2021-06-05 22:46:43,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140560330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:43,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416037154] [2021-06-05 22:46:43,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:46:43,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:46:43,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:46:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:46:43,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:46:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:46:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416037154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:46:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:46:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 22:46:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544957041] [2021-06-05 22:46:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:46:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:46:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:46:43,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:46:43,732 INFO L87 Difference]: Start difference. First operand 205144 states and 1006084 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:46:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:46:46,964 INFO L93 Difference]: Finished difference Result 351280 states and 1697991 transitions. [2021-06-05 22:46:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:46:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 22:46:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:46:49,117 INFO L225 Difference]: With dead ends: 351280 [2021-06-05 22:46:49,118 INFO L226 Difference]: Without dead ends: 347746 [2021-06-05 22:46:49,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:46:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347746 states. [2021-06-05 22:46:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347746 to 266100. [2021-06-05 22:46:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266100 states, 266099 states have (on average 4.991721126347713) internal successors, (1328292), 266099 states have internal predecessors, (1328292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266100 states to 266100 states and 1328292 transitions. [2021-06-05 22:47:00,167 INFO L78 Accepts]: Start accepts. Automaton has 266100 states and 1328292 transitions. Word has length 41 [2021-06-05 22:47:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:00,167 INFO L482 AbstractCegarLoop]: Abstraction has 266100 states and 1328292 transitions. [2021-06-05 22:47:00,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:00,168 INFO L276 IsEmpty]: Start isEmpty. Operand 266100 states and 1328292 transitions. [2021-06-05 22:47:01,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 22:47:01,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:01,458 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:01,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 22:47:01,674 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 445372220, now seen corresponding path program 36 times [2021-06-05 22:47:01,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:01,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231232956] [2021-06-05 22:47:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:47:01,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:01,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231232956] [2021-06-05 22:47:01,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231232956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:01,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026170858] [2021-06-05 22:47:01,724 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:01,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:47:01,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:01,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:01,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:47:01,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026170858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:01,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:01,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:47:01,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432187622] [2021-06-05 22:47:01,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:47:01,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:01,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:47:01,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:47:01,866 INFO L87 Difference]: Start difference. First operand 266100 states and 1328292 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:06,379 INFO L93 Difference]: Finished difference Result 517007 states and 2493362 transitions. [2021-06-05 22:47:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:47:06,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 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 43 [2021-06-05 22:47:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:11,208 INFO L225 Difference]: With dead ends: 517007 [2021-06-05 22:47:11,208 INFO L226 Difference]: Without dead ends: 515961 [2021-06-05 22:47:11,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:47:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515961 states. [2021-06-05 22:47:20,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515961 to 210221. [2021-06-05 22:47:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210221 states, 210220 states have (on average 4.792717153458282) internal successors, (1007525), 210220 states have internal predecessors, (1007525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210221 states to 210221 states and 1007525 transitions. [2021-06-05 22:47:21,886 INFO L78 Accepts]: Start accepts. Automaton has 210221 states and 1007525 transitions. Word has length 43 [2021-06-05 22:47:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:21,886 INFO L482 AbstractCegarLoop]: Abstraction has 210221 states and 1007525 transitions. [2021-06-05 22:47:21,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 210221 states and 1007525 transitions. [2021-06-05 22:47:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 22:47:22,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:22,473 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:22,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 22:47:22,682 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:22,682 INFO L82 PathProgramCache]: Analyzing trace with hash -172125824, now seen corresponding path program 37 times [2021-06-05 22:47:22,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:22,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592496864] [2021-06-05 22:47:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:47:22,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:22,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592496864] [2021-06-05 22:47:22,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592496864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:22,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186904088] [2021-06-05 22:47:22,724 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:22,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:47:22,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:47:22,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186904088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:22,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:22,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:47:22,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755467155] [2021-06-05 22:47:22,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:47:22,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:47:22,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:47:22,844 INFO L87 Difference]: Start difference. First operand 210221 states and 1007525 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2021-06-05 22:47:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:27,585 INFO L93 Difference]: Finished difference Result 490894 states and 2284771 transitions. [2021-06-05 22:47:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:47:27,586 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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 43 [2021-06-05 22:47:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:30,188 INFO L225 Difference]: With dead ends: 490894 [2021-06-05 22:47:30,188 INFO L226 Difference]: Without dead ends: 487402 [2021-06-05 22:47:30,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:47:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487402 states. [2021-06-05 22:47:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487402 to 245403. [2021-06-05 22:47:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245403 states, 245402 states have (on average 4.805160512139265) internal successors, (1179196), 245402 states have internal predecessors, (1179196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245403 states to 245403 states and 1179196 transitions. [2021-06-05 22:47:41,426 INFO L78 Accepts]: Start accepts. Automaton has 245403 states and 1179196 transitions. Word has length 43 [2021-06-05 22:47:41,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:41,426 INFO L482 AbstractCegarLoop]: Abstraction has 245403 states and 1179196 transitions. [2021-06-05 22:47:41,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2021-06-05 22:47:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 245403 states and 1179196 transitions. [2021-06-05 22:47:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 22:47:42,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:42,125 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:42,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 22:47:42,325 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:42,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1881822596, now seen corresponding path program 38 times [2021-06-05 22:47:42,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:42,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061701077] [2021-06-05 22:47:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:47:42,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:42,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061701077] [2021-06-05 22:47:42,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061701077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:42,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838865718] [2021-06-05 22:47:42,361 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:42,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:47:42,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:42,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:42,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:47:42,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838865718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:42,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:42,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:47:42,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811097467] [2021-06-05 22:47:42,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:47:42,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:47:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:47:42,503 INFO L87 Difference]: Start difference. First operand 245403 states and 1179196 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:47:46,262 INFO L93 Difference]: Finished difference Result 401083 states and 1918180 transitions. [2021-06-05 22:47:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:47:46,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 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 43 [2021-06-05 22:47:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:47:48,654 INFO L225 Difference]: With dead ends: 401083 [2021-06-05 22:47:48,654 INFO L226 Difference]: Without dead ends: 400185 [2021-06-05 22:47:48,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:47:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400185 states. [2021-06-05 22:47:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400185 to 102134. [2021-06-05 22:47:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102134 states, 102133 states have (on average 4.781363516199465) internal successors, (488335), 102133 states have internal predecessors, (488335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-06-05 22:47:54,525 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-06-05 22:47:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:47:54,525 INFO L482 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-06-05 22:47:54,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:47:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-06-05 22:47:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 22:47:55,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:47:55,703 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:47:55,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:55,917 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:47:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:47:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1183096580, now seen corresponding path program 39 times [2021-06-05 22:47:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:47:55,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922105001] [2021-06-05 22:47:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:47:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:47:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:47:55,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:47:55,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922105001] [2021-06-05 22:47:55,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922105001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:55,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905831669] [2021-06-05 22:47:55,974 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:47:56,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:47:56,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:47:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:47:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:47:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:47:56,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905831669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:47:56,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:47:56,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 22:47:56,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507320811] [2021-06-05 22:47:56,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:47:56,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:47:56,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:47:56,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:47:56,164 INFO L87 Difference]: Start difference. First operand 102134 states and 488335 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:00,381 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-06-05 22:48:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:48:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 43 [2021-06-05 22:48:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:01,840 INFO L225 Difference]: With dead ends: 359669 [2021-06-05 22:48:01,840 INFO L226 Difference]: Without dead ends: 358139 [2021-06-05 22:48:01,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 914.0ms TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:48:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-06-05 22:48:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-06-05 22:48:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139202 states, 139201 states have (on average 4.859584342066508) internal successors, (676459), 139201 states have internal predecessors, (676459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-06-05 22:48:08,395 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-06-05 22:48:08,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:08,395 INFO L482 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-06-05 22:48:08,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-06-05 22:48:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 22:48:09,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:09,388 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:09,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:48:09,588 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1105009528, now seen corresponding path program 40 times [2021-06-05 22:48:09,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:09,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705318115] [2021-06-05 22:48:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 22:48:09,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705318115] [2021-06-05 22:48:09,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705318115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138662251] [2021-06-05 22:48:09,629 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:09,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:48:09,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:48:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 22:48:09,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138662251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:09,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:09,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 22:48:09,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015163579] [2021-06-05 22:48:09,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:48:09,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:48:09,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:48:09,772 INFO L87 Difference]: Start difference. First operand 139202 states and 676459 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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) [2021-06-05 22:48:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:12,987 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-06-05 22:48:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:48:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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 43 [2021-06-05 22:48:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:14,312 INFO L225 Difference]: With dead ends: 318028 [2021-06-05 22:48:14,312 INFO L226 Difference]: Without dead ends: 317616 [2021-06-05 22:48:14,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:48:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-06-05 22:48:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-06-05 22:48:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168176 states, 168175 states have (on average 4.916592834844656) internal successors, (826848), 168175 states have internal predecessors, (826848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-06-05 22:48:21,008 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-06-05 22:48:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:21,008 INFO L482 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-06-05 22:48:21,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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) [2021-06-05 22:48:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-06-05 22:48:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:48:21,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:21,431 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:21,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:21,631 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:21,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1379806714, now seen corresponding path program 41 times [2021-06-05 22:48:21,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:21,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70358062] [2021-06-05 22:48:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:48:21,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:21,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70358062] [2021-06-05 22:48:21,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70358062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248639810] [2021-06-05 22:48:21,701 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:21,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:48:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:21,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:48:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 22:48:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248639810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:21,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:21,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 22:48:21,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901462916] [2021-06-05 22:48:21,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:48:21,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:21,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:48:21,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:48:21,847 INFO L87 Difference]: Start difference. First operand 168176 states and 826848 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 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) [2021-06-05 22:48:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:28,232 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-06-05 22:48:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:48:28,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 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 45 [2021-06-05 22:48:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:31,655 INFO L225 Difference]: With dead ends: 593260 [2021-06-05 22:48:31,655 INFO L226 Difference]: Without dead ends: 584415 [2021-06-05 22:48:31,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:48:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-06-05 22:48:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-06-05 22:48:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206454 states, 206453 states have (on average 4.905571728189951) internal successors, (1012770), 206453 states have internal predecessors, (1012770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:48:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-06-05 22:48:42,452 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-06-05 22:48:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:48:42,452 INFO L482 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-06-05 22:48:42,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 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) [2021-06-05 22:48:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-06-05 22:48:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:48:43,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:48:43,387 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:48:43,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:43,607 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:48:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:48:43,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1913141946, now seen corresponding path program 42 times [2021-06-05 22:48:43,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:48:43,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135236909] [2021-06-05 22:48:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:48:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:48:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 22:48:43,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:48:43,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135236909] [2021-06-05 22:48:43,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135236909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:43,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224860513] [2021-06-05 22:48:43,659 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:48:43,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:48:43,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:48:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:48:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:48:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 22:48:43,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224860513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:48:43,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:48:43,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-05 22:48:43,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901765396] [2021-06-05 22:48:43,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:48:43,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:48:43,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:48:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:48:43,852 INFO L87 Difference]: Start difference. First operand 206454 states and 1012770 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 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) [2021-06-05 22:48:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:48:50,844 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-06-05 22:48:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 22:48:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 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 45 [2021-06-05 22:48:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:48:53,747 INFO L225 Difference]: With dead ends: 489163 [2021-06-05 22:48:53,747 INFO L226 Difference]: Without dead ends: 486417 [2021-06-05 22:48:53,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 1514.9ms TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 22:48:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-06-05 22:49:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-06-05 22:49:01,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219978 states, 219977 states have (on average 4.848534164935425) internal successors, (1066566), 219977 states have internal predecessors, (1066566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-06-05 22:49:03,239 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-06-05 22:49:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:03,240 INFO L482 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-06-05 22:49:03,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 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) [2021-06-05 22:49:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-06-05 22:49:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:49:04,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:04,551 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:04,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 22:49:04,752 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1307644630, now seen corresponding path program 43 times [2021-06-05 22:49:04,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:04,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395214341] [2021-06-05 22:49:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:49:04,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395214341] [2021-06-05 22:49:04,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395214341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023063880] [2021-06-05 22:49:04,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:49:04,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:49:04,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023063880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:04,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:04,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:49:04,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500422595] [2021-06-05 22:49:04,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:49:04,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:04,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:49:04,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:49:04,943 INFO L87 Difference]: Start difference. First operand 219978 states and 1066566 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:08,284 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-06-05 22:49:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:49:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 45 [2021-06-05 22:49:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:09,693 INFO L225 Difference]: With dead ends: 345677 [2021-06-05 22:49:09,693 INFO L226 Difference]: Without dead ends: 344598 [2021-06-05 22:49:09,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:49:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-06-05 22:49:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-06-05 22:49:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187807 states, 187806 states have (on average 4.840143552389168) internal successors, (909008), 187806 states have internal predecessors, (909008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-06-05 22:49:17,398 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-06-05 22:49:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:17,398 INFO L482 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-06-05 22:49:17,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-06-05 22:49:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:49:17,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:17,898 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:18,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:18,101 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2065809986, now seen corresponding path program 44 times [2021-06-05 22:49:18,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:18,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6191498] [2021-06-05 22:49:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 22:49:18,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6191498] [2021-06-05 22:49:18,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6191498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858718599] [2021-06-05 22:49:18,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:18,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:49:18,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:18,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:49:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:49:18,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858718599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:18,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:18,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 22:49:18,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480668889] [2021-06-05 22:49:18,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:49:18,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:49:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:49:18,268 INFO L87 Difference]: Start difference. First operand 187807 states and 909008 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:19,163 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 22:49:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:22,890 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-06-05 22:49:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:49:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 45 [2021-06-05 22:49:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:24,990 INFO L225 Difference]: With dead ends: 362878 [2021-06-05 22:49:24,990 INFO L226 Difference]: Without dead ends: 361792 [2021-06-05 22:49:24,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1030.0ms TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:49:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-06-05 22:49:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-06-05 22:49:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265120 states, 265119 states have (on average 4.861846944202415) internal successors, (1288968), 265119 states have internal predecessors, (1288968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-06-05 22:49:34,032 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-06-05 22:49:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:49:34,032 INFO L482 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-06-05 22:49:34,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-06-05 22:49:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:49:34,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:49:34,760 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:49:34,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 22:49:34,961 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:49:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:49:34,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2086232522, now seen corresponding path program 45 times [2021-06-05 22:49:34,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:49:34,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228687244] [2021-06-05 22:49:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:49:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:49:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:49:35,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:49:35,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228687244] [2021-06-05 22:49:35,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228687244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:35,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634457016] [2021-06-05 22:49:35,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:49:35,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:49:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:49:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:49:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:49:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:49:35,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634457016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:49:35,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:49:35,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 22:49:35,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222360879] [2021-06-05 22:49:35,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:49:35,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:49:35,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:49:35,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:49:35,161 INFO L87 Difference]: Start difference. First operand 265120 states and 1288968 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:49:36,323 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-06-05 22:49:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:49:42,222 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-06-05 22:49:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 22:49:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 22:49:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:49:45,368 INFO L225 Difference]: With dead ends: 557436 [2021-06-05 22:49:45,368 INFO L226 Difference]: Without dead ends: 555086 [2021-06-05 22:49:45,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1862.9ms TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 22:49:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. [2021-06-05 22:49:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555086 to 417023. [2021-06-05 22:49:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417023 states, 417022 states have (on average 4.902988331550853) internal successors, (2044654), 417022 states have internal predecessors, (2044654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417023 states to 417023 states and 2044654 transitions. [2021-06-05 22:50:01,882 INFO L78 Accepts]: Start accepts. Automaton has 417023 states and 2044654 transitions. Word has length 45 [2021-06-05 22:50:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:01,882 INFO L482 AbstractCegarLoop]: Abstraction has 417023 states and 2044654 transitions. [2021-06-05 22:50:01,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:01,882 INFO L276 IsEmpty]: Start isEmpty. Operand 417023 states and 2044654 transitions. [2021-06-05 22:50:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:50:03,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:03,663 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:03,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:03,863 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash -113271554, now seen corresponding path program 46 times [2021-06-05 22:50:03,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:03,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665992145] [2021-06-05 22:50:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 22:50:03,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:03,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665992145] [2021-06-05 22:50:03,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665992145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:03,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325541438] [2021-06-05 22:50:03,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:03,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:50:03,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:03,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:50:03,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 22:50:04,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325541438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:04,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:04,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 22:50:04,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929519710] [2021-06-05 22:50:04,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:50:04,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:04,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:50:04,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:50:04,052 INFO L87 Difference]: Start difference. First operand 417023 states and 2044654 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:15,738 INFO L93 Difference]: Finished difference Result 928977 states and 4483718 transitions. [2021-06-05 22:50:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:50:15,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 22:50:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:21,402 INFO L225 Difference]: With dead ends: 928977 [2021-06-05 22:50:21,402 INFO L226 Difference]: Without dead ends: 928257 [2021-06-05 22:50:21,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:50:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928257 states. [2021-06-05 22:50:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928257 to 605432. [2021-06-05 22:50:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605432 states, 605431 states have (on average 4.958003471906791) internal successors, (3001729), 605431 states have internal predecessors, (3001729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605432 states to 605432 states and 3001729 transitions. [2021-06-05 22:50:49,438 INFO L78 Accepts]: Start accepts. Automaton has 605432 states and 3001729 transitions. Word has length 45 [2021-06-05 22:50:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:49,438 INFO L482 AbstractCegarLoop]: Abstraction has 605432 states and 3001729 transitions. [2021-06-05 22:50:49,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 605432 states and 3001729 transitions. [2021-06-05 22:50:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:50:52,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:52,717 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:52,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 22:50:52,934 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:52,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1285587010, now seen corresponding path program 47 times [2021-06-05 22:50:52,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:52,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744740132] [2021-06-05 22:50:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:50:52,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:52,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744740132] [2021-06-05 22:50:52,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744740132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:52,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230344449] [2021-06-05 22:50:52,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:53,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:50:53,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:53,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:50:53,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:50:53,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230344449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:53,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:53,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 22:50:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199963884] [2021-06-05 22:50:53,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:50:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:50:53,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:50:53,176 INFO L87 Difference]: Start difference. First operand 605432 states and 3001729 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:07,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:07,796 INFO L93 Difference]: Finished difference Result 1140384 states and 5478626 transitions. [2021-06-05 22:51:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:51:07,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 22:51:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:18,234 INFO L225 Difference]: With dead ends: 1140384 [2021-06-05 22:51:18,235 INFO L226 Difference]: Without dead ends: 1137922 [2021-06-05 22:51:18,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1167.3ms TimeCoverageRelationStatistics Valid=660, Invalid=2096, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:51:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137922 states. [2021-06-05 22:51:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137922 to 669469. [2021-06-05 22:51:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669469 states, 669468 states have (on average 4.940984483201587) internal successors, (3307831), 669468 states have internal predecessors, (3307831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669469 states to 669469 states and 3307831 transitions. [2021-06-05 22:51:53,791 INFO L78 Accepts]: Start accepts. Automaton has 669469 states and 3307831 transitions. Word has length 45 [2021-06-05 22:51:53,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:53,792 INFO L482 AbstractCegarLoop]: Abstraction has 669469 states and 3307831 transitions. [2021-06-05 22:51:53,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:53,792 INFO L276 IsEmpty]: Start isEmpty. Operand 669469 states and 3307831 transitions. [2021-06-05 22:51:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 22:51:57,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:57,326 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:57,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 22:51:57,541 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash -538949502, now seen corresponding path program 48 times [2021-06-05 22:51:57,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:57,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509505363] [2021-06-05 22:51:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:51:57,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:57,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509505363] [2021-06-05 22:51:57,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509505363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:57,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904683423] [2021-06-05 22:51:57,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:57,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:51:57,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:57,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:51:57,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:51:57,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904683423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:57,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:57,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-06-05 22:51:57,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376556568] [2021-06-05 22:51:57,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:51:57,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:57,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:51:57,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:51:57,734 INFO L87 Difference]: Start difference. First operand 669469 states and 3307831 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)