/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/test/easy1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:37:56,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:37:56,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:37:56,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:37:56,831 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 [2021-06-06 00:37:56,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:37:56,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:37:56,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:37:56,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:37:56,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:37:56,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:37:56,859 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:37:56,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:37:56,859 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:37:56,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:37:56,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:37:56,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:37:56,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:37:56,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:37:56,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:37:56,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:37:56,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:37:56,861 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:37:56,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:37:56,861 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:37:56,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:37:56,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:37:57,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:37:57,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:37:57,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:37:57,087 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:37:57,089 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:37:57,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl [2021-06-06 00:37:57,089 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl' [2021-06-06 00:37:57,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:37:57,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:37:57,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:37:57,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:37:57,121 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:37:57,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:37:57,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:37:57,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:37:57,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:37:57,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/1) ... [2021-06-06 00:37:57,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:37:57,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:37:57,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:37:57,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:37:57,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (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 [2021-06-06 00:37:57,201 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:37:57,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:37:57,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:37:57,202 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:37:57,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:37:57,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:37:57,202 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:37:57,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:37:57,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:37:57,203 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:37:57,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:37:57,292 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:37:57,292 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:37:57 BoogieIcfgContainer [2021-06-06 00:37:57,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:37:57,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:37:57,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:37:57,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:37:57,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:37:57" (1/2) ... [2021-06-06 00:37:57,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c70c10a and model type easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:37:57, skipping insertion in model container [2021-06-06 00:37:57,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:37:57" (2/2) ... [2021-06-06 00:37:57,297 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.bpl [2021-06-06 00:37:57,301 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:37:57,301 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:37:57,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:37:57,301 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:37:57,319 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-06 00:37:57,332 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-06 00:37:57,344 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:37:57,344 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:37:57,344 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:37:57,344 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:37:57,344 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:37:57,344 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:37:57,344 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:37:57,345 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:37:57,350 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-06 00:37:57,356 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-06 00:37:57,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:57,361 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:57,362 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash -64585265, now seen corresponding path program 1 times [2021-06-06 00:37:57,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:57,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038761933] [2021-06-06 00:37:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:57,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:57,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038761933] [2021-06-06 00:37:57,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038761933] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:37:57,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:37:57,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-06 00:37:57,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624143517] [2021-06-06 00:37:57,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:37:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:57,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:37:57,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:37:57,536 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:57,586 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-06-06 00:37:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:37:57,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-06 00:37:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:57,593 INFO L225 Difference]: With dead ends: 54 [2021-06-06 00:37:57,593 INFO L226 Difference]: Without dead ends: 47 [2021-06-06 00:37:57,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:37:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-06 00:37:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-06 00:37:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-06 00:37:57,624 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-06-06 00:37:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:57,625 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-06 00:37:57,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-06 00:37:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-06 00:37:57,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:57,627 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:57,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:37:57,627 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:57,633 INFO L82 PathProgramCache]: Analyzing trace with hash 732040657, now seen corresponding path program 1 times [2021-06-06 00:37:57,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:57,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110418958] [2021-06-06 00:37:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:57,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:57,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110418958] [2021-06-06 00:37:57,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110418958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:57,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099059594] [2021-06-06 00:37:57,677 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 [2021-06-06 00:37:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:57,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-06 00:37:57,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:57,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099059594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:57,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:57,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-06 00:37:57,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228532703] [2021-06-06 00:37:57,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:37:57,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:37:57,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:37:57,783 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:57,833 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2021-06-06 00:37:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:37:57,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-06 00:37:57,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:57,835 INFO L225 Difference]: With dead ends: 61 [2021-06-06 00:37:57,835 INFO L226 Difference]: Without dead ends: 61 [2021-06-06 00:37:57,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:37:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-06 00:37:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-06-06 00:37:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2021-06-06 00:37:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2021-06-06 00:37:57,847 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2021-06-06 00:37:57,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:57,848 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2021-06-06 00:37:57,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2021-06-06 00:37:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-06 00:37:57,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:57,849 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:58,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-06 00:37:58,057 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845965, now seen corresponding path program 1 times [2021-06-06 00:37:58,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:58,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93914775] [2021-06-06 00:37:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:58,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:58,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93914775] [2021-06-06 00:37:58,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93914775] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:37:58,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:37:58,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:37:58,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631077696] [2021-06-06 00:37:58,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:37:58,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:37:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:37:58,078 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:58,108 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-06-06 00:37:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:37:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-06 00:37:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:58,109 INFO L225 Difference]: With dead ends: 68 [2021-06-06 00:37:58,109 INFO L226 Difference]: Without dead ends: 63 [2021-06-06 00:37:58,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:37:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-06 00:37:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-06-06 00:37:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2021-06-06 00:37:58,113 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 13 [2021-06-06 00:37:58,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:58,114 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2021-06-06 00:37:58,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,114 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2021-06-06 00:37:58,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-06 00:37:58,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:58,114 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:58,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-06 00:37:58,115 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:58,115 INFO L82 PathProgramCache]: Analyzing trace with hash 169918105, now seen corresponding path program 2 times [2021-06-06 00:37:58,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:58,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599875911] [2021-06-06 00:37:58,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:58,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599875911] [2021-06-06 00:37:58,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599875911] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:37:58,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:37:58,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:37:58,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908941032] [2021-06-06 00:37:58,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:37:58,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:58,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:37:58,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:37:58,131 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:58,156 INFO L93 Difference]: Finished difference Result 48 states and 91 transitions. [2021-06-06 00:37:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:37:58,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-06 00:37:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:58,157 INFO L225 Difference]: With dead ends: 48 [2021-06-06 00:37:58,157 INFO L226 Difference]: Without dead ends: 48 [2021-06-06 00:37:58,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:37:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-06 00:37:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-06-06 00:37:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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) [2021-06-06 00:37:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-06-06 00:37:58,160 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2021-06-06 00:37:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:58,160 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-06-06 00:37:58,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-06-06 00:37:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-06 00:37:58,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:58,161 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:58,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-06 00:37:58,161 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:58,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1213979977, now seen corresponding path program 2 times [2021-06-06 00:37:58,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:58,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025515414] [2021-06-06 00:37:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:58,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:58,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025515414] [2021-06-06 00:37:58,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025515414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:37:58,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:37:58,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-06 00:37:58,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904599544] [2021-06-06 00:37:58,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:37:58,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:58,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:37:58,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:37:58,178 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:58,202 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-06-06 00:37:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:37:58,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-06 00:37:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:58,203 INFO L225 Difference]: With dead ends: 48 [2021-06-06 00:37:58,203 INFO L226 Difference]: Without dead ends: 46 [2021-06-06 00:37:58,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:37:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-06-06 00:37:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-06-06 00:37:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-06 00:37:58,205 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-06-06 00:37:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:58,206 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-06 00:37:58,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-06 00:37:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:37:58,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:58,206 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:58,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-06 00:37:58,207 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:58,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788977, now seen corresponding path program 1 times [2021-06-06 00:37:58,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:58,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942625904] [2021-06-06 00:37:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:58,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:58,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942625904] [2021-06-06 00:37:58,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942625904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:58,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700756870] [2021-06-06 00:37:58,263 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 [2021-06-06 00:37:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:58,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:37:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:58,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700756870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:58,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:58,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 7 [2021-06-06 00:37:58,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481096107] [2021-06-06 00:37:58,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:37:58,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:58,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:37:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:37:58,381 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:58,486 INFO L93 Difference]: Finished difference Result 129 states and 238 transitions. [2021-06-06 00:37:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:37:58,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:37:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:58,488 INFO L225 Difference]: With dead ends: 129 [2021-06-06 00:37:58,488 INFO L226 Difference]: Without dead ends: 122 [2021-06-06 00:37:58,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:37:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-06 00:37:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2021-06-06 00:37:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-06-06 00:37:58,504 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-06-06 00:37:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:58,504 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-06-06 00:37:58,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-06-06 00:37:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:37:58,505 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:58,505 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:58,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:58,706 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356559, now seen corresponding path program 2 times [2021-06-06 00:37:58,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:58,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211855440] [2021-06-06 00:37:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:58,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:58,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211855440] [2021-06-06 00:37:58,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211855440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:58,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523705871] [2021-06-06 00:37:58,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:58,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:37:58,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:37:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:37:58,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523705871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:37:58,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:37:58,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-06-06 00:37:58,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329238559] [2021-06-06 00:37:58,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:37:58,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:58,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:37:58,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:37:58,847 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:58,874 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-06-06 00:37:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:37:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:37:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:58,875 INFO L225 Difference]: With dead ends: 114 [2021-06-06 00:37:58,875 INFO L226 Difference]: Without dead ends: 107 [2021-06-06 00:37:58,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:37:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-06 00:37:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2021-06-06 00:37:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-06-06 00:37:58,878 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2021-06-06 00:37:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:58,878 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-06-06 00:37:58,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-06-06 00:37:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:37:58,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:58,879 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:59,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:59,093 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:59,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643123, now seen corresponding path program 3 times [2021-06-06 00:37:59,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:59,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841031392] [2021-06-06 00:37:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:59,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:59,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841031392] [2021-06-06 00:37:59,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841031392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:59,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193214864] [2021-06-06 00:37:59,124 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 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 [2021-06-06 00:37:59,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:37:59,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:59,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:37:59,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:59,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193214864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:59,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:59,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:37:59,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078482127] [2021-06-06 00:37:59,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:37:59,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:59,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:37:59,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:37:59,180 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:59,236 INFO L93 Difference]: Finished difference Result 146 states and 283 transitions. [2021-06-06 00:37:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:37:59,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:37:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:59,237 INFO L225 Difference]: With dead ends: 146 [2021-06-06 00:37:59,237 INFO L226 Difference]: Without dead ends: 135 [2021-06-06 00:37:59,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:37:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-06 00:37:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2021-06-06 00:37:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1485148514851486) internal successors, (217), 101 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 217 transitions. [2021-06-06 00:37:59,241 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 217 transitions. Word has length 17 [2021-06-06 00:37:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:59,241 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 217 transitions. [2021-06-06 00:37:59,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 217 transitions. [2021-06-06 00:37:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:37:59,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:59,242 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:59,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:59,461 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:59,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1376961195, now seen corresponding path program 4 times [2021-06-06 00:37:59,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:59,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374112480] [2021-06-06 00:37:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:59,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:59,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374112480] [2021-06-06 00:37:59,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374112480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:59,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164066410] [2021-06-06 00:37:59,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:37:59,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:37:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:59,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:37:59,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:59,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164066410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:59,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:59,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-06 00:37:59,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690281660] [2021-06-06 00:37:59,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:37:59,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:59,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:37:59,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:37:59,585 INFO L87 Difference]: Start difference. First operand 102 states and 217 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:59,630 INFO L93 Difference]: Finished difference Result 137 states and 266 transitions. [2021-06-06 00:37:59,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:37:59,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:37:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:59,631 INFO L225 Difference]: With dead ends: 137 [2021-06-06 00:37:59,631 INFO L226 Difference]: Without dead ends: 137 [2021-06-06 00:37:59,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:37:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-06 00:37:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2021-06-06 00:37:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 99 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 211 transitions. [2021-06-06 00:37:59,639 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 211 transitions. Word has length 17 [2021-06-06 00:37:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:59,639 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 211 transitions. [2021-06-06 00:37:59,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 211 transitions. [2021-06-06 00:37:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:37:59,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:59,643 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:37:59,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:37:59,849 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:37:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:37:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 397922747, now seen corresponding path program 5 times [2021-06-06 00:37:59,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:37:59,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71174284] [2021-06-06 00:37:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:37:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:37:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:59,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:37:59,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71174284] [2021-06-06 00:37:59,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71174284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:59,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853551769] [2021-06-06 00:37:59,877 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 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 [2021-06-06 00:37:59,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:37:59,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:37:59,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:37:59,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:59,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853551769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:59,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:59,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-06 00:37:59,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675379535] [2021-06-06 00:37:59,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:37:59,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:59,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:37:59,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:37:59,934 INFO L87 Difference]: Start difference. First operand 100 states and 211 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:37:59,975 INFO L93 Difference]: Finished difference Result 126 states and 250 transitions. [2021-06-06 00:37:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:37:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:37:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:37:59,976 INFO L225 Difference]: With dead ends: 126 [2021-06-06 00:37:59,976 INFO L226 Difference]: Without dead ends: 124 [2021-06-06 00:37:59,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:37:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-06 00:37:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-06-06 00:37:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.111111111111111) internal successors, (209), 99 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 209 transitions. [2021-06-06 00:37:59,979 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 209 transitions. Word has length 17 [2021-06-06 00:37:59,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:37:59,979 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 209 transitions. [2021-06-06 00:37:59,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:37:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 209 transitions. [2021-06-06 00:37:59,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:37:59,979 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:37:59,979 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:00,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:00,189 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:00,189 INFO L82 PathProgramCache]: Analyzing trace with hash 613173649, now seen corresponding path program 6 times [2021-06-06 00:38:00,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:00,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714718258] [2021-06-06 00:38:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:00,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:00,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714718258] [2021-06-06 00:38:00,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714718258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:00,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703574332] [2021-06-06 00:38:00,206 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 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 [2021-06-06 00:38:00,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:38:00,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:38:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:00,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703574332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:00,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:00,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-06 00:38:00,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954094622] [2021-06-06 00:38:00,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:38:00,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:38:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:38:00,311 INFO L87 Difference]: Start difference. First operand 100 states and 209 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:00,385 INFO L93 Difference]: Finished difference Result 174 states and 339 transitions. [2021-06-06 00:38:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:38:00,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:38:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:00,387 INFO L225 Difference]: With dead ends: 174 [2021-06-06 00:38:00,387 INFO L226 Difference]: Without dead ends: 174 [2021-06-06 00:38:00,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-06 00:38:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 109. [2021-06-06 00:38:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1666666666666665) internal successors, (234), 108 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 234 transitions. [2021-06-06 00:38:00,395 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 234 transitions. Word has length 17 [2021-06-06 00:38:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:00,396 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 234 transitions. [2021-06-06 00:38:00,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 234 transitions. [2021-06-06 00:38:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:38:00,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:00,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:00,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:00,613 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:00,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:00,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978957, now seen corresponding path program 7 times [2021-06-06 00:38:00,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:00,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957219466] [2021-06-06 00:38:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:00,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957219466] [2021-06-06 00:38:00,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957219466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050057422] [2021-06-06 00:38:00,630 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 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 [2021-06-06 00:38:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:38:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:00,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050057422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:00,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:00,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-06 00:38:00,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236280233] [2021-06-06 00:38:00,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:38:00,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:00,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:38:00,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:38:00,684 INFO L87 Difference]: Start difference. First operand 109 states and 234 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:00,724 INFO L93 Difference]: Finished difference Result 155 states and 313 transitions. [2021-06-06 00:38:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:38:00,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:38:00,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:00,725 INFO L225 Difference]: With dead ends: 155 [2021-06-06 00:38:00,725 INFO L226 Difference]: Without dead ends: 152 [2021-06-06 00:38:00,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-06 00:38:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2021-06-06 00:38:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-06-06 00:38:00,728 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-06-06 00:38:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:00,729 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-06-06 00:38:00,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-06-06 00:38:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:38:00,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:00,729 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:00,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-06 00:38:00,945 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash 51051097, now seen corresponding path program 8 times [2021-06-06 00:38:00,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:00,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133362902] [2021-06-06 00:38:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:00,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:00,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133362902] [2021-06-06 00:38:00,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133362902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:00,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291500204] [2021-06-06 00:38:00,966 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 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 [2021-06-06 00:38:00,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:38:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:38:00,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:01,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291500204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:01,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:01,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-06 00:38:01,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368420367] [2021-06-06 00:38:01,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:38:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:01,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:38:01,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:38:01,022 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:01,058 INFO L93 Difference]: Finished difference Result 160 states and 326 transitions. [2021-06-06 00:38:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:38:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:38:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:01,059 INFO L225 Difference]: With dead ends: 160 [2021-06-06 00:38:01,059 INFO L226 Difference]: Without dead ends: 160 [2021-06-06 00:38:01,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-06 00:38:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-06-06 00:38:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2241379310344827) internal successors, (258), 116 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 258 transitions. [2021-06-06 00:38:01,063 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 258 transitions. Word has length 17 [2021-06-06 00:38:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:01,063 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 258 transitions. [2021-06-06 00:38:01,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 258 transitions. [2021-06-06 00:38:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:38:01,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:01,063 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:01,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:01,273 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846985, now seen corresponding path program 9 times [2021-06-06 00:38:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:01,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635317198] [2021-06-06 00:38:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:01,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:01,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635317198] [2021-06-06 00:38:01,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635317198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:01,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780172235] [2021-06-06 00:38:01,302 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 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 [2021-06-06 00:38:01,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:38:01,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:01,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:38:01,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:01,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780172235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:01,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:01,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-06 00:38:01,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701762860] [2021-06-06 00:38:01,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:38:01,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:01,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:38:01,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:38:01,355 INFO L87 Difference]: Start difference. First operand 117 states and 258 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:01,403 INFO L93 Difference]: Finished difference Result 170 states and 342 transitions. [2021-06-06 00:38:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:38:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:38:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:01,405 INFO L225 Difference]: With dead ends: 170 [2021-06-06 00:38:01,405 INFO L226 Difference]: Without dead ends: 168 [2021-06-06 00:38:01,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-06 00:38:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2021-06-06 00:38:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2033898305084745) internal successors, (260), 118 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 260 transitions. [2021-06-06 00:38:01,411 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 260 transitions. Word has length 17 [2021-06-06 00:38:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:01,411 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 260 transitions. [2021-06-06 00:38:01,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 260 transitions. [2021-06-06 00:38:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:38:01,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:01,412 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:01,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:01,625 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:01,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142685, now seen corresponding path program 10 times [2021-06-06 00:38:01,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:01,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525233254] [2021-06-06 00:38:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:01,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:01,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525233254] [2021-06-06 00:38:01,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525233254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:01,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388160464] [2021-06-06 00:38:01,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:38:01,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:38:01,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:38:01,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:01,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388160464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:01,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:01,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:38:01,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784193606] [2021-06-06 00:38:01,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:38:01,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:01,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:38:01,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:38:01,696 INFO L87 Difference]: Start difference. First operand 119 states and 260 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:01,753 INFO L93 Difference]: Finished difference Result 152 states and 307 transitions. [2021-06-06 00:38:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:38:01,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:38:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:01,754 INFO L225 Difference]: With dead ends: 152 [2021-06-06 00:38:01,754 INFO L226 Difference]: Without dead ends: 152 [2021-06-06 00:38:01,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-06 00:38:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-06-06 00:38:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-06-06 00:38:01,757 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 17 [2021-06-06 00:38:01,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:01,757 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-06-06 00:38:01,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-06-06 00:38:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:38:01,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:01,757 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:01,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-06 00:38:01,973 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193251, now seen corresponding path program 11 times [2021-06-06 00:38:01,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:01,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358223688] [2021-06-06 00:38:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:01,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:01,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358223688] [2021-06-06 00:38:01,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358223688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:01,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97863608] [2021-06-06 00:38:01,993 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 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 [2021-06-06 00:38:02,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:38:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-06 00:38:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:02,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97863608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:02,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:02,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:38:02,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88605859] [2021-06-06 00:38:02,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:38:02,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:02,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:38:02,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:38:02,069 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:02,118 INFO L93 Difference]: Finished difference Result 167 states and 329 transitions. [2021-06-06 00:38:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:38:02,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:38:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:02,119 INFO L225 Difference]: With dead ends: 167 [2021-06-06 00:38:02,119 INFO L226 Difference]: Without dead ends: 161 [2021-06-06 00:38:02,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-06 00:38:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2021-06-06 00:38:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-06-06 00:38:02,122 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 17 [2021-06-06 00:38:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:02,122 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-06-06 00:38:02,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-06-06 00:38:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:38:02,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:02,122 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:02,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-06 00:38:02,329 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:02,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1030416975, now seen corresponding path program 12 times [2021-06-06 00:38:02,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:02,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24021513] [2021-06-06 00:38:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:02,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:02,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24021513] [2021-06-06 00:38:02,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24021513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:02,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962208747] [2021-06-06 00:38:02,376 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 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 [2021-06-06 00:38:02,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:38:02,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:02,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:38:02,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:02,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962208747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:02,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:02,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-06-06 00:38:02,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913187258] [2021-06-06 00:38:02,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:38:02,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:02,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:38:02,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:02,477 INFO L87 Difference]: Start difference. First operand 120 states and 256 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:38:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:02,622 INFO L93 Difference]: Finished difference Result 303 states and 601 transitions. [2021-06-06 00:38:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:38:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 19 [2021-06-06 00:38:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:02,623 INFO L225 Difference]: With dead ends: 303 [2021-06-06 00:38:02,623 INFO L226 Difference]: Without dead ends: 296 [2021-06-06 00:38:02,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:38:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-06 00:38:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 151. [2021-06-06 00:38:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2533333333333334) internal successors, (338), 150 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 338 transitions. [2021-06-06 00:38:02,626 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 338 transitions. Word has length 19 [2021-06-06 00:38:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:02,627 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 338 transitions. [2021-06-06 00:38:02,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-06-06 00:38:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 338 transitions. [2021-06-06 00:38:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:38:02,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:02,627 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:02,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-06 00:38:02,841 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1048750001, now seen corresponding path program 13 times [2021-06-06 00:38:02,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:02,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427342300] [2021-06-06 00:38:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:02,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:02,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427342300] [2021-06-06 00:38:02,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427342300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:02,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203656350] [2021-06-06 00:38:02,894 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 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 [2021-06-06 00:38:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:38:02,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:38:02,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203656350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:02,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:02,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-06 00:38:02,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207149559] [2021-06-06 00:38:02,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:38:02,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:38:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:02,958 INFO L87 Difference]: Start difference. First operand 151 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:03,081 INFO L93 Difference]: Finished difference Result 285 states and 591 transitions. [2021-06-06 00:38:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:38:03,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-06 00:38:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:03,083 INFO L225 Difference]: With dead ends: 285 [2021-06-06 00:38:03,083 INFO L226 Difference]: Without dead ends: 275 [2021-06-06 00:38:03,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:38:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-06 00:38:03,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-06-06 00:38:03,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-06-06 00:38:03,087 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 19 [2021-06-06 00:38:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:03,087 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-06-06 00:38:03,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-06-06 00:38:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:38:03,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:03,087 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:03,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:03,302 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:03,303 INFO L82 PathProgramCache]: Analyzing trace with hash -588981681, now seen corresponding path program 14 times [2021-06-06 00:38:03,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:03,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148678596] [2021-06-06 00:38:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:03,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:03,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148678596] [2021-06-06 00:38:03,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148678596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:03,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486035037] [2021-06-06 00:38:03,355 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 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 [2021-06-06 00:38:03,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:38:03,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:38:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:38:03,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486035037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:03,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:03,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-06-06 00:38:03,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948678256] [2021-06-06 00:38:03,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:38:03,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:03,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:38:03,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:03,444 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-06-06 00:38:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:03,595 INFO L93 Difference]: Finished difference Result 359 states and 743 transitions. [2021-06-06 00:38:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:38:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 19 [2021-06-06 00:38:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:03,596 INFO L225 Difference]: With dead ends: 359 [2021-06-06 00:38:03,596 INFO L226 Difference]: Without dead ends: 352 [2021-06-06 00:38:03,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:38:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-06 00:38:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-06-06 00:38:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3175355450236967) internal successors, (489), 211 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 489 transitions. [2021-06-06 00:38:03,601 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 489 transitions. Word has length 19 [2021-06-06 00:38:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:03,601 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 489 transitions. [2021-06-06 00:38:03,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-06-06 00:38:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 489 transitions. [2021-06-06 00:38:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:03,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:03,602 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:03,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:03,813 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash -617233839, now seen corresponding path program 15 times [2021-06-06 00:38:03,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:03,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102069731] [2021-06-06 00:38:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:03,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:03,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102069731] [2021-06-06 00:38:03,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102069731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:03,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138560524] [2021-06-06 00:38:03,842 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 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 [2021-06-06 00:38:03,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:38:03,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:03,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-06 00:38:03,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138560524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:03,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:03,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-06 00:38:03,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340628153] [2021-06-06 00:38:03,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:38:03,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:38:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:38:03,962 INFO L87 Difference]: Start difference. First operand 212 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:04,260 INFO L93 Difference]: Finished difference Result 389 states and 854 transitions. [2021-06-06 00:38:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:38:04,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:04,262 INFO L225 Difference]: With dead ends: 389 [2021-06-06 00:38:04,262 INFO L226 Difference]: Without dead ends: 317 [2021-06-06 00:38:04,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:38:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-06 00:38:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 221. [2021-06-06 00:38:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.3181818181818183) internal successors, (510), 220 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 510 transitions. [2021-06-06 00:38:04,266 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 510 transitions. Word has length 21 [2021-06-06 00:38:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:04,266 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 510 transitions. [2021-06-06 00:38:04,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 510 transitions. [2021-06-06 00:38:04,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:04,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:04,267 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:04,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:04,481 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:04,481 INFO L82 PathProgramCache]: Analyzing trace with hash -380162493, now seen corresponding path program 16 times [2021-06-06 00:38:04,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:04,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498119826] [2021-06-06 00:38:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:04,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:04,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498119826] [2021-06-06 00:38:04,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498119826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:04,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035235528] [2021-06-06 00:38:04,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:38:04,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:38:04,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:04,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:04,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:04,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035235528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:04,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:04,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:38:04,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099563663] [2021-06-06 00:38:04,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:38:04,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:04,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:38:04,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:38:04,564 INFO L87 Difference]: Start difference. First operand 221 states and 510 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:04,614 INFO L93 Difference]: Finished difference Result 361 states and 777 transitions. [2021-06-06 00:38:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:38:04,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:04,615 INFO L225 Difference]: With dead ends: 361 [2021-06-06 00:38:04,615 INFO L226 Difference]: Without dead ends: 361 [2021-06-06 00:38:04,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-06 00:38:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2021-06-06 00:38:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.3463035019455254) internal successors, (603), 257 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 603 transitions. [2021-06-06 00:38:04,620 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 603 transitions. Word has length 21 [2021-06-06 00:38:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:04,620 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 603 transitions. [2021-06-06 00:38:04,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 603 transitions. [2021-06-06 00:38:04,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:04,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:04,621 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:04,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-06 00:38:04,837 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash 492603451, now seen corresponding path program 17 times [2021-06-06 00:38:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:04,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575032970] [2021-06-06 00:38:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:04,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:04,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575032970] [2021-06-06 00:38:04,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575032970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:04,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391080492] [2021-06-06 00:38:04,855 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 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 [2021-06-06 00:38:04,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:38:04,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:04,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:04,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391080492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:04,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:04,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:38:04,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686856035] [2021-06-06 00:38:04,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:38:04,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:04,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:38:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:38:04,924 INFO L87 Difference]: Start difference. First operand 258 states and 603 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:04,977 INFO L93 Difference]: Finished difference Result 377 states and 812 transitions. [2021-06-06 00:38:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:38:04,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:04,979 INFO L225 Difference]: With dead ends: 377 [2021-06-06 00:38:04,979 INFO L226 Difference]: Without dead ends: 377 [2021-06-06 00:38:04,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-06 00:38:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 280. [2021-06-06 00:38:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.3405017921146953) internal successors, (653), 279 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 653 transitions. [2021-06-06 00:38:04,984 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 653 transitions. Word has length 21 [2021-06-06 00:38:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:04,984 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 653 transitions. [2021-06-06 00:38:04,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 653 transitions. [2021-06-06 00:38:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:04,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:04,985 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:05,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-06 00:38:05,201 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486153, now seen corresponding path program 18 times [2021-06-06 00:38:05,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:05,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921307086] [2021-06-06 00:38:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:05,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:05,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921307086] [2021-06-06 00:38:05,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921307086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:05,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858647403] [2021-06-06 00:38:05,220 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 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 [2021-06-06 00:38:05,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:38:05,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:05,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858647403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:05,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:05,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:38:05,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369958802] [2021-06-06 00:38:05,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:38:05,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:38:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:38:05,274 INFO L87 Difference]: Start difference. First operand 280 states and 653 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:05,339 INFO L93 Difference]: Finished difference Result 352 states and 762 transitions. [2021-06-06 00:38:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:38:05,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:05,340 INFO L225 Difference]: With dead ends: 352 [2021-06-06 00:38:05,340 INFO L226 Difference]: Without dead ends: 348 [2021-06-06 00:38:05,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-06 00:38:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2021-06-06 00:38:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.325102880658436) internal successors, (565), 243 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 565 transitions. [2021-06-06 00:38:05,345 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 565 transitions. Word has length 21 [2021-06-06 00:38:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:05,345 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 565 transitions. [2021-06-06 00:38:05,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 565 transitions. [2021-06-06 00:38:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:05,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:05,345 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:05,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-06 00:38:05,561 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134877, now seen corresponding path program 19 times [2021-06-06 00:38:05,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:05,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871371697] [2021-06-06 00:38:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:05,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871371697] [2021-06-06 00:38:05,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871371697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149687607] [2021-06-06 00:38:05,585 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 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 [2021-06-06 00:38:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:05,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:05,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:05,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149687607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:05,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:05,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-06 00:38:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999378880] [2021-06-06 00:38:05,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:38:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:38:05,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:05,630 INFO L87 Difference]: Start difference. First operand 244 states and 565 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:05,696 INFO L93 Difference]: Finished difference Result 304 states and 656 transitions. [2021-06-06 00:38:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:38:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:05,697 INFO L225 Difference]: With dead ends: 304 [2021-06-06 00:38:05,697 INFO L226 Difference]: Without dead ends: 298 [2021-06-06 00:38:05,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-06 00:38:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2021-06-06 00:38:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3102040816326532) internal successors, (566), 245 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 566 transitions. [2021-06-06 00:38:05,701 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 566 transitions. Word has length 21 [2021-06-06 00:38:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:05,701 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 566 transitions. [2021-06-06 00:38:05,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 566 transitions. [2021-06-06 00:38:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:05,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:05,702 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:05,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-06 00:38:05,917 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash 540638335, now seen corresponding path program 20 times [2021-06-06 00:38:05,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:05,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222339939] [2021-06-06 00:38:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:05,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:05,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222339939] [2021-06-06 00:38:05,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222339939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:05,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183829429] [2021-06-06 00:38:05,938 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 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 [2021-06-06 00:38:05,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:38:05,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:05,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:06,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183829429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:06,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:06,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-06 00:38:06,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949595674] [2021-06-06 00:38:06,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:38:06,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:06,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:38:06,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:06,000 INFO L87 Difference]: Start difference. First operand 246 states and 566 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:06,058 INFO L93 Difference]: Finished difference Result 309 states and 671 transitions. [2021-06-06 00:38:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:38:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:06,059 INFO L225 Difference]: With dead ends: 309 [2021-06-06 00:38:06,059 INFO L226 Difference]: Without dead ends: 309 [2021-06-06 00:38:06,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-06 00:38:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 248. [2021-06-06 00:38:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3076923076923075) internal successors, (570), 247 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 570 transitions. [2021-06-06 00:38:06,063 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 570 transitions. Word has length 21 [2021-06-06 00:38:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:06,063 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 570 transitions. [2021-06-06 00:38:06,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 570 transitions. [2021-06-06 00:38:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:06,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:06,064 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:06,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-06 00:38:06,279 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:06,280 INFO L82 PathProgramCache]: Analyzing trace with hash -51672517, now seen corresponding path program 21 times [2021-06-06 00:38:06,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:06,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701842926] [2021-06-06 00:38:06,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:06,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:06,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701842926] [2021-06-06 00:38:06,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701842926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:06,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336830566] [2021-06-06 00:38:06,298 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 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 [2021-06-06 00:38:06,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:38:06,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:38:06,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336830566] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:38:06,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:38:06,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-06-06 00:38:06,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961665883] [2021-06-06 00:38:06,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:38:06,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:06,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:38:06,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:06,396 INFO L87 Difference]: Start difference. First operand 248 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:06,467 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-06-06 00:38:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:38:06,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:06,468 INFO L225 Difference]: With dead ends: 382 [2021-06-06 00:38:06,468 INFO L226 Difference]: Without dead ends: 232 [2021-06-06 00:38:06,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:38:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-06 00:38:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-06-06 00:38:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.7758620689655173) internal successors, (309), 174 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 309 transitions. [2021-06-06 00:38:06,471 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 309 transitions. Word has length 21 [2021-06-06 00:38:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:06,471 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 309 transitions. [2021-06-06 00:38:06,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 309 transitions. [2021-06-06 00:38:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:06,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:06,471 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:06,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:06,687 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2113872589, now seen corresponding path program 22 times [2021-06-06 00:38:06,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:06,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171115064] [2021-06-06 00:38:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:06,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:06,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:06,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171115064] [2021-06-06 00:38:06,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171115064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:06,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793389364] [2021-06-06 00:38:06,707 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 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 [2021-06-06 00:38:06,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:38:06,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:06,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:06,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:06,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793389364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:06,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:06,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-06 00:38:06,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746905531] [2021-06-06 00:38:06,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:38:06,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:06,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:38:06,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:06,757 INFO L87 Difference]: Start difference. First operand 175 states and 309 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:06,819 INFO L93 Difference]: Finished difference Result 268 states and 454 transitions. [2021-06-06 00:38:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:38:06,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:06,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:06,820 INFO L225 Difference]: With dead ends: 268 [2021-06-06 00:38:06,820 INFO L226 Difference]: Without dead ends: 262 [2021-06-06 00:38:06,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-06 00:38:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 176. [2021-06-06 00:38:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.782857142857143) internal successors, (312), 175 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 312 transitions. [2021-06-06 00:38:06,822 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 312 transitions. Word has length 21 [2021-06-06 00:38:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:06,823 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 312 transitions. [2021-06-06 00:38:06,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 312 transitions. [2021-06-06 00:38:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:06,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:06,823 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:07,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-06 00:38:07,039 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:07,039 INFO L82 PathProgramCache]: Analyzing trace with hash 913637529, now seen corresponding path program 23 times [2021-06-06 00:38:07,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:07,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689322486] [2021-06-06 00:38:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:07,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689322486] [2021-06-06 00:38:07,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689322486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:07,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700387853] [2021-06-06 00:38:07,066 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 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 [2021-06-06 00:38:07,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:38:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:07,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:07,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700387853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:07,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:07,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:38:07,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232989788] [2021-06-06 00:38:07,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:38:07,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:38:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:38:07,113 INFO L87 Difference]: Start difference. First operand 176 states and 312 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:07,179 INFO L93 Difference]: Finished difference Result 257 states and 435 transitions. [2021-06-06 00:38:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:38:07,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:07,180 INFO L225 Difference]: With dead ends: 257 [2021-06-06 00:38:07,180 INFO L226 Difference]: Without dead ends: 247 [2021-06-06 00:38:07,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:38:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-06 00:38:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 179. [2021-06-06 00:38:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.7640449438202248) internal successors, (314), 178 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 314 transitions. [2021-06-06 00:38:07,183 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 314 transitions. Word has length 21 [2021-06-06 00:38:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:07,183 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 314 transitions. [2021-06-06 00:38:07,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 314 transitions. [2021-06-06 00:38:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:07,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:07,184 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:07,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:07,397 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:07,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:07,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1408084783, now seen corresponding path program 24 times [2021-06-06 00:38:07,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:07,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961680291] [2021-06-06 00:38:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:07,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:07,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961680291] [2021-06-06 00:38:07,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961680291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:07,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345197550] [2021-06-06 00:38:07,419 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 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 [2021-06-06 00:38:07,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:38:07,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:07,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:07,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:07,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345197550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:07,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:07,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-06 00:38:07,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020167929] [2021-06-06 00:38:07,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:38:07,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:38:07,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:07,467 INFO L87 Difference]: Start difference. First operand 179 states and 314 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:07,544 INFO L93 Difference]: Finished difference Result 248 states and 411 transitions. [2021-06-06 00:38:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:38:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:07,545 INFO L225 Difference]: With dead ends: 248 [2021-06-06 00:38:07,545 INFO L226 Difference]: Without dead ends: 239 [2021-06-06 00:38:07,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-06 00:38:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 191. [2021-06-06 00:38:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.7526315789473683) internal successors, (333), 190 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 333 transitions. [2021-06-06 00:38:07,549 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 333 transitions. Word has length 21 [2021-06-06 00:38:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:07,549 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 333 transitions. [2021-06-06 00:38:07,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 333 transitions. [2021-06-06 00:38:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:07,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:07,550 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:07,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-06 00:38:07,761 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash 791144921, now seen corresponding path program 25 times [2021-06-06 00:38:07,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:07,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123276074] [2021-06-06 00:38:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:07,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:07,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123276074] [2021-06-06 00:38:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123276074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:07,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041298419] [2021-06-06 00:38:07,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:38:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:07,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:07,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:07,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041298419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:07,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:07,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:38:07,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73060989] [2021-06-06 00:38:07,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:38:07,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:38:07,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:38:07,834 INFO L87 Difference]: Start difference. First operand 191 states and 333 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:07,880 INFO L93 Difference]: Finished difference Result 270 states and 458 transitions. [2021-06-06 00:38:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:38:07,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:07,881 INFO L225 Difference]: With dead ends: 270 [2021-06-06 00:38:07,881 INFO L226 Difference]: Without dead ends: 270 [2021-06-06 00:38:07,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-06 00:38:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 200. [2021-06-06 00:38:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 199 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 352 transitions. [2021-06-06 00:38:07,884 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 352 transitions. Word has length 21 [2021-06-06 00:38:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:07,884 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 352 transitions. [2021-06-06 00:38:07,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 352 transitions. [2021-06-06 00:38:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:07,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:07,885 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:08,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:08,098 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1493950229, now seen corresponding path program 26 times [2021-06-06 00:38:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:08,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516602401] [2021-06-06 00:38:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:08,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:08,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516602401] [2021-06-06 00:38:08,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516602401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:08,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393406404] [2021-06-06 00:38:08,116 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 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 [2021-06-06 00:38:08,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:38:08,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:08,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:08,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393406404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:08,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:08,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:38:08,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111177151] [2021-06-06 00:38:08,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:38:08,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:08,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:38:08,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:38:08,178 INFO L87 Difference]: Start difference. First operand 200 states and 352 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:08,230 INFO L93 Difference]: Finished difference Result 240 states and 405 transitions. [2021-06-06 00:38:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:38:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:08,231 INFO L225 Difference]: With dead ends: 240 [2021-06-06 00:38:08,231 INFO L226 Difference]: Without dead ends: 237 [2021-06-06 00:38:08,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-06 00:38:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-06-06 00:38:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.760204081632653) internal successors, (345), 196 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 345 transitions. [2021-06-06 00:38:08,234 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 345 transitions. Word has length 21 [2021-06-06 00:38:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:08,234 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 345 transitions. [2021-06-06 00:38:08,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 345 transitions. [2021-06-06 00:38:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:08,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:08,234 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:08,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-06 00:38:08,441 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:08,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 229022369, now seen corresponding path program 27 times [2021-06-06 00:38:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:08,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72810578] [2021-06-06 00:38:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:08,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:08,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72810578] [2021-06-06 00:38:08,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72810578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:08,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465752768] [2021-06-06 00:38:08,461 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 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 [2021-06-06 00:38:08,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:38:08,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:08,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-06 00:38:08,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465752768] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:38:08,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:38:08,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-06-06 00:38:08,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226766419] [2021-06-06 00:38:08,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:38:08,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:08,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:38:08,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:08,543 INFO L87 Difference]: Start difference. First operand 197 states and 345 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:08,571 INFO L93 Difference]: Finished difference Result 224 states and 389 transitions. [2021-06-06 00:38:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:38:08,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:08,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:08,572 INFO L225 Difference]: With dead ends: 224 [2021-06-06 00:38:08,572 INFO L226 Difference]: Without dead ends: 199 [2021-06-06 00:38:08,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:38:08,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-06 00:38:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-06-06 00:38:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.7091836734693877) internal successors, (335), 196 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 335 transitions. [2021-06-06 00:38:08,576 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 335 transitions. Word has length 21 [2021-06-06 00:38:08,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:08,576 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 335 transitions. [2021-06-06 00:38:08,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 335 transitions. [2021-06-06 00:38:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:38:08,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:08,577 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:08,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:08,785 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1365207641, now seen corresponding path program 28 times [2021-06-06 00:38:08,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:08,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112232299] [2021-06-06 00:38:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:08,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:08,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112232299] [2021-06-06 00:38:08,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112232299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:08,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255861516] [2021-06-06 00:38:08,803 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 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 [2021-06-06 00:38:08,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:38:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:08,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:08,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:08,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255861516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:08,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:08,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-06 00:38:08,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069866211] [2021-06-06 00:38:08,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:38:08,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:08,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:38:08,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:38:08,862 INFO L87 Difference]: Start difference. First operand 197 states and 335 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:08,907 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2021-06-06 00:38:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:38:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:38:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:08,908 INFO L225 Difference]: With dead ends: 234 [2021-06-06 00:38:08,908 INFO L226 Difference]: Without dead ends: 234 [2021-06-06 00:38:08,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-06 00:38:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-06-06 00:38:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.6974358974358974) internal successors, (331), 195 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 331 transitions. [2021-06-06 00:38:08,913 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 331 transitions. Word has length 21 [2021-06-06 00:38:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:08,913 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 331 transitions. [2021-06-06 00:38:08,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 331 transitions. [2021-06-06 00:38:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:38:08,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:08,914 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:09,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-06 00:38:09,129 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1990008773, now seen corresponding path program 29 times [2021-06-06 00:38:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:09,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316997318] [2021-06-06 00:38:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:09,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:09,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316997318] [2021-06-06 00:38:09,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316997318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:09,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491686509] [2021-06-06 00:38:09,193 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 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 [2021-06-06 00:38:09,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:38:09,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:38:09,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:09,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491686509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:09,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:09,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-06-06 00:38:09,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383838528] [2021-06-06 00:38:09,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:38:09,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:09,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:38:09,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:38:09,289 INFO L87 Difference]: Start difference. First operand 196 states and 331 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:09,498 INFO L93 Difference]: Finished difference Result 337 states and 533 transitions. [2021-06-06 00:38:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:38:09,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:38:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:09,499 INFO L225 Difference]: With dead ends: 337 [2021-06-06 00:38:09,499 INFO L226 Difference]: Without dead ends: 330 [2021-06-06 00:38:09,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:38:09,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-06 00:38:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 213. [2021-06-06 00:38:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.7075471698113207) internal successors, (362), 212 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 362 transitions. [2021-06-06 00:38:09,502 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 362 transitions. Word has length 23 [2021-06-06 00:38:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:09,502 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 362 transitions. [2021-06-06 00:38:09,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 362 transitions. [2021-06-06 00:38:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:38:09,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:09,503 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:09,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:09,717 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1910209031, now seen corresponding path program 30 times [2021-06-06 00:38:09,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:09,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799306873] [2021-06-06 00:38:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:09,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:09,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799306873] [2021-06-06 00:38:09,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799306873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:09,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430759632] [2021-06-06 00:38:09,783 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 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 [2021-06-06 00:38:09,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:38:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:09,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:38:09,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:38:09,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430759632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:09,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:09,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-06 00:38:09,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009108587] [2021-06-06 00:38:09,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:38:09,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:09,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:38:09,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:09,853 INFO L87 Difference]: Start difference. First operand 213 states and 362 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:10,041 INFO L93 Difference]: Finished difference Result 390 states and 642 transitions. [2021-06-06 00:38:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:38:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:38:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:10,042 INFO L225 Difference]: With dead ends: 390 [2021-06-06 00:38:10,042 INFO L226 Difference]: Without dead ends: 383 [2021-06-06 00:38:10,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:38:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-06 00:38:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 240. [2021-06-06 00:38:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.7447698744769875) internal successors, (417), 239 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 417 transitions. [2021-06-06 00:38:10,046 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 417 transitions. Word has length 23 [2021-06-06 00:38:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:10,046 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 417 transitions. [2021-06-06 00:38:10,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 417 transitions. [2021-06-06 00:38:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:38:10,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:10,046 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:10,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-06 00:38:10,247 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:10,247 INFO L82 PathProgramCache]: Analyzing trace with hash -89900555, now seen corresponding path program 31 times [2021-06-06 00:38:10,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:10,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714382002] [2021-06-06 00:38:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:10,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:10,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714382002] [2021-06-06 00:38:10,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714382002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:10,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236794509] [2021-06-06 00:38:10,293 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:38:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:10,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:38:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:38:10,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236794509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:10,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:10,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-06-06 00:38:10,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390870172] [2021-06-06 00:38:10,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:38:10,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:10,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:38:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:38:10,369 INFO L87 Difference]: Start difference. First operand 240 states and 417 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:10,539 INFO L93 Difference]: Finished difference Result 494 states and 827 transitions. [2021-06-06 00:38:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:38:10,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:38:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:10,541 INFO L225 Difference]: With dead ends: 494 [2021-06-06 00:38:10,541 INFO L226 Difference]: Without dead ends: 487 [2021-06-06 00:38:10,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:38:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-06 00:38:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 281. [2021-06-06 00:38:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.7535714285714286) internal successors, (491), 280 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 491 transitions. [2021-06-06 00:38:10,545 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 491 transitions. Word has length 23 [2021-06-06 00:38:10,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:10,545 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 491 transitions. [2021-06-06 00:38:10,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 491 transitions. [2021-06-06 00:38:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:38:10,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:10,546 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:10,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-06 00:38:10,753 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:10,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:10,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1174855409, now seen corresponding path program 32 times [2021-06-06 00:38:10,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:10,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91500038] [2021-06-06 00:38:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:10,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91500038] [2021-06-06 00:38:10,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91500038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:10,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151595115] [2021-06-06 00:38:10,810 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 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 [2021-06-06 00:38:10,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:38:10,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:10,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-06 00:38:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:38:10,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151595115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:10,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:10,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-06-06 00:38:10,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364701379] [2021-06-06 00:38:10,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:38:10,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:38:10,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:38:10,903 INFO L87 Difference]: Start difference. First operand 281 states and 491 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:11,086 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2021-06-06 00:38:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:38:11,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:38:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:11,087 INFO L225 Difference]: With dead ends: 505 [2021-06-06 00:38:11,087 INFO L226 Difference]: Without dead ends: 498 [2021-06-06 00:38:11,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:38:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-06 00:38:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-06-06 00:38:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.7396449704142012) internal successors, (588), 338 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 588 transitions. [2021-06-06 00:38:11,092 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 588 transitions. Word has length 23 [2021-06-06 00:38:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:11,092 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 588 transitions. [2021-06-06 00:38:11,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 588 transitions. [2021-06-06 00:38:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:38:11,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:11,092 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:11,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-06 00:38:11,308 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:11,308 INFO L82 PathProgramCache]: Analyzing trace with hash -508289285, now seen corresponding path program 33 times [2021-06-06 00:38:11,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:11,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795604949] [2021-06-06 00:38:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:11,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:11,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795604949] [2021-06-06 00:38:11,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795604949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:11,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008733721] [2021-06-06 00:38:11,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:38:11,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:38:11,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-06 00:38:11,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008733721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:11,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:11,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-06 00:38:11,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673319334] [2021-06-06 00:38:11,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:38:11,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:38:11,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:38:11,442 INFO L87 Difference]: Start difference. First operand 339 states and 588 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:11,724 INFO L93 Difference]: Finished difference Result 383 states and 645 transitions. [2021-06-06 00:38:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:38:11,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:38:11,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:11,725 INFO L225 Difference]: With dead ends: 383 [2021-06-06 00:38:11,725 INFO L226 Difference]: Without dead ends: 249 [2021-06-06 00:38:11,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:38:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-06 00:38:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-06-06 00:38:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.7298387096774193) internal successors, (429), 248 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 429 transitions. [2021-06-06 00:38:11,732 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 429 transitions. Word has length 25 [2021-06-06 00:38:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:11,732 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 429 transitions. [2021-06-06 00:38:11,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 429 transitions. [2021-06-06 00:38:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:38:11,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:11,733 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:11,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-06 00:38:11,948 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2072797355, now seen corresponding path program 34 times [2021-06-06 00:38:11,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:11,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46022445] [2021-06-06 00:38:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:11,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:11,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46022445] [2021-06-06 00:38:11,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46022445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:11,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334682011] [2021-06-06 00:38:11,976 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 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 [2021-06-06 00:38:11,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:38:11,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:11,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:38:11,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:12,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334682011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:12,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:12,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-06 00:38:12,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14498667] [2021-06-06 00:38:12,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:38:12,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:12,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:38:12,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:12,040 INFO L87 Difference]: Start difference. First operand 249 states and 429 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-06-06 00:38:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:12,117 INFO L93 Difference]: Finished difference Result 352 states and 595 transitions. [2021-06-06 00:38:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:38:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 [2021-06-06 00:38:12,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:12,118 INFO L225 Difference]: With dead ends: 352 [2021-06-06 00:38:12,118 INFO L226 Difference]: Without dead ends: 352 [2021-06-06 00:38:12,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:38:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-06 00:38:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 234. [2021-06-06 00:38:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.7124463519313304) internal successors, (399), 233 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 399 transitions. [2021-06-06 00:38:12,121 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 399 transitions. Word has length 25 [2021-06-06 00:38:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:12,121 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 399 transitions. [2021-06-06 00:38:12,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-06-06 00:38:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 399 transitions. [2021-06-06 00:38:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:38:12,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:12,122 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:12,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-06 00:38:12,337 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:12,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2069719407, now seen corresponding path program 35 times [2021-06-06 00:38:12,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:12,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613894243] [2021-06-06 00:38:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:12,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613894243] [2021-06-06 00:38:12,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613894243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429928406] [2021-06-06 00:38:12,368 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-06 00:38:12,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:38:12,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:12,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:38:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:12,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429928406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:12,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:12,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-06 00:38:12,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93366727] [2021-06-06 00:38:12,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:38:12,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:12,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:38:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:38:12,422 INFO L87 Difference]: Start difference. First operand 234 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-06-06 00:38:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:12,494 INFO L93 Difference]: Finished difference Result 338 states and 551 transitions. [2021-06-06 00:38:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:38:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 [2021-06-06 00:38:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:12,496 INFO L225 Difference]: With dead ends: 338 [2021-06-06 00:38:12,496 INFO L226 Difference]: Without dead ends: 323 [2021-06-06 00:38:12,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:38:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-06 00:38:12,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-06-06 00:38:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.7041666666666666) internal successors, (409), 240 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 409 transitions. [2021-06-06 00:38:12,499 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 409 transitions. Word has length 25 [2021-06-06 00:38:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:12,499 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 409 transitions. [2021-06-06 00:38:12,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-06-06 00:38:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 409 transitions. [2021-06-06 00:38:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:38:12,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:12,499 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:12,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-06 00:38:12,705 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash 417917337, now seen corresponding path program 36 times [2021-06-06 00:38:12,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:12,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293808196] [2021-06-06 00:38:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:12,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:12,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293808196] [2021-06-06 00:38:12,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293808196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:12,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84052482] [2021-06-06 00:38:12,728 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 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 [2021-06-06 00:38:12,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:38:12,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:12,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:38:12,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:12,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84052482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:12,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:12,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:38:12,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903166236] [2021-06-06 00:38:12,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:38:12,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:12,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:38:12,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:38:12,802 INFO L87 Difference]: Start difference. First operand 241 states and 409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:38:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:12,861 INFO L93 Difference]: Finished difference Result 346 states and 575 transitions. [2021-06-06 00:38:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:38:12,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-06-06 00:38:12,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:12,862 INFO L225 Difference]: With dead ends: 346 [2021-06-06 00:38:12,862 INFO L226 Difference]: Without dead ends: 346 [2021-06-06 00:38:12,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:38:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-06 00:38:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 234. [2021-06-06 00:38:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.6866952789699572) internal successors, (393), 233 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:12,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 393 transitions. [2021-06-06 00:38:12,865 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 393 transitions. Word has length 25 [2021-06-06 00:38:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:12,865 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 393 transitions. [2021-06-06 00:38:12,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:38:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 393 transitions. [2021-06-06 00:38:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:38:12,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:12,866 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:13,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-06 00:38:13,081 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1503952853, now seen corresponding path program 37 times [2021-06-06 00:38:13,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:13,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815309636] [2021-06-06 00:38:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:13,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:13,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815309636] [2021-06-06 00:38:13,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815309636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:13,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591370396] [2021-06-06 00:38:13,106 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 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 [2021-06-06 00:38:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:38:13,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:13,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591370396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:13,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:13,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:38:13,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792772702] [2021-06-06 00:38:13,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:38:13,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:13,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:38:13,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:38:13,165 INFO L87 Difference]: Start difference. First operand 234 states and 393 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:38:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:13,225 INFO L93 Difference]: Finished difference Result 281 states and 454 transitions. [2021-06-06 00:38:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:38:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 [2021-06-06 00:38:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:13,226 INFO L225 Difference]: With dead ends: 281 [2021-06-06 00:38:13,226 INFO L226 Difference]: Without dead ends: 272 [2021-06-06 00:38:13,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:38:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-06 00:38:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 225. [2021-06-06 00:38:13,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6741071428571428) internal successors, (375), 224 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 375 transitions. [2021-06-06 00:38:13,229 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 375 transitions. Word has length 25 [2021-06-06 00:38:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:13,229 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 375 transitions. [2021-06-06 00:38:13,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-06-06 00:38:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 375 transitions. [2021-06-06 00:38:13,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:38:13,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:13,229 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:13,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:13,441 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:13,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2087332515, now seen corresponding path program 38 times [2021-06-06 00:38:13,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:13,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031331995] [2021-06-06 00:38:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:13,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:13,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031331995] [2021-06-06 00:38:13,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031331995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:13,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301707641] [2021-06-06 00:38:13,459 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 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 [2021-06-06 00:38:13,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:38:13,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:13,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:38:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:38:13,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301707641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:13,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:13,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-06 00:38:13,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444155758] [2021-06-06 00:38:13,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:38:13,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:38:13,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:38:13,542 INFO L87 Difference]: Start difference. First operand 225 states and 375 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-06-06 00:38:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:13,586 INFO L93 Difference]: Finished difference Result 262 states and 421 transitions. [2021-06-06 00:38:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:38:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 [2021-06-06 00:38:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:13,588 INFO L225 Difference]: With dead ends: 262 [2021-06-06 00:38:13,588 INFO L226 Difference]: Without dead ends: 262 [2021-06-06 00:38:13,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:38:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-06 00:38:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 204. [2021-06-06 00:38:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.6600985221674878) internal successors, (337), 203 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 337 transitions. [2021-06-06 00:38:13,591 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 337 transitions. Word has length 25 [2021-06-06 00:38:13,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:13,592 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 337 transitions. [2021-06-06 00:38:13,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-06-06 00:38:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 337 transitions. [2021-06-06 00:38:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:38:13,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:13,593 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:13,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:13,808 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:13,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1140061405, now seen corresponding path program 39 times [2021-06-06 00:38:13,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:13,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319889049] [2021-06-06 00:38:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:13,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:13,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319889049] [2021-06-06 00:38:13,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319889049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:13,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954891892] [2021-06-06 00:38:13,829 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 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 [2021-06-06 00:38:13,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:38:13,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:13,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:13,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-06 00:38:13,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954891892] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:38:13,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:38:13,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-06-06 00:38:13,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456053528] [2021-06-06 00:38:13,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:38:13,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:13,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:38:13,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:38:13,909 INFO L87 Difference]: Start difference. First operand 204 states and 337 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:13,957 INFO L93 Difference]: Finished difference Result 211 states and 345 transitions. [2021-06-06 00:38:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:38:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:38:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:13,957 INFO L225 Difference]: With dead ends: 211 [2021-06-06 00:38:13,957 INFO L226 Difference]: Without dead ends: 39 [2021-06-06 00:38:13,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:38:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-06 00:38:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-06-06 00:38:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-06-06 00:38:13,958 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 25 [2021-06-06 00:38:13,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:13,958 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-06-06 00:38:13,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-06-06 00:38:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:38:13,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:13,958 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:14,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:14,159 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:14,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1938530999, now seen corresponding path program 40 times [2021-06-06 00:38:14,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:14,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575964832] [2021-06-06 00:38:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:14,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:14,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575964832] [2021-06-06 00:38:14,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575964832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:14,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206154942] [2021-06-06 00:38:14,196 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 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 [2021-06-06 00:38:14,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:38:14,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:38:14,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:14,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206154942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:14,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:14,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-06 00:38:14,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182330146] [2021-06-06 00:38:14,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:38:14,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:14,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:38:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:38:14,255 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:14,300 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2021-06-06 00:38:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:38:14,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-06 00:38:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:14,300 INFO L225 Difference]: With dead ends: 54 [2021-06-06 00:38:14,300 INFO L226 Difference]: Without dead ends: 40 [2021-06-06 00:38:14,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:38:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-06 00:38:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-06-06 00:38:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 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) [2021-06-06 00:38:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-06-06 00:38:14,301 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 25 [2021-06-06 00:38:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:14,301 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-06-06 00:38:14,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-06-06 00:38:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:38:14,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:14,302 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:14,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-06 00:38:14,502 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:14,502 INFO L82 PathProgramCache]: Analyzing trace with hash 979739577, now seen corresponding path program 41 times [2021-06-06 00:38:14,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:14,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304047782] [2021-06-06 00:38:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:14,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:14,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304047782] [2021-06-06 00:38:14,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304047782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684859322] [2021-06-06 00:38:14,567 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 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 [2021-06-06 00:38:14,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:38:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:38:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:14,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684859322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:14,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:38:14,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2021-06-06 00:38:14,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115255516] [2021-06-06 00:38:14,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:38:14,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:14,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:38:14,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:38:14,672 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:14,815 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2021-06-06 00:38:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:38:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-06-06 00:38:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:14,816 INFO L225 Difference]: With dead ends: 75 [2021-06-06 00:38:14,816 INFO L226 Difference]: Without dead ends: 68 [2021-06-06 00:38:14,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:38:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-06 00:38:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-06-06 00:38:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 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) [2021-06-06 00:38:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-06-06 00:38:14,817 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 27 [2021-06-06 00:38:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:14,817 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-06-06 00:38:14,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-06-06 00:38:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:38:14,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:38:14,818 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:38:15,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:15,018 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:38:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:38:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash -291209033, now seen corresponding path program 42 times [2021-06-06 00:38:15,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:38:15,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404370949] [2021-06-06 00:38:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:38:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:38:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:38:15,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:38:15,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404370949] [2021-06-06 00:38:15,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404370949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:38:15,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194149692] [2021-06-06 00:38:15,070 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 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 [2021-06-06 00:38:15,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:38:15,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:38:15,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:38:15,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:38:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-06 00:38:15,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194149692] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:38:15,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-06 00:38:15,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2021-06-06 00:38:15,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838819074] [2021-06-06 00:38:15,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:38:15,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:38:15,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:38:15,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:38:15,174 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:38:15,187 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-06-06 00:38:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:38:15,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-06 00:38:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:38:15,188 INFO L225 Difference]: With dead ends: 41 [2021-06-06 00:38:15,188 INFO L226 Difference]: Without dead ends: 0 [2021-06-06 00:38:15,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:38:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-06 00:38:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-06 00:38:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-06 00:38:15,188 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-06-06 00:38:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:38:15,188 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-06 00:38:15,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:38:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-06 00:38:15,188 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-06 00:38:15,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:38:15,390 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:38:15,392 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:38:15 BasicIcfg [2021-06-06 00:38:15,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:38:15,392 INFO L168 Benchmark]: Toolchain (without parser) took 18271.93 ms. Allocated memory is still 350.2 MB. Free memory was 330.5 MB in the beginning and 288.6 MB in the end (delta: 41.9 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.0 GB. [2021-06-06 00:38:15,392 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 350.2 MB. Free memory was 331.5 MB in the beginning and 331.5 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:38:15,392 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.60 ms. Allocated memory is still 350.2 MB. Free memory was 330.4 MB in the beginning and 329.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:38:15,393 INFO L168 Benchmark]: Boogie Preprocessor took 10.33 ms. Allocated memory is still 350.2 MB. Free memory was 329.0 MB in the beginning and 328.0 MB in the end (delta: 918.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:38:15,393 INFO L168 Benchmark]: RCFGBuilder took 142.00 ms. Allocated memory is still 350.2 MB. Free memory was 328.0 MB in the beginning and 318.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-06 00:38:15,393 INFO L168 Benchmark]: TraceAbstraction took 18098.29 ms. Allocated memory is still 350.2 MB. Free memory was 317.9 MB in the beginning and 288.6 MB in the end (delta: 29.4 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.0 GB. [2021-06-06 00:38:15,393 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 350.2 MB. Free memory was 331.5 MB in the beginning and 331.5 MB in the end (delta: 76.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.60 ms. Allocated memory is still 350.2 MB. Free memory was 330.4 MB in the beginning and 329.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.33 ms. Allocated memory is still 350.2 MB. Free memory was 329.0 MB in the beginning and 328.0 MB in the end (delta: 918.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 142.00 ms. Allocated memory is still 350.2 MB. Free memory was 328.0 MB in the beginning and 318.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 18098.29 ms. Allocated memory is still 350.2 MB. Free memory was 317.9 MB in the beginning and 288.6 MB in the end (delta: 29.4 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18046.5ms, OverallIterations: 47, TraceHistogramMax: 5, EmptinessCheckTime: 28.5ms, AutomataDifference: 3916.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 828 SDtfs, 2654 SDslu, 2656 SDs, 0 SdLazy, 3938 SolverSat, 653 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1742.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1381 GetRequests, 880 SyntacticMatches, 29 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 2624.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=339occurred in iteration=37, InterpolantAutomatonStates: 496, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 192.0ms AutomataMinimizationTime, 47 MinimizatonAttempts, 2877 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 81.2ms SsaConstructionTime, 340.3ms SatisfiabilityAnalysisTime, 3472.8ms InterpolantComputationTime, 1840 NumberOfCodeBlocks, 1814 NumberOfCodeBlocksAsserted, 173 NumberOfCheckSat, 1750 ConstructedInterpolants, 0 QuantifiedInterpolants, 7124 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1583 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 90 InterpolantComputations, 9 PerfectInterpolantSequences, 584/1205 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...