/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:23:02,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:23:02,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:23:02,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 15:23:02,234 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 [2021-05-03 15:23:02,260 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:23:02,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:23:02,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:23:02,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:23:02,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:23:02,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:23:02,263 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:23:02,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:23:02,263 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:23:02,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:23:02,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:23:02,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:23:02,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:23:02,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:23:02,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:23:02,264 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:23:02,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:23:02,265 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:23:02,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:23:02,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:23:02,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:23:02,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:23:02,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:23:02,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:23:02,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:23:02,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:23:02,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:23:02,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:23:02,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:23:02,266 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:23:02,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:23:02,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:23:02,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:23:02,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:23:02,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:23:02,541 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:23:02,542 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:23:02,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2021-05-03 15:23:02,543 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-05-03 15:23:03,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:23:03,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:23:03,015 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:23:03,015 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:23:03,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:23:03,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:23:03,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:23:03,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:23:03,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:23:03,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/1) ... [2021-05-03 15:23:03,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:23:03,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:23:03,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:23:03,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:23:03,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (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 [2021-05-03 15:23:03,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:23:03,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:23:03,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:23:03,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:23:03,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:23:03,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:23:03,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:23:03,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:23:03,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:23:03,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 15:23:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 15:23:03,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 15:23:03,113 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 15:23:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 15:23:03,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 15:23:03,114 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:23:03,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:23:03,262 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 15:23:03,263 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:23:03 BoogieIcfgContainer [2021-05-03 15:23:03,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:23:03,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:23:03,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:23:03,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:23:03,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:23:03" (1/2) ... [2021-05-03 15:23:03,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd49036 and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:23:03, skipping insertion in model container [2021-05-03 15:23:03,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:23:03" (2/2) ... [2021-05-03 15:23:03,268 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-05-03 15:23:03,271 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:23:03,272 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:23:03,289 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:23:03,289 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:23:03,370 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 15:23:03,383 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 15:23:03,396 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:23:03,397 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:23:03,397 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:23:03,397 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:23:03,397 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:23:03,397 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:23:03,397 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:23:03,397 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:23:03,404 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-05-03 15:23:03,452 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:03,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 15:23:03,474 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:03,475 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:03,476 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:03,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:03,482 INFO L82 PathProgramCache]: Analyzing trace with hash 938246004, now seen corresponding path program 1 times [2021-05-03 15:23:03,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:03,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801087436] [2021-05-03 15:23:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:03,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801087436] [2021-05-03 15:23:03,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:03,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:23:03,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447739080] [2021-05-03 15:23:03,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:23:03,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:03,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:23:03,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:23:03,688 INFO L87 Difference]: Start difference. First operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-05-03 15:23:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:03,766 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-05-03 15:23:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 15:23:03,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 26 [2021-05-03 15:23:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:03,792 INFO L225 Difference]: With dead ends: 1268 [2021-05-03 15:23:03,792 INFO L226 Difference]: Without dead ends: 1057 [2021-05-03 15:23:03,793 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:23:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-05-03 15:23:03,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-05-03 15:23:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-05-03 15:23:03,890 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-05-03 15:23:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:03,891 INFO L480 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-05-03 15:23:03,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-05-03 15:23:03,891 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-05-03 15:23:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 15:23:03,897 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:03,897 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:03,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:23:03,898 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:03,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:03,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1581838450, now seen corresponding path program 1 times [2021-05-03 15:23:03,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:03,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613160917] [2021-05-03 15:23:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:03,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613160917] [2021-05-03 15:23:03,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316368685] [2021-05-03 15:23:04,000 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 [2021-05-03 15:23:04,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:04,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 15:23:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:04,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:04,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-03 15:23:04,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81330899] [2021-05-03 15:23:04,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:23:04,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:23:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:23:04,242 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:04,419 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-05-03 15:23:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:23:04,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 15:23:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:04,426 INFO L225 Difference]: With dead ends: 1233 [2021-05-03 15:23:04,426 INFO L226 Difference]: Without dead ends: 1233 [2021-05-03 15:23:04,427 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:23:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-05-03 15:23:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-05-03 15:23:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-05-03 15:23:04,464 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-05-03 15:23:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:04,464 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-05-03 15:23:04,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-05-03 15:23:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 15:23:04,468 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:04,468 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:04,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 15:23:04,685 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:04,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2014079724, now seen corresponding path program 1 times [2021-05-03 15:23:04,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:04,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811909583] [2021-05-03 15:23:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:04,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811909583] [2021-05-03 15:23:04,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:04,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:23:04,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188097491] [2021-05-03 15:23:04,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:23:04,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:23:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:23:04,743 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:04,803 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-05-03 15:23:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:23:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 15:23:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:04,810 INFO L225 Difference]: With dead ends: 1101 [2021-05-03 15:23:04,810 INFO L226 Difference]: Without dead ends: 1047 [2021-05-03 15:23:04,815 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:23:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-05-03 15:23:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-05-03 15:23:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-05-03 15:23:04,841 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-05-03 15:23:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:04,842 INFO L480 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-05-03 15:23:04,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-05-03 15:23:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 15:23:04,844 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:04,844 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:04,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 15:23:04,845 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1366009100, now seen corresponding path program 2 times [2021-05-03 15:23:04,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:04,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714944926] [2021-05-03 15:23:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:04,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714944926] [2021-05-03 15:23:04,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:04,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:23:04,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478442543] [2021-05-03 15:23:04,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:23:04,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:23:04,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:23:04,901 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:04,945 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-05-03 15:23:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:23:04,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 15:23:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:04,950 INFO L225 Difference]: With dead ends: 834 [2021-05-03 15:23:04,950 INFO L226 Difference]: Without dead ends: 834 [2021-05-03 15:23:04,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:23:04,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-05-03 15:23:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-05-03 15:23:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-05-03 15:23:04,973 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-05-03 15:23:04,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:04,974 INFO L480 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-05-03 15:23:04,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-05-03 15:23:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 15:23:04,976 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:04,976 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:04,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 15:23:04,976 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash -718106448, now seen corresponding path program 2 times [2021-05-03 15:23:04,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:04,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331060136] [2021-05-03 15:23:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:05,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331060136] [2021-05-03 15:23:05,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:05,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:23:05,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389337117] [2021-05-03 15:23:05,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:23:05,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:05,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:23:05,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:23:05,006 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:05,073 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-05-03 15:23:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:23:05,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 15:23:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:05,083 INFO L225 Difference]: With dead ends: 878 [2021-05-03 15:23:05,083 INFO L226 Difference]: Without dead ends: 838 [2021-05-03 15:23:05,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:23:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-05-03 15:23:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-05-03 15:23:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-05-03 15:23:05,108 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-05-03 15:23:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:05,109 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-05-03 15:23:05,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-05-03 15:23:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:23:05,115 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:05,115 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:05,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 15:23:05,115 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:05,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1997029742, now seen corresponding path program 1 times [2021-05-03 15:23:05,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:05,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470899768] [2021-05-03 15:23:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:05,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470899768] [2021-05-03 15:23:05,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867070813] [2021-05-03 15:23:05,174 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 [2021-05-03 15:23:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:23:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:05,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:05,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-05-03 15:23:05,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748365531] [2021-05-03 15:23:05,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:23:05,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:05,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:23:05,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:23:05,337 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:05,408 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-05-03 15:23:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:23:05,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 15:23:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:05,425 INFO L225 Difference]: With dead ends: 3314 [2021-05-03 15:23:05,425 INFO L226 Difference]: Without dead ends: 3000 [2021-05-03 15:23:05,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:23:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-05-03 15:23:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-05-03 15:23:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-05-03 15:23:05,490 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-05-03 15:23:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:05,490 INFO L480 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-05-03 15:23:05,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-05-03 15:23:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:23:05,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:05,495 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:05,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:05,709 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash -390423246, now seen corresponding path program 2 times [2021-05-03 15:23:05,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:05,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963577142] [2021-05-03 15:23:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:05,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963577142] [2021-05-03 15:23:05,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:05,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 15:23:05,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518789834] [2021-05-03 15:23:05,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:23:05,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:05,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:23:05,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:23:05,745 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:05,810 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-05-03 15:23:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:23:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-03 15:23:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:05,828 INFO L225 Difference]: With dead ends: 3426 [2021-05-03 15:23:05,829 INFO L226 Difference]: Without dead ends: 3395 [2021-05-03 15:23:05,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:23:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-05-03 15:23:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-05-03 15:23:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-05-03 15:23:05,915 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-05-03 15:23:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:05,915 INFO L480 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-05-03 15:23:05,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-05-03 15:23:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:05,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:05,923 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:05,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 15:23:05,923 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1503101072, now seen corresponding path program 3 times [2021-05-03 15:23:05,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:05,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730127017] [2021-05-03 15:23:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:05,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730127017] [2021-05-03 15:23:05,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651114100] [2021-05-03 15:23:05,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:06,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:23:06,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:23:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:06,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:06,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-03 15:23:06,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442381703] [2021-05-03 15:23:06,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:23:06,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:06,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:23:06,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:23:06,154 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:06,488 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-05-03 15:23:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:23:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:06,545 INFO L225 Difference]: With dead ends: 10235 [2021-05-03 15:23:06,545 INFO L226 Difference]: Without dead ends: 10235 [2021-05-03 15:23:06,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:23:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-05-03 15:23:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-05-03 15:23:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-05-03 15:23:06,749 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-05-03 15:23:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:06,750 INFO L480 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-05-03 15:23:06,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-05-03 15:23:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:06,762 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:06,762 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:06,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:06,977 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:06,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1838023666, now seen corresponding path program 1 times [2021-05-03 15:23:06,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:06,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456790745] [2021-05-03 15:23:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:07,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456790745] [2021-05-03 15:23:07,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82984339] [2021-05-03 15:23:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 15:23:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:07,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:07,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 15:23:07,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300340708] [2021-05-03 15:23:07,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:23:07,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:23:07,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:23:07,166 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:07,347 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-05-03 15:23:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:23:07,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:07,387 INFO L225 Difference]: With dead ends: 8631 [2021-05-03 15:23:07,388 INFO L226 Difference]: Without dead ends: 8631 [2021-05-03 15:23:07,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:23:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-05-03 15:23:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-05-03 15:23:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-05-03 15:23:07,570 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-05-03 15:23:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:07,570 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-05-03 15:23:07,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-05-03 15:23:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:07,582 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:07,583 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:07,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:07,797 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:07,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:07,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1673971284, now seen corresponding path program 4 times [2021-05-03 15:23:07,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:07,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233090543] [2021-05-03 15:23:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:07,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233090543] [2021-05-03 15:23:07,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584057469] [2021-05-03 15:23:07,842 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 [2021-05-03 15:23:07,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:23:07,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:07,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:23:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:07,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:07,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 15:23:07,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606897360] [2021-05-03 15:23:07,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:23:07,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:07,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:23:07,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:23:07,976 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2021-05-03 15:23:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:08,354 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-05-03 15:23:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:23:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:08,429 INFO L225 Difference]: With dead ends: 15361 [2021-05-03 15:23:08,429 INFO L226 Difference]: Without dead ends: 15091 [2021-05-03 15:23:08,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:23:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-05-03 15:23:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-05-03 15:23:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-05-03 15:23:08,785 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-05-03 15:23:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:08,785 INFO L480 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-05-03 15:23:08,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2021-05-03 15:23:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-05-03 15:23:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:08,810 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:08,810 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:09,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 15:23:09,011 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:09,011 INFO L82 PathProgramCache]: Analyzing trace with hash -223038192, now seen corresponding path program 1 times [2021-05-03 15:23:09,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:09,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735221686] [2021-05-03 15:23:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:09,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735221686] [2021-05-03 15:23:09,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:09,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 15:23:09,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403267951] [2021-05-03 15:23:09,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:23:09,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:23:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:23:09,055 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:09,204 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-05-03 15:23:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:23:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:09,235 INFO L225 Difference]: With dead ends: 11634 [2021-05-03 15:23:09,235 INFO L226 Difference]: Without dead ends: 11496 [2021-05-03 15:23:09,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:23:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-05-03 15:23:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-05-03 15:23:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-05-03 15:23:09,529 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-05-03 15:23:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:09,530 INFO L480 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-05-03 15:23:09,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-05-03 15:23:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:09,551 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:09,551 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:09,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 15:23:09,551 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:09,551 INFO L82 PathProgramCache]: Analyzing trace with hash -981023376, now seen corresponding path program 2 times [2021-05-03 15:23:09,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:09,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011884378] [2021-05-03 15:23:09,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:09,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011884378] [2021-05-03 15:23:09,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:09,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 15:23:09,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434190694] [2021-05-03 15:23:09,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:23:09,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:09,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:23:09,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:23:09,585 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:09,730 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-05-03 15:23:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:23:09,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:09,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:09,756 INFO L225 Difference]: With dead ends: 10977 [2021-05-03 15:23:09,756 INFO L226 Difference]: Without dead ends: 10950 [2021-05-03 15:23:09,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:23:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-05-03 15:23:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-05-03 15:23:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-05-03 15:23:10,103 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-05-03 15:23:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:10,103 INFO L480 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-05-03 15:23:10,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-05-03 15:23:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:10,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:10,123 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:10,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 15:23:10,124 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:10,124 INFO L82 PathProgramCache]: Analyzing trace with hash -626249420, now seen corresponding path program 2 times [2021-05-03 15:23:10,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:10,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874316388] [2021-05-03 15:23:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:10,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874316388] [2021-05-03 15:23:10,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:23:10,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 15:23:10,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846726932] [2021-05-03 15:23:10,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:23:10,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:10,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:23:10,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:23:10,148 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:10,306 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-05-03 15:23:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:23:10,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:10,339 INFO L225 Difference]: With dead ends: 11062 [2021-05-03 15:23:10,339 INFO L226 Difference]: Without dead ends: 11002 [2021-05-03 15:23:10,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:23:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-05-03 15:23:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-05-03 15:23:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-05-03 15:23:10,603 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-05-03 15:23:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:10,603 INFO L480 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-05-03 15:23:10,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-05-03 15:23:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:10,622 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:10,622 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:10,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 15:23:10,623 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1035058804, now seen corresponding path program 5 times [2021-05-03 15:23:10,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:10,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484547773] [2021-05-03 15:23:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:10,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484547773] [2021-05-03 15:23:10,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614701204] [2021-05-03 15:23:10,658 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 [2021-05-03 15:23:10,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:23:10,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:10,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:23:10,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:10,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:10,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 15:23:10,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534741483] [2021-05-03 15:23:10,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:23:10,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:23:10,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:23:10,845 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:11,185 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-05-03 15:23:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:23:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:11,228 INFO L225 Difference]: With dead ends: 17289 [2021-05-03 15:23:11,229 INFO L226 Difference]: Without dead ends: 17289 [2021-05-03 15:23:11,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:23:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-05-03 15:23:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-05-03 15:23:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-05-03 15:23:11,601 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-05-03 15:23:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:11,602 INFO L480 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-05-03 15:23:11,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-05-03 15:23:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:11,627 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:11,627 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:11,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:11,842 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1682961456, now seen corresponding path program 6 times [2021-05-03 15:23:11,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:11,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862080878] [2021-05-03 15:23:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:11,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862080878] [2021-05-03 15:23:11,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41574362] [2021-05-03 15:23:11,882 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 [2021-05-03 15:23:11,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:23:11,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:11,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:23:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:12,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:12,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 15:23:12,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827907544] [2021-05-03 15:23:12,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:23:12,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:12,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:23:12,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:23:12,083 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:12,418 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-05-03 15:23:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:23:12,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:12,471 INFO L225 Difference]: With dead ends: 17283 [2021-05-03 15:23:12,471 INFO L226 Difference]: Without dead ends: 17145 [2021-05-03 15:23:12,471 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:23:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-05-03 15:23:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-05-03 15:23:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-05-03 15:23:12,800 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-05-03 15:23:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:12,800 INFO L480 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-05-03 15:23:12,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-05-03 15:23:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:12,819 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:12,819 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:13,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 15:23:13,035 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:13,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:13,035 INFO L82 PathProgramCache]: Analyzing trace with hash -915931212, now seen corresponding path program 7 times [2021-05-03 15:23:13,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:13,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292309675] [2021-05-03 15:23:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:23:13,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292309675] [2021-05-03 15:23:13,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134622610] [2021-05-03 15:23:13,090 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 [2021-05-03 15:23:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:23:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:13,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:13,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 15:23:13,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457264182] [2021-05-03 15:23:13,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:23:13,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:23:13,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:23:13,285 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:13,754 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-05-03 15:23:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:23:13,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:13,832 INFO L225 Difference]: With dead ends: 26096 [2021-05-03 15:23:13,833 INFO L226 Difference]: Without dead ends: 26096 [2021-05-03 15:23:13,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:23:13,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-05-03 15:23:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-05-03 15:23:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-05-03 15:23:14,411 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-05-03 15:23:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:14,411 INFO L480 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-05-03 15:23:14,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-05-03 15:23:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:14,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:14,444 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:14,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 15:23:14,645 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1035025234, now seen corresponding path program 8 times [2021-05-03 15:23:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:14,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664847565] [2021-05-03 15:23:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:23:14,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664847565] [2021-05-03 15:23:14,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860677411] [2021-05-03 15:23:14,695 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 [2021-05-03 15:23:14,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:23:14,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:14,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:23:14,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:14,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:14,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 15:23:14,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762538743] [2021-05-03 15:23:14,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:23:14,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:14,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:23:14,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:23:14,835 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:15,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:15,286 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-05-03 15:23:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:23:15,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:15,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:15,341 INFO L225 Difference]: With dead ends: 19071 [2021-05-03 15:23:15,341 INFO L226 Difference]: Without dead ends: 19009 [2021-05-03 15:23:15,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:23:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-05-03 15:23:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-05-03 15:23:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-05-03 15:23:15,751 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-05-03 15:23:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:15,751 INFO L480 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-05-03 15:23:15,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-05-03 15:23:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:15,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:15,779 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:15,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 15:23:15,989 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1628603050, now seen corresponding path program 9 times [2021-05-03 15:23:15,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:15,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760806053] [2021-05-03 15:23:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:23:16,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760806053] [2021-05-03 15:23:16,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135893344] [2021-05-03 15:23:16,021 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 [2021-05-03 15:23:16,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:23:16,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:16,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:23:16,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:16,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:16,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 15:23:16,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699813867] [2021-05-03 15:23:16,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:23:16,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:16,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:23:16,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:23:16,157 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:16,536 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-05-03 15:23:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:23:16,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:16,744 INFO L225 Difference]: With dead ends: 25596 [2021-05-03 15:23:16,744 INFO L226 Difference]: Without dead ends: 25518 [2021-05-03 15:23:16,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:23:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-05-03 15:23:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-05-03 15:23:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-05-03 15:23:17,247 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-05-03 15:23:17,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:17,248 INFO L480 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-05-03 15:23:17,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-05-03 15:23:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:23:17,279 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:17,279 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:17,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 15:23:17,480 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:17,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1459493096, now seen corresponding path program 10 times [2021-05-03 15:23:17,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:17,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769288095] [2021-05-03 15:23:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:17,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769288095] [2021-05-03 15:23:17,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145253840] [2021-05-03 15:23:17,514 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 [2021-05-03 15:23:17,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:23:17,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:17,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:23:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:17,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:17,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 15:23:17,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929621030] [2021-05-03 15:23:17,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:23:17,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:23:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:23:17,629 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:18,062 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-05-03 15:23:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:23:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:23:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:18,139 INFO L225 Difference]: With dead ends: 25214 [2021-05-03 15:23:18,139 INFO L226 Difference]: Without dead ends: 25094 [2021-05-03 15:23:18,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:23:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-05-03 15:23:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-05-03 15:23:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-05-03 15:23:18,695 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-05-03 15:23:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:18,695 INFO L480 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-05-03 15:23:18,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:18,695 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-05-03 15:23:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 15:23:18,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:18,724 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:18,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:18,929 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1954676526, now seen corresponding path program 11 times [2021-05-03 15:23:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:18,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566819360] [2021-05-03 15:23:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:18,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566819360] [2021-05-03 15:23:18,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242599732] [2021-05-03 15:23:18,986 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 [2021-05-03 15:23:19,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:23:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:23:19,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:19,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:19,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-05-03 15:23:19,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117721585] [2021-05-03 15:23:19,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:23:19,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:19,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:23:19,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:23:19,140 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:19,525 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-05-03 15:23:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:23:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 15:23:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:19,611 INFO L225 Difference]: With dead ends: 30028 [2021-05-03 15:23:19,611 INFO L226 Difference]: Without dead ends: 29440 [2021-05-03 15:23:19,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:23:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-05-03 15:23:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-05-03 15:23:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-05-03 15:23:20,211 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-05-03 15:23:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:20,211 INFO L480 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-05-03 15:23:20,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-05-03 15:23:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 15:23:20,252 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:20,252 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:20,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:20,457 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash -554854418, now seen corresponding path program 12 times [2021-05-03 15:23:20,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:20,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690856547] [2021-05-03 15:23:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:20,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690856547] [2021-05-03 15:23:20,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486456102] [2021-05-03 15:23:20,504 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 [2021-05-03 15:23:20,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:23:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:20,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:23:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:20,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:20,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-05-03 15:23:20,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688235540] [2021-05-03 15:23:20,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:23:20,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:20,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:23:20,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:23:20,640 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:21,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:21,263 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-05-03 15:23:21,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:23:21,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 15:23:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:21,478 INFO L225 Difference]: With dead ends: 60940 [2021-05-03 15:23:21,479 INFO L226 Difference]: Without dead ends: 58958 [2021-05-03 15:23:21,479 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:23:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-05-03 15:23:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-05-03 15:23:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-05-03 15:23:22,965 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-05-03 15:23:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:22,965 INFO L480 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-05-03 15:23:22,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:22,965 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-05-03 15:23:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 15:23:23,052 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:23,052 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:23,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 15:23:23,256 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -403396494, now seen corresponding path program 13 times [2021-05-03 15:23:23,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:23,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684758707] [2021-05-03 15:23:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:23:23,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684758707] [2021-05-03 15:23:23,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141875336] [2021-05-03 15:23:23,301 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 [2021-05-03 15:23:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:23,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:23:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:23,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:23,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-05-03 15:23:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955558206] [2021-05-03 15:23:23,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:23:23,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:23:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:23:23,415 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:24,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:24,040 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-05-03 15:23:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:23:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 15:23:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:24,259 INFO L225 Difference]: With dead ends: 60941 [2021-05-03 15:23:24,259 INFO L226 Difference]: Without dead ends: 60279 [2021-05-03 15:23:24,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:23:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-05-03 15:23:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-05-03 15:23:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-05-03 15:23:26,164 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-05-03 15:23:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:26,165 INFO L480 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-05-03 15:23:26,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-05-03 15:23:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:23:26,300 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:26,300 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:26,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:26,501 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1571777584, now seen corresponding path program 14 times [2021-05-03 15:23:26,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:26,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371387839] [2021-05-03 15:23:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:26,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371387839] [2021-05-03 15:23:26,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496696796] [2021-05-03 15:23:26,567 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 [2021-05-03 15:23:26,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:23:26,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:23:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:26,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:26,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-03 15:23:26,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415423341] [2021-05-03 15:23:26,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:23:26,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:23:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:23:26,711 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:28,173 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-05-03 15:23:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:23:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:23:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:28,898 INFO L225 Difference]: With dead ends: 115835 [2021-05-03 15:23:28,898 INFO L226 Difference]: Without dead ends: 115835 [2021-05-03 15:23:28,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:23:29,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-05-03 15:23:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-05-03 15:23:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-05-03 15:23:31,268 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-05-03 15:23:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:31,268 INFO L480 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-05-03 15:23:31,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-05-03 15:23:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:23:31,400 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:31,400 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:31,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 15:23:31,600 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:31,601 INFO L82 PathProgramCache]: Analyzing trace with hash -574261100, now seen corresponding path program 15 times [2021-05-03 15:23:31,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:31,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389536268] [2021-05-03 15:23:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:31,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389536268] [2021-05-03 15:23:31,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302765728] [2021-05-03 15:23:31,648 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 [2021-05-03 15:23:31,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:23:31,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:23:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:31,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:31,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 15:23:31,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501163860] [2021-05-03 15:23:31,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:23:31,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:23:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:23:31,796 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:33,383 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-05-03 15:23:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:23:33,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:23:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:34,258 INFO L225 Difference]: With dead ends: 148781 [2021-05-03 15:23:34,259 INFO L226 Difference]: Without dead ends: 147463 [2021-05-03 15:23:34,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:23:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-05-03 15:23:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-05-03 15:23:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-05-03 15:23:38,182 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-05-03 15:23:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:38,182 INFO L480 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-05-03 15:23:38,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-05-03 15:23:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:23:38,408 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:38,408 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:38,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:23:38,609 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:38,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1053355276, now seen corresponding path program 16 times [2021-05-03 15:23:38,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:38,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781770991] [2021-05-03 15:23:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:38,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781770991] [2021-05-03 15:23:38,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654615646] [2021-05-03 15:23:38,651 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 [2021-05-03 15:23:38,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:23:38,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:38,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:23:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:38,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:38,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-03 15:23:38,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128168768] [2021-05-03 15:23:38,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:23:38,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:38,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:23:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:23:38,790 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:40,664 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-05-03 15:23:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:23:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:23:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:41,315 INFO L225 Difference]: With dead ends: 170107 [2021-05-03 15:23:41,315 INFO L226 Difference]: Without dead ends: 170087 [2021-05-03 15:23:41,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:23:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-05-03 15:23:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-05-03 15:23:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:46,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-05-03 15:23:46,450 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-05-03 15:23:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:46,450 INFO L480 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-05-03 15:23:46,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-05-03 15:23:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:23:46,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:46,635 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:46,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 15:23:46,836 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:46,836 INFO L82 PathProgramCache]: Analyzing trace with hash -405452624, now seen corresponding path program 17 times [2021-05-03 15:23:46,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:46,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928547922] [2021-05-03 15:23:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:46,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928547922] [2021-05-03 15:23:46,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035645248] [2021-05-03 15:23:46,881 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 [2021-05-03 15:23:46,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 15:23:46,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:46,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:23:46,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:47,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:47,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-03 15:23:47,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361980346] [2021-05-03 15:23:47,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:23:47,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:47,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:23:47,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:23:47,030 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:48,694 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-05-03 15:23:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:23:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:23:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:49,685 INFO L225 Difference]: With dead ends: 140554 [2021-05-03 15:23:49,686 INFO L226 Difference]: Without dead ends: 140250 [2021-05-03 15:23:49,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:23:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-05-03 15:23:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-05-03 15:23:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-05-03 15:23:53,207 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-05-03 15:23:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:23:53,207 INFO L480 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-05-03 15:23:53,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-05-03 15:23:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:23:53,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:23:53,401 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:23:53,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 15:23:53,602 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:23:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:23:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458894, now seen corresponding path program 18 times [2021-05-03 15:23:53,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:23:53,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91523448] [2021-05-03 15:23:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:23:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:23:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:23:53,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91523448] [2021-05-03 15:23:53,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681391518] [2021-05-03 15:23:53,649 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 [2021-05-03 15:23:54,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:23:54,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:23:54,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:23:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:23:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:23:54,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:23:54,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-03 15:23:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473632819] [2021-05-03 15:23:54,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:23:54,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:23:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:23:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:23:54,346 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:23:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:23:56,168 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-05-03 15:23:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:23:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:23:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:23:56,813 INFO L225 Difference]: With dead ends: 157433 [2021-05-03 15:23:56,813 INFO L226 Difference]: Without dead ends: 156538 [2021-05-03 15:23:56,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:23:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-05-03 15:24:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-05-03 15:24:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-05-03 15:24:01,248 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-05-03 15:24:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:24:01,248 INFO L480 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-05-03 15:24:01,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-05-03 15:24:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:24:01,461 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:24:01,461 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:24:01,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 15:24:01,662 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:24:01,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:24:01,662 INFO L82 PathProgramCache]: Analyzing trace with hash -564059436, now seen corresponding path program 19 times [2021-05-03 15:24:01,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:24:01,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563350148] [2021-05-03 15:24:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:24:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:24:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:24:01,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563350148] [2021-05-03 15:24:01,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007019679] [2021-05-03 15:24:01,701 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) [2021-05-03 15:24:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:24:01,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:24:01,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:24:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:24:01,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:24:01,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 15:24:01,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511822574] [2021-05-03 15:24:01,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:24:01,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:24:01,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:24:01,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:24:01,851 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:24:04,413 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-05-03 15:24:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:24:04,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:24:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:24:05,124 INFO L225 Difference]: With dead ends: 192417 [2021-05-03 15:24:05,125 INFO L226 Difference]: Without dead ends: 191725 [2021-05-03 15:24:05,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 395.0ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:24:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-05-03 15:24:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-05-03 15:24:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-05-03 15:24:10,949 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-05-03 15:24:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:24:10,949 INFO L480 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-05-03 15:24:10,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-05-03 15:24:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:24:11,205 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:24:11,205 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:24:11,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 15:24:11,405 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:24:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:24:11,406 INFO L82 PathProgramCache]: Analyzing trace with hash -689678634, now seen corresponding path program 20 times [2021-05-03 15:24:11,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:24:11,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105003848] [2021-05-03 15:24:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:24:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:24:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:24:11,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105003848] [2021-05-03 15:24:11,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213792390] [2021-05-03 15:24:11,462 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 [2021-05-03 15:24:11,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:24:11,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:24:11,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:24:11,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:24:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:24:11,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:24:11,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 15:24:11,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236805047] [2021-05-03 15:24:11,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:24:11,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:24:11,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:24:11,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:24:11,613 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:24:13,933 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-05-03 15:24:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:24:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:24:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:24:15,314 INFO L225 Difference]: With dead ends: 221192 [2021-05-03 15:24:15,315 INFO L226 Difference]: Without dead ends: 221192 [2021-05-03 15:24:15,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 406.0ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:24:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-05-03 15:24:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-05-03 15:24:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-05-03 15:24:20,476 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-05-03 15:24:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:24:20,476 INFO L480 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-05-03 15:24:20,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:20,476 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-05-03 15:24:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:24:20,673 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:24:20,673 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:24:20,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 15:24:20,873 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:24:20,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:24:20,874 INFO L82 PathProgramCache]: Analyzing trace with hash -26712938, now seen corresponding path program 21 times [2021-05-03 15:24:20,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:24:20,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806585985] [2021-05-03 15:24:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:24:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:24:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:24:20,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806585985] [2021-05-03 15:24:20,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815953573] [2021-05-03 15:24:20,914 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 [2021-05-03 15:24:20,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:24:20,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:24:20,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:24:20,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:24:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:24:21,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:24:21,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 15:24:21,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087039040] [2021-05-03 15:24:21,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:24:21,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:24:21,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:24:21,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:24:21,049 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:21,773 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-05-03 15:24:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:24:23,260 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-05-03 15:24:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:24:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:24:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:24:23,982 INFO L225 Difference]: With dead ends: 149434 [2021-05-03 15:24:23,982 INFO L226 Difference]: Without dead ends: 149030 [2021-05-03 15:24:23,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 786.9ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:24:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-05-03 15:24:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-05-03 15:24:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-05-03 15:24:28,336 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-05-03 15:24:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:24:28,336 INFO L480 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-05-03 15:24:28,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-05-03 15:24:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:24:28,536 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:24:28,536 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:24:28,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:24:28,739 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:24:28,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:24:28,740 INFO L82 PathProgramCache]: Analyzing trace with hash -498320652, now seen corresponding path program 22 times [2021-05-03 15:24:28,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:24:28,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689226479] [2021-05-03 15:24:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:24:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:24:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:24:28,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689226479] [2021-05-03 15:24:28,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62679480] [2021-05-03 15:24:28,782 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 [2021-05-03 15:24:28,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:24:28,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:24:28,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:24:28,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:24:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:24:28,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:24:28,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 15:24:28,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434762924] [2021-05-03 15:24:28,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:24:28,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:24:28,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:24:28,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:24:28,932 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:31,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:24:31,706 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-05-03 15:24:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:24:31,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:24:31,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:24:32,798 INFO L225 Difference]: With dead ends: 262218 [2021-05-03 15:24:32,798 INFO L226 Difference]: Without dead ends: 262218 [2021-05-03 15:24:32,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 409.0ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:24:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-05-03 15:24:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-05-03 15:24:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-05-03 15:24:41,581 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-05-03 15:24:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:24:41,582 INFO L480 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-05-03 15:24:41,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-05-03 15:24:41,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:24:41,920 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:24:41,920 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:24:42,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-03 15:24:42,125 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:24:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:24:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2046213610, now seen corresponding path program 23 times [2021-05-03 15:24:42,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:24:42,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883813686] [2021-05-03 15:24:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:24:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:24:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:24:42,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883813686] [2021-05-03 15:24:42,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363933860] [2021-05-03 15:24:42,165 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 [2021-05-03 15:24:42,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:24:42,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:24:42,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:24:42,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:24:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:24:42,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:24:42,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-03 15:24:42,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888270364] [2021-05-03 15:24:42,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:24:42,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:24:42,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:24:42,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:24:42,313 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:24:44,884 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-05-03 15:24:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:24:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:24:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:24:46,675 INFO L225 Difference]: With dead ends: 254683 [2021-05-03 15:24:46,675 INFO L226 Difference]: Without dead ends: 254373 [2021-05-03 15:24:46,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:24:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-05-03 15:24:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-05-03 15:24:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-05-03 15:24:54,794 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-05-03 15:24:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:24:54,794 INFO L480 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-05-03 15:24:54,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-05-03 15:24:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:24:55,138 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:24:55,138 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:24:55,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:24:55,338 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:24:55,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:24:55,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1041882536, now seen corresponding path program 24 times [2021-05-03 15:24:55,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:24:55,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088270884] [2021-05-03 15:24:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:24:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:24:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:24:55,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088270884] [2021-05-03 15:24:55,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33819482] [2021-05-03 15:24:55,379 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 [2021-05-03 15:24:55,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:24:55,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:24:55,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:24:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:24:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:24:55,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:24:55,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 15:24:55,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128116802] [2021-05-03 15:24:55,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:24:55,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:24:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:24:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:24:55,518 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:24:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:24:58,783 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-05-03 15:24:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:24:58,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:24:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:25:00,053 INFO L225 Difference]: With dead ends: 283294 [2021-05-03 15:25:00,053 INFO L226 Difference]: Without dead ends: 282784 [2021-05-03 15:25:00,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:25:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-05-03 15:25:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-05-03 15:25:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-05-03 15:25:10,080 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-05-03 15:25:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:25:10,080 INFO L480 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-05-03 15:25:10,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-05-03 15:25:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:25:10,438 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:25:10,438 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:25:10,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 15:25:10,639 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:25:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:25:10,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1862781996, now seen corresponding path program 25 times [2021-05-03 15:25:10,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:25:10,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652637237] [2021-05-03 15:25:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:25:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:25:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:25:10,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652637237] [2021-05-03 15:25:10,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763147470] [2021-05-03 15:25:10,697 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 [2021-05-03 15:25:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:25:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:25:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:25:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:25:10,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:25:10,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 15:25:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055842310] [2021-05-03 15:25:10,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:25:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:25:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:25:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:25:10,870 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:25:14,269 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-05-03 15:25:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:25:14,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:25:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:25:15,487 INFO L225 Difference]: With dead ends: 290122 [2021-05-03 15:25:15,487 INFO L226 Difference]: Without dead ends: 289652 [2021-05-03 15:25:15,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:25:16,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-05-03 15:25:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-05-03 15:25:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-05-03 15:25:25,671 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-05-03 15:25:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:25:25,671 INFO L480 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-05-03 15:25:25,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-05-03 15:25:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 15:25:26,277 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:25:26,277 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:25:26,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 15:25:26,492 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:25:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:25:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1975565294, now seen corresponding path program 26 times [2021-05-03 15:25:26,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:25:26,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121322674] [2021-05-03 15:25:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:25:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:25:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:25:26,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121322674] [2021-05-03 15:25:26,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295174239] [2021-05-03 15:25:26,572 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 [2021-05-03 15:25:26,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:25:26,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:25:26,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:25:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:25:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:25:26,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:25:26,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-05-03 15:25:26,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900275869] [2021-05-03 15:25:26,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:25:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:25:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:25:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:25:26,777 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:25:30,187 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-05-03 15:25:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:25:30,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 15:25:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:25:31,831 INFO L225 Difference]: With dead ends: 275767 [2021-05-03 15:25:31,832 INFO L226 Difference]: Without dead ends: 274998 [2021-05-03 15:25:31,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:25:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-05-03 15:25:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-05-03 15:25:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-05-03 15:25:42,298 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-05-03 15:25:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:25:42,299 INFO L480 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-05-03 15:25:42,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-05-03 15:25:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 15:25:42,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:25:42,749 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:25:42,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 15:25:42,949 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:25:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:25:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1727044438, now seen corresponding path program 27 times [2021-05-03 15:25:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:25:42,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121218733] [2021-05-03 15:25:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:25:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:25:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:25:43,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121218733] [2021-05-03 15:25:43,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405813687] [2021-05-03 15:25:43,009 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 [2021-05-03 15:25:43,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 15:25:43,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:25:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:25:43,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:25:43,769 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-05-03 15:25:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:25:43,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:25:43,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-05-03 15:25:43,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962689123] [2021-05-03 15:25:43,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:25:43,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:25:43,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:25:43,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:25:43,862 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:25:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:25:48,135 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-05-03 15:25:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:25:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 15:25:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:25:49,994 INFO L225 Difference]: With dead ends: 394201 [2021-05-03 15:25:49,994 INFO L226 Difference]: Without dead ends: 392734 [2021-05-03 15:25:49,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:25:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-05-03 15:26:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-05-03 15:26:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:26:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-05-03 15:26:05,473 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-05-03 15:26:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:26:05,473 INFO L480 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-05-03 15:26:05,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:26:05,473 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-05-03 15:26:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 15:26:06,145 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:26:06,145 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:26:06,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 15:26:06,346 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:26:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:26:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1495021836, now seen corresponding path program 1 times [2021-05-03 15:26:06,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:26:06,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850595648] [2021-05-03 15:26:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:26:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:26:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:26:06,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850595648] [2021-05-03 15:26:06,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294192918] [2021-05-03 15:26:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 15:26:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:26:06,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 15:26:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:26:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:26:06,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:26:06,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-05-03 15:26:06,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594509861] [2021-05-03 15:26:06,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:26:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:26:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:26:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:26:06,626 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 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) [2021-05-03 15:26:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:26:13,033 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-05-03 15:26:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:26:13,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 15:26:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:26:17,400 INFO L225 Difference]: With dead ends: 586179 [2021-05-03 15:26:17,400 INFO L226 Difference]: Without dead ends: 583951 [2021-05-03 15:26:17,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:26:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-05-03 15:26:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-05-03 15:26:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:26:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425975 states to 425975 states and 1972884 transitions. [2021-05-03 15:26:38,440 INFO L78 Accepts]: Start accepts. Automaton has 425975 states and 1972884 transitions. Word has length 38 [2021-05-03 15:26:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:26:38,441 INFO L480 AbstractCegarLoop]: Abstraction has 425975 states and 1972884 transitions. [2021-05-03 15:26:38,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 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) [2021-05-03 15:26:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 425975 states and 1972884 transitions. [2021-05-03 15:26:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 15:26:39,322 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:26:39,322 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:26:39,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 15:26:39,533 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:26:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:26:39,534 INFO L82 PathProgramCache]: Analyzing trace with hash 616191154, now seen corresponding path program 28 times [2021-05-03 15:26:39,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:26:39,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092830120] [2021-05-03 15:26:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:26:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:26:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:26:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092830120] [2021-05-03 15:26:39,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250483820] [2021-05-03 15:26:39,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:26:39,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:26:39,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:26:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:26:39,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:26:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:26:39,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:26:39,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-05-03 15:26:39,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941766091] [2021-05-03 15:26:39,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:26:39,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:26:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:26:39,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:26:39,707 INFO L87 Difference]: Start difference. First operand 425975 states and 1972884 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:26:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:26:45,150 INFO L93 Difference]: Finished difference Result 560533 states and 2590081 transitions. [2021-05-03 15:26:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:26:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 15:26:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:26:48,613 INFO L225 Difference]: With dead ends: 560533 [2021-05-03 15:26:48,613 INFO L226 Difference]: Without dead ends: 559708 [2021-05-03 15:26:48,613 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:26:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559708 states. [2021-05-03 15:27:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559708 to 545995. [2021-05-03 15:27:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545995 states, 545994 states have (on average 4.646322120755905) internal successors, (2536864), 545994 states have internal predecessors, (2536864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:27:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545995 states to 545995 states and 2536864 transitions. [2021-05-03 15:27:15,146 INFO L78 Accepts]: Start accepts. Automaton has 545995 states and 2536864 transitions. Word has length 38 [2021-05-03 15:27:15,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:27:15,146 INFO L480 AbstractCegarLoop]: Abstraction has 545995 states and 2536864 transitions. [2021-05-03 15:27:15,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:27:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 545995 states and 2536864 transitions. [2021-05-03 15:27:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 15:27:17,590 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:27:17,590 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:27:17,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:27:17,805 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:27:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:27:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash -9164784, now seen corresponding path program 29 times [2021-05-03 15:27:17,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:27:17,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436776470] [2021-05-03 15:27:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:27:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:27:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:27:17,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436776470] [2021-05-03 15:27:17,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192868424] [2021-05-03 15:27:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:27:17,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:27:17,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:27:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 15:27:17,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:27:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:27:18,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:27:18,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 15:27:18,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589628648] [2021-05-03 15:27:18,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:27:18,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:27:18,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:27:18,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:27:18,141 INFO L87 Difference]: Start difference. First operand 545995 states and 2536864 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:27:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:27:29,246 INFO L93 Difference]: Finished difference Result 810316 states and 3662784 transitions. [2021-05-03 15:27:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:27:29,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-03 15:27:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:27:37,388 INFO L225 Difference]: With dead ends: 810316 [2021-05-03 15:27:37,388 INFO L226 Difference]: Without dead ends: 810316 [2021-05-03 15:27:37,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 634.1ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 15:27:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810316 states. [2021-05-03 15:28:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810316 to 534782. [2021-05-03 15:28:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534782 states, 534781 states have (on average 4.638676392766385) internal successors, (2480676), 534781 states have internal predecessors, (2480676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:28:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534782 states to 534782 states and 2480676 transitions. [2021-05-03 15:28:05,256 INFO L78 Accepts]: Start accepts. Automaton has 534782 states and 2480676 transitions. Word has length 40 [2021-05-03 15:28:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:28:05,256 INFO L480 AbstractCegarLoop]: Abstraction has 534782 states and 2480676 transitions. [2021-05-03 15:28:05,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:28:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 534782 states and 2480676 transitions. [2021-05-03 15:28:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 15:28:07,110 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:28:07,110 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:28:07,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 15:28:07,310 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:28:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:28:07,311 INFO L82 PathProgramCache]: Analyzing trace with hash 826469332, now seen corresponding path program 30 times [2021-05-03 15:28:07,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:28:07,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23086804] [2021-05-03 15:28:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:28:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:28:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:28:07,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23086804] [2021-05-03 15:28:07,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619643665] [2021-05-03 15:28:07,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:28:07,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:28:07,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:28:07,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 15:28:07,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:28:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:28:07,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:28:07,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:28:07,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076340667] [2021-05-03 15:28:07,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:28:07,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:28:07,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:28:07,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:28:07,555 INFO L87 Difference]: Start difference. First operand 534782 states and 2480676 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:28:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:28:22,554 INFO L93 Difference]: Finished difference Result 1136355 states and 5157666 transitions. [2021-05-03 15:28:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 15:28:22,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-03 15:28:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:28:30,146 INFO L225 Difference]: With dead ends: 1136355 [2021-05-03 15:28:30,146 INFO L226 Difference]: Without dead ends: 1133906 [2021-05-03 15:28:30,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1043.4ms TimeCoverageRelationStatistics Valid=1280, Invalid=3976, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 15:28:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133906 states. [2021-05-03 15:29:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133906 to 706666. [2021-05-03 15:29:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706666 states, 706665 states have (on average 4.660015707584216) internal successors, (3293070), 706665 states have internal predecessors, (3293070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706666 states to 706666 states and 3293070 transitions. [2021-05-03 15:29:22,017 INFO L78 Accepts]: Start accepts. Automaton has 706666 states and 3293070 transitions. Word has length 40 [2021-05-03 15:29:22,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:29:22,017 INFO L480 AbstractCegarLoop]: Abstraction has 706666 states and 3293070 transitions. [2021-05-03 15:29:22,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:29:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 706666 states and 3293070 transitions. [2021-05-03 15:29:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 15:29:25,409 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:29:25,409 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:29:25,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 15:29:25,625 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:29:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:29:25,625 INFO L82 PathProgramCache]: Analyzing trace with hash -686057356, now seen corresponding path program 31 times [2021-05-03 15:29:25,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:29:25,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038524594] [2021-05-03 15:29:25,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:29:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:25,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038524594] [2021-05-03 15:29:25,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805704533] [2021-05-03 15:29:25,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:29:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:29:25,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 15:29:25,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:29:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:29:25,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:29:25,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-05-03 15:29:25,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658768280] [2021-05-03 15:29:25,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:29:25,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:29:25,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:29:25,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:29:25,993 INFO L87 Difference]: Start difference. First operand 706666 states and 3293070 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)