/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 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:42:38,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:42:38,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:42:38,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:42:38,878 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 [2021-04-15 03:42:38,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:42:38,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:42:38,912 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:42:38,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:42:38,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:42:38,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:42:38,913 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:42:38,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:42:38,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:42:38,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:42:38,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:42:38,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:42:38,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:42:38,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:42:38,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:42:38,915 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:42:38,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:42:38,915 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:42:38,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:42:38,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:42:38,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:42:38,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:42:38,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:42:38,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:42:38,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:42:38,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:42:38,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:42:38,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:42:38,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:42:38,917 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:42:38,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:42:38,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:42:39,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:42:39,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:42:39,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:42:39,277 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:42:39,279 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:42:39,280 INFO L432 ainManager$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 [2021-04-15 03:42:39,280 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-04-15 03:42:39,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:42:39,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:42:39,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:42:39,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:42:39,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:42:39,578 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 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,585 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 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:42:39,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:42:39,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:42:39,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:42:39,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (1/1) ... [2021-04-15 03:42:39,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:42:39,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:42:39,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:42:39,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:42:39,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (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 [2021-04-15 03:42:39,677 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:42:39,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:42:39,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:42:39,677 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:42:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:42:39,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:42:39,678 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:42:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:42:39,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:42:39,678 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 03:42:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 03:42:39,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 03:42:39,679 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-04-15 03:42:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-04-15 03:42:39,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-04-15 03:42:39,680 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 03:42:39,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:42:39,879 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 03:42:39,880 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:42:39 BoogieIcfgContainer [2021-04-15 03:42:39,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:42:39,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:42:39,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:42:39,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:42:39,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:42:39" (1/2) ... [2021-04-15 03:42:39,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77daee8b and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:42:39, skipping insertion in model container [2021-04-15 03:42:39,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:42:39" (2/2) ... [2021-04-15 03:42:39,887 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-04-15 03:42:39,892 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:42:39,893 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:42:39,896 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:42:39,897 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:42:39,939 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 03:42:39,954 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-04-15 03:42:39,971 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:42:39,971 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:42:39,971 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:42:39,972 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:42:39,972 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:42:39,972 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:42:39,972 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:42:39,972 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:42:39,980 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-04-15 03:42:40,055 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) [2021-04-15 03:42:40,062 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) [2021-04-15 03:42:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:42:40,084 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:40,084 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] [2021-04-15 03:42:40,085 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash 938246004, now seen corresponding path program 1 times [2021-04-15 03:42:40,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:40,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593186730] [2021-04-15 03:42:40,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:40,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593186730] [2021-04-15 03:42:40,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:42:40,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 03:42:40,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164730767] [2021-04-15 03:42:40,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:42:40,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:42:40,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:42:40,371 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) [2021-04-15 03:42:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:40,503 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-04-15 03:42:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:42:40,505 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 [2021-04-15 03:42:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:40,538 INFO L225 Difference]: With dead ends: 1268 [2021-04-15 03:42:40,538 INFO L226 Difference]: Without dead ends: 1057 [2021-04-15 03:42:40,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:42:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-04-15 03:42:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-04-15 03:42:40,674 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) [2021-04-15 03:42:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-04-15 03:42:40,683 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-04-15 03:42:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:40,685 INFO L480 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-04-15 03:42:40,685 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) [2021-04-15 03:42:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-04-15 03:42:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:42:40,698 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:40,699 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] [2021-04-15 03:42:40,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:42:40,700 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:40,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1581838450, now seen corresponding path program 1 times [2021-04-15 03:42:40,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:40,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907060412] [2021-04-15 03:42:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:40,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907060412] [2021-04-15 03:42:40,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495030460] [2021-04-15 03:42:40,836 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 [2021-04-15 03:42:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 03:42:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:41,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:41,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-04-15 03:42:41,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078788257] [2021-04-15 03:42:41,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:42:41,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:41,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:42:41,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:42:41,142 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) [2021-04-15 03:42:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:41,340 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-04-15 03:42:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:42:41,340 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 [2021-04-15 03:42:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:41,349 INFO L225 Difference]: With dead ends: 1233 [2021-04-15 03:42:41,350 INFO L226 Difference]: Without dead ends: 1233 [2021-04-15 03:42:41,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:42:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-04-15 03:42:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-04-15 03:42:41,383 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) [2021-04-15 03:42:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-04-15 03:42:41,389 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-04-15 03:42:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:41,389 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-04-15 03:42:41,389 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) [2021-04-15 03:42:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-04-15 03:42:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:42:41,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:41,393 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] [2021-04-15 03:42:41,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 03:42:41,617 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:41,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2014079724, now seen corresponding path program 1 times [2021-04-15 03:42:41,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:41,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319989442] [2021-04-15 03:42:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:41,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319989442] [2021-04-15 03:42:41,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:42:41,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:42:41,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271486382] [2021-04-15 03:42:41,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:42:41,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:41,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:42:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:42:41,683 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) [2021-04-15 03:42:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:41,773 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-04-15 03:42:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:42:41,774 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 [2021-04-15 03:42:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:41,784 INFO L225 Difference]: With dead ends: 1101 [2021-04-15 03:42:41,784 INFO L226 Difference]: Without dead ends: 1047 [2021-04-15 03:42:41,789 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:42:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-04-15 03:42:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-04-15 03:42:41,823 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) [2021-04-15 03:42:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-04-15 03:42:41,831 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-04-15 03:42:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:41,831 INFO L480 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-04-15 03:42:41,831 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) [2021-04-15 03:42:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-04-15 03:42:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:42:41,835 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:41,835 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] [2021-04-15 03:42:41,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 03:42:41,835 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1366009100, now seen corresponding path program 2 times [2021-04-15 03:42:41,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:41,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158815082] [2021-04-15 03:42:41,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:41,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158815082] [2021-04-15 03:42:41,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:42:41,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:42:41,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339571341] [2021-04-15 03:42:41,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:42:41,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:42:41,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:42:41,906 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) [2021-04-15 03:42:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:41,979 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-04-15 03:42:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:42:41,980 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 [2021-04-15 03:42:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:41,986 INFO L225 Difference]: With dead ends: 834 [2021-04-15 03:42:41,986 INFO L226 Difference]: Without dead ends: 834 [2021-04-15 03:42:41,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:42:41,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-04-15 03:42:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-04-15 03:42:42,009 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) [2021-04-15 03:42:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-04-15 03:42:42,014 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-04-15 03:42:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:42,014 INFO L480 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-04-15 03:42:42,015 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) [2021-04-15 03:42:42,015 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-04-15 03:42:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:42:42,017 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:42,017 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] [2021-04-15 03:42:42,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 03:42:42,018 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:42,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash -718106448, now seen corresponding path program 2 times [2021-04-15 03:42:42,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:42,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891712953] [2021-04-15 03:42:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:42,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891712953] [2021-04-15 03:42:42,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:42:42,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:42:42,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886387284] [2021-04-15 03:42:42,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:42:42,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:42,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:42:42,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:42:42,057 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) [2021-04-15 03:42:42,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:42,114 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-04-15 03:42:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:42:42,114 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 [2021-04-15 03:42:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:42,120 INFO L225 Difference]: With dead ends: 878 [2021-04-15 03:42:42,120 INFO L226 Difference]: Without dead ends: 838 [2021-04-15 03:42:42,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:42:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-04-15 03:42:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-04-15 03:42:42,142 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) [2021-04-15 03:42:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-04-15 03:42:42,147 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-04-15 03:42:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:42,147 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-04-15 03:42:42,147 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) [2021-04-15 03:42:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-04-15 03:42:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:42:42,150 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:42,150 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] [2021-04-15 03:42:42,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 03:42:42,150 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1997029742, now seen corresponding path program 1 times [2021-04-15 03:42:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:42,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157148261] [2021-04-15 03:42:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:42,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157148261] [2021-04-15 03:42:42,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439367817] [2021-04-15 03:42:42,201 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 [2021-04-15 03:42:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:42:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:42,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:42,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-04-15 03:42:42,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083716975] [2021-04-15 03:42:42,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:42:42,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:42,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:42:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:42:42,416 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) [2021-04-15 03:42:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:42,521 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-04-15 03:42:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:42:42,522 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 [2021-04-15 03:42:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:42,547 INFO L225 Difference]: With dead ends: 3314 [2021-04-15 03:42:42,547 INFO L226 Difference]: Without dead ends: 3000 [2021-04-15 03:42:42,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:42:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-04-15 03:42:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-04-15 03:42:42,646 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) [2021-04-15 03:42:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-04-15 03:42:42,661 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-04-15 03:42:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:42,661 INFO L480 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-04-15 03:42:42,662 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) [2021-04-15 03:42:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-04-15 03:42:42,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:42:42,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:42,669 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] [2021-04-15 03:42:42,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:42:42,870 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:42,870 INFO L82 PathProgramCache]: Analyzing trace with hash -390423246, now seen corresponding path program 2 times [2021-04-15 03:42:42,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:42,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652326531] [2021-04-15 03:42:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:42:42,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652326531] [2021-04-15 03:42:42,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:42:42,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:42:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381862824] [2021-04-15 03:42:42,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:42:42,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:42,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:42:42,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:42:42,950 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) [2021-04-15 03:42:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:43,052 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-04-15 03:42:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:42:43,052 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 [2021-04-15 03:42:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:43,079 INFO L225 Difference]: With dead ends: 3426 [2021-04-15 03:42:43,080 INFO L226 Difference]: Without dead ends: 3395 [2021-04-15 03:42:43,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:42:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-04-15 03:42:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-04-15 03:42:43,228 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) [2021-04-15 03:42:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-04-15 03:42:43,245 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-04-15 03:42:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:43,246 INFO L480 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-04-15 03:42:43,246 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) [2021-04-15 03:42:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-04-15 03:42:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:43,256 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:43,256 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] [2021-04-15 03:42:43,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 03:42:43,256 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1503101072, now seen corresponding path program 3 times [2021-04-15 03:42:43,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:43,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925176011] [2021-04-15 03:42:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925176011] [2021-04-15 03:42:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415151167] [2021-04-15 03:42:43,315 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 [2021-04-15 03:42:43,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:42:43,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:42:43,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:42:43,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:43,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:43,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-04-15 03:42:43,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546366411] [2021-04-15 03:42:43,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:42:43,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:43,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:42:43,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:42:43,462 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) [2021-04-15 03:42:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:43,825 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-04-15 03:42:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:42:43,825 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 [2021-04-15 03:42:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:43,885 INFO L225 Difference]: With dead ends: 10235 [2021-04-15 03:42:43,886 INFO L226 Difference]: Without dead ends: 10235 [2021-04-15 03:42:43,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:42:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-04-15 03:42:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-04-15 03:42:44,150 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) [2021-04-15 03:42:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-04-15 03:42:44,176 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-04-15 03:42:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:44,176 INFO L480 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-04-15 03:42:44,177 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) [2021-04-15 03:42:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-04-15 03:42:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:44,192 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:44,193 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] [2021-04-15 03:42:44,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:42:44,411 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:44,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1838023666, now seen corresponding path program 1 times [2021-04-15 03:42:44,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:44,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509157334] [2021-04-15 03:42:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:42:44,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509157334] [2021-04-15 03:42:44,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637774608] [2021-04-15 03:42:44,473 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 [2021-04-15 03:42:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:44,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 03:42:44,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:42:44,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:44,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 03:42:44,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89273244] [2021-04-15 03:42:44,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:42:44,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:44,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:42:44,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:42:44,624 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) [2021-04-15 03:42:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:44,790 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-04-15 03:42:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:42:44,790 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 [2021-04-15 03:42:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:44,832 INFO L225 Difference]: With dead ends: 8631 [2021-04-15 03:42:44,833 INFO L226 Difference]: Without dead ends: 8631 [2021-04-15 03:42:44,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:42:44,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-04-15 03:42:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-04-15 03:42:45,124 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) [2021-04-15 03:42:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-04-15 03:42:45,151 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-04-15 03:42:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:45,151 INFO L480 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-04-15 03:42:45,152 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) [2021-04-15 03:42:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-04-15 03:42:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:45,171 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:45,171 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] [2021-04-15 03:42:45,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:42:45,395 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:45,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1673971284, now seen corresponding path program 4 times [2021-04-15 03:42:45,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:45,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507357916] [2021-04-15 03:42:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:45,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507357916] [2021-04-15 03:42:45,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246861675] [2021-04-15 03:42:45,458 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) [2021-04-15 03:42:45,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:42:45,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:42:45,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:42:45,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:45,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:45,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 03:42:45,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79724692] [2021-04-15 03:42:45,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:42:45,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:45,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:42:45,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:42:45,640 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) [2021-04-15 03:42:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:46,190 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-04-15 03:42:46,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:42:46,191 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 [2021-04-15 03:42:46,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:46,269 INFO L225 Difference]: With dead ends: 15361 [2021-04-15 03:42:46,269 INFO L226 Difference]: Without dead ends: 15091 [2021-04-15 03:42:46,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:42:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-04-15 03:42:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-04-15 03:42:46,648 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) [2021-04-15 03:42:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-04-15 03:42:46,686 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-04-15 03:42:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:46,686 INFO L480 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-04-15 03:42:46,686 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) [2021-04-15 03:42:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-04-15 03:42:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:46,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:46,715 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] [2021-04-15 03:42:46,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 03:42:46,929 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:46,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash -223038192, now seen corresponding path program 1 times [2021-04-15 03:42:46,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:46,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030566445] [2021-04-15 03:42:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:42:47,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030566445] [2021-04-15 03:42:47,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:42:47,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:42:47,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940618439] [2021-04-15 03:42:47,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:42:47,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:47,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:42:47,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:42:47,065 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) [2021-04-15 03:42:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:47,235 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-04-15 03:42:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:42:47,235 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 [2021-04-15 03:42:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:47,279 INFO L225 Difference]: With dead ends: 11634 [2021-04-15 03:42:47,279 INFO L226 Difference]: Without dead ends: 11496 [2021-04-15 03:42:47,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:42:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-04-15 03:42:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-04-15 03:42:47,623 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) [2021-04-15 03:42:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-04-15 03:42:47,678 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-04-15 03:42:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:47,678 INFO L480 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-04-15 03:42:47,678 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) [2021-04-15 03:42:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-04-15 03:42:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:47,712 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:47,712 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] [2021-04-15 03:42:47,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-04-15 03:42:47,713 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash -981023376, now seen corresponding path program 2 times [2021-04-15 03:42:47,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:47,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404939959] [2021-04-15 03:42:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:42:47,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404939959] [2021-04-15 03:42:47,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:42:47,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:42:47,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770842223] [2021-04-15 03:42:47,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:42:47,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:47,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:42:47,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:42:47,767 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) [2021-04-15 03:42:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:47,970 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-04-15 03:42:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:42:47,978 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 [2021-04-15 03:42:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:48,014 INFO L225 Difference]: With dead ends: 10977 [2021-04-15 03:42:48,015 INFO L226 Difference]: Without dead ends: 10950 [2021-04-15 03:42:48,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:42:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-04-15 03:42:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-04-15 03:42:48,344 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) [2021-04-15 03:42:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-04-15 03:42:48,387 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-04-15 03:42:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:48,387 INFO L480 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-04-15 03:42:48,387 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) [2021-04-15 03:42:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-04-15 03:42:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:48,415 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:48,415 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] [2021-04-15 03:42:48,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-04-15 03:42:48,415 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -626249420, now seen corresponding path program 2 times [2021-04-15 03:42:48,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:48,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322621484] [2021-04-15 03:42:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:42:48,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322621484] [2021-04-15 03:42:48,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:42:48,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 03:42:48,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111323403] [2021-04-15 03:42:48,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:42:48,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:42:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:42:48,452 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) [2021-04-15 03:42:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:48,570 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-04-15 03:42:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:42:48,571 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 [2021-04-15 03:42:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:48,610 INFO L225 Difference]: With dead ends: 11062 [2021-04-15 03:42:48,610 INFO L226 Difference]: Without dead ends: 11002 [2021-04-15 03:42:48,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:42:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-04-15 03:42:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-04-15 03:42:48,967 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) [2021-04-15 03:42:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-04-15 03:42:49,011 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-04-15 03:42:49,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:49,012 INFO L480 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-04-15 03:42:49,012 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) [2021-04-15 03:42:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-04-15 03:42:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:49,040 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:49,040 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] [2021-04-15 03:42:49,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-04-15 03:42:49,040 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1035058804, now seen corresponding path program 5 times [2021-04-15 03:42:49,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:49,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025565894] [2021-04-15 03:42:49,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:49,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025565894] [2021-04-15 03:42:49,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891211068] [2021-04-15 03:42:49,098 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 [2021-04-15 03:42:49,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:42:49,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:42:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:42:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:49,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:49,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 03:42:49,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062655307] [2021-04-15 03:42:49,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:42:49,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:42:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:42:49,363 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) [2021-04-15 03:42:49,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:49,818 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-04-15 03:42:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:42:49,818 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 [2021-04-15 03:42:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:49,889 INFO L225 Difference]: With dead ends: 17289 [2021-04-15 03:42:49,889 INFO L226 Difference]: Without dead ends: 17289 [2021-04-15 03:42:49,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:42:49,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-04-15 03:42:50,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-04-15 03:42:50,332 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) [2021-04-15 03:42:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-04-15 03:42:50,370 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-04-15 03:42:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:50,370 INFO L480 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-04-15 03:42:50,370 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) [2021-04-15 03:42:50,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-04-15 03:42:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:50,402 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:50,402 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] [2021-04-15 03:42:50,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:42:50,605 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:50,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1682961456, now seen corresponding path program 6 times [2021-04-15 03:42:50,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:50,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262782207] [2021-04-15 03:42:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:50,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262782207] [2021-04-15 03:42:50,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930349905] [2021-04-15 03:42:50,674 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 [2021-04-15 03:42:50,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:42:50,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:42:50,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:42:50,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:50,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:50,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 03:42:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283259747] [2021-04-15 03:42:50,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:42:50,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:50,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:42:50,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:42:50,817 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) [2021-04-15 03:42:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:51,267 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-04-15 03:42:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:42:51,268 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 [2021-04-15 03:42:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:51,321 INFO L225 Difference]: With dead ends: 17283 [2021-04-15 03:42:51,321 INFO L226 Difference]: Without dead ends: 17145 [2021-04-15 03:42:51,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:42:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-04-15 03:42:51,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-04-15 03:42:51,618 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) [2021-04-15 03:42:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-04-15 03:42:51,661 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-04-15 03:42:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:51,661 INFO L480 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-04-15 03:42:51,661 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) [2021-04-15 03:42:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-04-15 03:42:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:51,686 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:51,686 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] [2021-04-15 03:42:51,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 03:42:51,887 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash -915931212, now seen corresponding path program 7 times [2021-04-15 03:42:51,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:51,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728010550] [2021-04-15 03:42:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:42:51,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728010550] [2021-04-15 03:42:51,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782681236] [2021-04-15 03:42:51,941 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 [2021-04-15 03:42:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:51,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:42:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:52,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:52,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 03:42:52,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878089902] [2021-04-15 03:42:52,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:42:52,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:42:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:42:52,121 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) [2021-04-15 03:42:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:52,583 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-04-15 03:42:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:42:52,583 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 [2021-04-15 03:42:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:52,676 INFO L225 Difference]: With dead ends: 26096 [2021-04-15 03:42:52,676 INFO L226 Difference]: Without dead ends: 26096 [2021-04-15 03:42:52,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:42:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-04-15 03:42:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-04-15 03:42:53,179 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) [2021-04-15 03:42:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-04-15 03:42:53,247 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-04-15 03:42:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:53,248 INFO L480 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-04-15 03:42:53,248 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) [2021-04-15 03:42:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-04-15 03:42:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:53,285 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:53,285 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] [2021-04-15 03:42:53,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 03:42:53,486 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:53,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1035025234, now seen corresponding path program 8 times [2021-04-15 03:42:53,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:53,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277284493] [2021-04-15 03:42:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:42:53,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277284493] [2021-04-15 03:42:53,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604965052] [2021-04-15 03:42:53,542 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 [2021-04-15 03:42:53,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:42:53,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:42:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:42:53,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:53,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:53,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 03:42:53,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653909638] [2021-04-15 03:42:53,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:42:53,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:53,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:42:53,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:42:53,703 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) [2021-04-15 03:42:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:54,057 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-04-15 03:42:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:42:54,057 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 [2021-04-15 03:42:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:54,125 INFO L225 Difference]: With dead ends: 19071 [2021-04-15 03:42:54,125 INFO L226 Difference]: Without dead ends: 19009 [2021-04-15 03:42:54,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:42:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-04-15 03:42:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-04-15 03:42:54,543 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) [2021-04-15 03:42:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-04-15 03:42:54,615 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-04-15 03:42:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:54,615 INFO L480 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-04-15 03:42:54,616 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) [2021-04-15 03:42:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-04-15 03:42:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:54,657 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:54,657 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] [2021-04-15 03:42:54,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 03:42:54,881 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:54,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1628603050, now seen corresponding path program 9 times [2021-04-15 03:42:54,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:54,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773959541] [2021-04-15 03:42:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:42:54,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773959541] [2021-04-15 03:42:54,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944065897] [2021-04-15 03:42:54,929 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 [2021-04-15 03:42:54,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:42:54,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:42:54,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:42:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:55,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:55,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 03:42:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921637371] [2021-04-15 03:42:55,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:42:55,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:42:55,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:42:55,108 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) [2021-04-15 03:42:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:55,480 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-04-15 03:42:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:42:55,480 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 [2021-04-15 03:42:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:55,568 INFO L225 Difference]: With dead ends: 25596 [2021-04-15 03:42:55,568 INFO L226 Difference]: Without dead ends: 25518 [2021-04-15 03:42:55,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:42:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-04-15 03:42:56,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-04-15 03:42:56,139 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) [2021-04-15 03:42:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-04-15 03:42:56,199 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-04-15 03:42:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:56,199 INFO L480 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-04-15 03:42:56,199 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) [2021-04-15 03:42:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-04-15 03:42:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:42:56,240 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:56,240 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] [2021-04-15 03:42:56,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 03:42:56,464 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:56,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1459493096, now seen corresponding path program 10 times [2021-04-15 03:42:56,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:56,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529425319] [2021-04-15 03:42:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:56,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529425319] [2021-04-15 03:42:56,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015196858] [2021-04-15 03:42:56,508 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 [2021-04-15 03:42:56,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:42:56,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:42:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:42:56,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:56,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:56,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 03:42:56,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520106218] [2021-04-15 03:42:56,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:42:56,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:56,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:42:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:42:56,642 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) [2021-04-15 03:42:57,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:57,240 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-04-15 03:42:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:42:57,240 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 [2021-04-15 03:42:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:57,333 INFO L225 Difference]: With dead ends: 25214 [2021-04-15 03:42:57,333 INFO L226 Difference]: Without dead ends: 25094 [2021-04-15 03:42:57,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:42:57,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-04-15 03:42:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-04-15 03:42:57,953 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) [2021-04-15 03:42:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-04-15 03:42:58,020 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-04-15 03:42:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:58,020 INFO L480 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-04-15 03:42:58,021 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) [2021-04-15 03:42:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-04-15 03:42:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:42:58,056 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:58,056 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] [2021-04-15 03:42:58,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:42:58,257 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:58,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1954676526, now seen corresponding path program 11 times [2021-04-15 03:42:58,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:58,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287784874] [2021-04-15 03:42:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:42:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:58,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287784874] [2021-04-15 03:42:58,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379093499] [2021-04-15 03:42:58,300 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 [2021-04-15 03:42:58,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:42:58,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:42:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:42:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:42:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:42:58,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:42:58,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-04-15 03:42:58,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709319223] [2021-04-15 03:42:58,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:42:58,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:42:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:42:58,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:42:58,476 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) [2021-04-15 03:42:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:42:58,943 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-04-15 03:42:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:42:58,943 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 [2021-04-15 03:42:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:42:59,058 INFO L225 Difference]: With dead ends: 30028 [2021-04-15 03:42:59,058 INFO L226 Difference]: Without dead ends: 29440 [2021-04-15 03:42:59,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:42:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-04-15 03:42:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-04-15 03:42:59,643 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) [2021-04-15 03:42:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-04-15 03:42:59,725 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-04-15 03:42:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:42:59,725 INFO L480 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-04-15 03:42:59,725 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) [2021-04-15 03:42:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-04-15 03:42:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:42:59,775 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:42:59,775 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] [2021-04-15 03:42:59,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:42:59,977 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:42:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:42:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash -554854418, now seen corresponding path program 12 times [2021-04-15 03:42:59,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:42:59,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946269467] [2021-04-15 03:42:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:42:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:43:00,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946269467] [2021-04-15 03:43:00,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998613027] [2021-04-15 03:43:00,036 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 [2021-04-15 03:43:00,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:43:00,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:43:00,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:43:00,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:43:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:00,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:43:00,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-04-15 03:43:00,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813981531] [2021-04-15 03:43:00,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:43:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:43:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:43:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:43:00,191 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) [2021-04-15 03:43:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:43:01,032 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-04-15 03:43:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:43:01,032 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 [2021-04-15 03:43:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:43:01,284 INFO L225 Difference]: With dead ends: 60940 [2021-04-15 03:43:01,285 INFO L226 Difference]: Without dead ends: 58958 [2021-04-15 03:43:01,285 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:43:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-04-15 03:43:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-04-15 03:43:02,786 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) [2021-04-15 03:43:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-04-15 03:43:02,945 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-04-15 03:43:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:43:02,946 INFO L480 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-04-15 03:43:02,946 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) [2021-04-15 03:43:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-04-15 03:43:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:43:03,040 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:43:03,040 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] [2021-04-15 03:43:03,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 03:43:03,243 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:43:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:43:03,243 INFO L82 PathProgramCache]: Analyzing trace with hash -403396494, now seen corresponding path program 13 times [2021-04-15 03:43:03,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:43:03,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705985310] [2021-04-15 03:43:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:43:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:43:03,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705985310] [2021-04-15 03:43:03,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896118909] [2021-04-15 03:43:03,306 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 [2021-04-15 03:43:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:43:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:43:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:03,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:43:03,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-04-15 03:43:03,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962934789] [2021-04-15 03:43:03,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:43:03,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:43:03,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:43:03,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:43:03,780 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) [2021-04-15 03:43:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:43:04,304 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-04-15 03:43:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:43:04,304 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 [2021-04-15 03:43:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:43:04,546 INFO L225 Difference]: With dead ends: 60941 [2021-04-15 03:43:04,546 INFO L226 Difference]: Without dead ends: 60279 [2021-04-15 03:43:04,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:43:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-04-15 03:43:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-04-15 03:43:06,530 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) [2021-04-15 03:43:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-04-15 03:43:07,027 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-04-15 03:43:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:43:07,027 INFO L480 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-04-15 03:43:07,027 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) [2021-04-15 03:43:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-04-15 03:43:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:43:07,171 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:43:07,171 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] [2021-04-15 03:43:07,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:43:07,372 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:43:07,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:43:07,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1571777584, now seen corresponding path program 14 times [2021-04-15 03:43:07,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:43:07,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470696461] [2021-04-15 03:43:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:43:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:07,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470696461] [2021-04-15 03:43:07,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250928152] [2021-04-15 03:43:07,473 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) [2021-04-15 03:43:07,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:43:07,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:43:07,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:43:07,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:43:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:07,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:43:07,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-04-15 03:43:07,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603333110] [2021-04-15 03:43:07,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:43:07,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:43:07,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:43:07,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:43:07,659 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) [2021-04-15 03:43:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:43:09,146 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-04-15 03:43:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:43:09,148 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 [2021-04-15 03:43:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:43:10,009 INFO L225 Difference]: With dead ends: 115835 [2021-04-15 03:43:10,009 INFO L226 Difference]: Without dead ends: 115835 [2021-04-15 03:43:10,010 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:43:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-04-15 03:43:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-04-15 03:43:12,528 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) [2021-04-15 03:43:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-04-15 03:43:12,781 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-04-15 03:43:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:43:12,781 INFO L480 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-04-15 03:43:12,781 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) [2021-04-15 03:43:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-04-15 03:43:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:43:12,922 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:43:12,922 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] [2021-04-15 03:43:13,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 03:43:13,123 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:43:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:43:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash -574261100, now seen corresponding path program 15 times [2021-04-15 03:43:13,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:43:13,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454733607] [2021-04-15 03:43:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:43:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:13,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454733607] [2021-04-15 03:43:13,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953860288] [2021-04-15 03:43:13,177 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 [2021-04-15 03:43:13,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:43:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:43:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:43:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:43:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:13,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:43:13,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:43:13,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867934243] [2021-04-15 03:43:13,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:43:13,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:43:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:43:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:43:13,363 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) [2021-04-15 03:43:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:43:15,642 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-04-15 03:43:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 03:43:15,643 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 [2021-04-15 03:43:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:43:16,315 INFO L225 Difference]: With dead ends: 148781 [2021-04-15 03:43:16,315 INFO L226 Difference]: Without dead ends: 147463 [2021-04-15 03:43:16,316 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:43:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-04-15 03:43:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-04-15 03:43:20,343 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) [2021-04-15 03:43:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-04-15 03:43:20,743 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-04-15 03:43:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:43:20,743 INFO L480 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-04-15 03:43:20,743 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) [2021-04-15 03:43:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-04-15 03:43:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:43:20,940 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:43:20,940 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] [2021-04-15 03:43:21,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:43:21,141 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:43:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:43:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1053355276, now seen corresponding path program 16 times [2021-04-15 03:43:21,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:43:21,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887294456] [2021-04-15 03:43:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:43:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:21,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887294456] [2021-04-15 03:43:21,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760519285] [2021-04-15 03:43:21,189 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 [2021-04-15 03:43:21,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:43:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:43:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:43:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:43:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:21,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:43:21,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-04-15 03:43:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142868017] [2021-04-15 03:43:21,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:43:21,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:43:21,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:43:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:43:21,393 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) [2021-04-15 03:43:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:43:24,199 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-04-15 03:43:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:43:24,199 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 [2021-04-15 03:43:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:43:25,043 INFO L225 Difference]: With dead ends: 170107 [2021-04-15 03:43:25,043 INFO L226 Difference]: Without dead ends: 170087 [2021-04-15 03:43:25,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 882.9ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:43:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-04-15 03:43:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-04-15 03:43:29,922 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) [2021-04-15 03:43:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-04-15 03:43:31,134 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-04-15 03:43:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:43:31,134 INFO L480 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-04-15 03:43:31,134 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) [2021-04-15 03:43:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-04-15 03:43:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:43:31,477 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:43:31,477 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] [2021-04-15 03:43:31,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 03:43:31,682 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:43:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:43:31,683 INFO L82 PathProgramCache]: Analyzing trace with hash -405452624, now seen corresponding path program 17 times [2021-04-15 03:43:31,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:43:31,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137551705] [2021-04-15 03:43:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:43:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:31,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137551705] [2021-04-15 03:43:31,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069127645] [2021-04-15 03:43:31,742 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 [2021-04-15 03:43:31,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:43:31,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:43:31,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:43:31,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:43:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:31,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:43:31,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-04-15 03:43:31,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526253125] [2021-04-15 03:43:31,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:43:31,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:43:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:43:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:43:31,945 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) [2021-04-15 03:43:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:43:34,002 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-04-15 03:43:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:43:34,002 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 [2021-04-15 03:43:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:43:34,668 INFO L225 Difference]: With dead ends: 140554 [2021-04-15 03:43:34,668 INFO L226 Difference]: Without dead ends: 140250 [2021-04-15 03:43:34,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:43:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-04-15 03:43:38,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-04-15 03:43:38,895 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) [2021-04-15 03:43:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-04-15 03:43:39,487 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-04-15 03:43:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:43:39,487 INFO L480 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-04-15 03:43:39,488 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) [2021-04-15 03:43:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-04-15 03:43:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:43:39,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:43:39,713 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] [2021-04-15 03:43:39,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 03:43:39,914 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:43:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:43:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458894, now seen corresponding path program 18 times [2021-04-15 03:43:39,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:43:39,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790529249] [2021-04-15 03:43:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:43:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:43:39,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790529249] [2021-04-15 03:43:39,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993905684] [2021-04-15 03:43:39,974 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 [2021-04-15 03:43:40,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:43:40,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:43:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:43:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:43:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:40,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:43:40,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-04-15 03:43:40,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792919169] [2021-04-15 03:43:40,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:43:40,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:43:40,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:43:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:43:40,150 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) [2021-04-15 03:43:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:43:42,148 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-04-15 03:43:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:43:42,149 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 [2021-04-15 03:43:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:43:42,883 INFO L225 Difference]: With dead ends: 157433 [2021-04-15 03:43:42,883 INFO L226 Difference]: Without dead ends: 156538 [2021-04-15 03:43:42,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:43:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-04-15 03:43:47,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-04-15 03:43:47,869 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) [2021-04-15 03:43:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-04-15 03:43:49,164 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-04-15 03:43:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:43:49,164 INFO L480 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-04-15 03:43:49,164 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) [2021-04-15 03:43:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-04-15 03:43:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:43:49,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:43:49,419 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] [2021-04-15 03:43:49,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 03:43:49,620 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:43:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:43:49,620 INFO L82 PathProgramCache]: Analyzing trace with hash -564059436, now seen corresponding path program 19 times [2021-04-15 03:43:49,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:43:49,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604715937] [2021-04-15 03:43:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:43:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:49,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604715937] [2021-04-15 03:43:49,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211175261] [2021-04-15 03:43:49,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:43:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:43:49,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:43:49,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:43:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:43:49,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:43:49,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 03:43:49,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766225345] [2021-04-15 03:43:49,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:43:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:43:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:43:49,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:43:49,814 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) [2021-04-15 03:43:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:43:52,344 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-04-15 03:43:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:43:52,345 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 [2021-04-15 03:43:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:43:54,007 INFO L225 Difference]: With dead ends: 192417 [2021-04-15 03:43:54,011 INFO L226 Difference]: Without dead ends: 191725 [2021-04-15 03:43:54,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:43:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-04-15 03:43:59,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-04-15 03:43:59,395 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) [2021-04-15 03:43:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-04-15 03:43:59,882 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-04-15 03:43:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:43:59,882 INFO L480 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-04-15 03:43:59,882 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) [2021-04-15 03:43:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-04-15 03:44:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:44:00,084 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:00,085 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] [2021-04-15 03:44:00,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 03:44:00,285 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash -689678634, now seen corresponding path program 20 times [2021-04-15 03:44:00,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:00,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414954014] [2021-04-15 03:44:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:44:00,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414954014] [2021-04-15 03:44:00,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814336687] [2021-04-15 03:44:00,336 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 [2021-04-15 03:44:00,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:44:00,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:00,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:44:00,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:00,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:00,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:44:00,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972525042] [2021-04-15 03:44:00,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:44:00,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:00,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:44:00,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:44:00,498 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) [2021-04-15 03:44:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:03,373 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-04-15 03:44:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:44:03,373 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 [2021-04-15 03:44:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:04,334 INFO L225 Difference]: With dead ends: 221192 [2021-04-15 03:44:04,334 INFO L226 Difference]: Without dead ends: 221192 [2021-04-15 03:44:04,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 946.1ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:44:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-04-15 03:44:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-04-15 03:44:09,231 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) [2021-04-15 03:44:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-04-15 03:44:10,443 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-04-15 03:44:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:10,443 INFO L480 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-04-15 03:44:10,444 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) [2021-04-15 03:44:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-04-15 03:44:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:44:10,665 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:10,665 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] [2021-04-15 03:44:10,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 03:44:10,866 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:10,866 INFO L82 PathProgramCache]: Analyzing trace with hash -26712938, now seen corresponding path program 21 times [2021-04-15 03:44:10,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:10,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786810979] [2021-04-15 03:44:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:44:10,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786810979] [2021-04-15 03:44:10,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307686022] [2021-04-15 03:44:10,915 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 [2021-04-15 03:44:10,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:44:10,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:10,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:44:10,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:11,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:11,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 03:44:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961794099] [2021-04-15 03:44:11,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:44:11,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:11,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:44:11,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:44:11,082 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) [2021-04-15 03:44:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:13,406 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-04-15 03:44:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:44:13,406 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 [2021-04-15 03:44:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:14,420 INFO L225 Difference]: With dead ends: 149434 [2021-04-15 03:44:14,420 INFO L226 Difference]: Without dead ends: 149030 [2021-04-15 03:44:14,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:44:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-04-15 03:44:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-04-15 03:44:17,834 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) [2021-04-15 03:44:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-04-15 03:44:18,784 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-04-15 03:44:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:18,784 INFO L480 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-04-15 03:44:18,784 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) [2021-04-15 03:44:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-04-15 03:44:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:44:18,971 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:18,971 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] [2021-04-15 03:44:19,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:19,173 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:19,174 INFO L82 PathProgramCache]: Analyzing trace with hash -498320652, now seen corresponding path program 22 times [2021-04-15 03:44:19,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:19,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375499003] [2021-04-15 03:44:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:44:19,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375499003] [2021-04-15 03:44:19,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451311380] [2021-04-15 03:44:19,242 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) [2021-04-15 03:44:19,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:44:19,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:19,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:19,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:19,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 03:44:19,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915742393] [2021-04-15 03:44:19,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:44:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:44:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:44:19,447 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) [2021-04-15 03:44:22,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:22,562 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-04-15 03:44:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 03:44:22,562 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 [2021-04-15 03:44:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:23,753 INFO L225 Difference]: With dead ends: 262218 [2021-04-15 03:44:23,753 INFO L226 Difference]: Without dead ends: 262218 [2021-04-15 03:44:23,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 462.3ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:44:24,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-04-15 03:44:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-04-15 03:44:31,038 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) [2021-04-15 03:44:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-04-15 03:44:31,919 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-04-15 03:44:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:31,919 INFO L480 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-04-15 03:44:31,919 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) [2021-04-15 03:44:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-04-15 03:44:33,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:44:33,111 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:33,111 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] [2021-04-15 03:44:33,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 03:44:33,317 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2046213610, now seen corresponding path program 23 times [2021-04-15 03:44:33,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:33,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663600360] [2021-04-15 03:44:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:44:33,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663600360] [2021-04-15 03:44:33,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040886078] [2021-04-15 03:44:33,365 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 [2021-04-15 03:44:33,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:44:33,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:33,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:44:33,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:33,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:33,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-04-15 03:44:33,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522594544] [2021-04-15 03:44:33,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:44:33,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:33,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:44:33,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:44:33,505 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) [2021-04-15 03:44:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:35,888 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-04-15 03:44:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:44:35,889 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 [2021-04-15 03:44:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:37,672 INFO L225 Difference]: With dead ends: 254683 [2021-04-15 03:44:37,672 INFO L226 Difference]: Without dead ends: 254373 [2021-04-15 03:44:37,672 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:44:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-04-15 03:44:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-04-15 03:44:44,027 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) [2021-04-15 03:44:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-04-15 03:44:45,683 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-04-15 03:44:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:45,683 INFO L480 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-04-15 03:44:45,683 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) [2021-04-15 03:44:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-04-15 03:44:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:44:46,018 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:46,019 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] [2021-04-15 03:44:46,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:46,221 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1041882536, now seen corresponding path program 24 times [2021-04-15 03:44:46,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:46,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646543638] [2021-04-15 03:44:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:44:46,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646543638] [2021-04-15 03:44:46,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324024081] [2021-04-15 03:44:46,284 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 [2021-04-15 03:44:46,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:44:46,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:44:46,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:46,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:46,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 03:44:46,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202259988] [2021-04-15 03:44:46,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:44:46,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:44:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:44:46,433 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) [2021-04-15 03:44:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:50,010 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-04-15 03:44:50,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:44:50,011 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 [2021-04-15 03:44:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:51,282 INFO L225 Difference]: With dead ends: 283294 [2021-04-15 03:44:51,283 INFO L226 Difference]: Without dead ends: 282784 [2021-04-15 03:44:51,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:44:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-04-15 03:44:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-04-15 03:44:59,211 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) [2021-04-15 03:45:01,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-04-15 03:45:01,028 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-04-15 03:45:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:01,028 INFO L480 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-04-15 03:45:01,028 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) [2021-04-15 03:45:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-04-15 03:45:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:45:01,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:01,390 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] [2021-04-15 03:45:01,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 03:45:01,611 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:01,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1862781996, now seen corresponding path program 25 times [2021-04-15 03:45:01,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:01,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991257772] [2021-04-15 03:45:01,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:01,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991257772] [2021-04-15 03:45:01,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111403771] [2021-04-15 03:45:01,665 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 [2021-04-15 03:45:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:45:01,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:01,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:01,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:45:01,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592996289] [2021-04-15 03:45:01,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:45:01,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:01,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:45:01,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:45:01,836 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) [2021-04-15 03:45:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:05,489 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-04-15 03:45:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 03:45:05,490 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 [2021-04-15 03:45:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:06,858 INFO L225 Difference]: With dead ends: 290122 [2021-04-15 03:45:06,858 INFO L226 Difference]: Without dead ends: 289652 [2021-04-15 03:45:06,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 03:45:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-04-15 03:45:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-04-15 03:45:14,794 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) [2021-04-15 03:45:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-04-15 03:45:17,544 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-04-15 03:45:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:17,545 INFO L480 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-04-15 03:45:17,545 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) [2021-04-15 03:45:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-04-15 03:45:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-04-15 03:45:18,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:18,187 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] [2021-04-15 03:45:18,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 03:45:18,409 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:18,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1975565294, now seen corresponding path program 26 times [2021-04-15 03:45:18,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:18,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530975532] [2021-04-15 03:45:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:18,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530975532] [2021-04-15 03:45:18,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836276923] [2021-04-15 03:45:18,498 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 [2021-04-15 03:45:18,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:45:18,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:18,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:45:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:18,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:18,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-04-15 03:45:18,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956515903] [2021-04-15 03:45:18,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:45:18,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:18,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:45:18,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:45:18,785 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) [2021-04-15 03:45:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:22,853 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-04-15 03:45:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:45:22,854 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 [2021-04-15 03:45:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:25,061 INFO L225 Difference]: With dead ends: 275767 [2021-04-15 03:45:25,062 INFO L226 Difference]: Without dead ends: 274998 [2021-04-15 03:45:25,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:45:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-04-15 03:45:32,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-04-15 03:45:33,274 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) [2021-04-15 03:45:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-04-15 03:45:35,350 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-04-15 03:45:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:35,350 INFO L480 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-04-15 03:45:35,350 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) [2021-04-15 03:45:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-04-15 03:45:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-04-15 03:45:35,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:35,801 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] [2021-04-15 03:45:36,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 03:45:36,001 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:36,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1727044438, now seen corresponding path program 27 times [2021-04-15 03:45:36,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:36,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172457027] [2021-04-15 03:45:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:45:36,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172457027] [2021-04-15 03:45:36,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596822049] [2021-04-15 03:45:36,117 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 [2021-04-15 03:45:36,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:45:36,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:36,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:45:36,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:37,010 WARN L205 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-04-15 03:45:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:37,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:37,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-04-15 03:45:37,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741208084] [2021-04-15 03:45:37,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:45:37,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:37,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:45:37,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:45:37,066 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) [2021-04-15 03:45:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:41,059 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-04-15 03:45:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:45:41,059 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 [2021-04-15 03:45:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:42,946 INFO L225 Difference]: With dead ends: 394201 [2021-04-15 03:45:42,947 INFO L226 Difference]: Without dead ends: 392734 [2021-04-15 03:45:42,947 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 914.6ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:45:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-04-15 03:45:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-04-15 03:45:56,059 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) [2021-04-15 03:45:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-04-15 03:45:58,614 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-04-15 03:45:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:58,615 INFO L480 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-04-15 03:45:58,615 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) [2021-04-15 03:45:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-04-15 03:45:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-04-15 03:45:59,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:59,301 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] [2021-04-15 03:45:59,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 03:45:59,501 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1495021836, now seen corresponding path program 1 times [2021-04-15 03:45:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:59,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849611027] [2021-04-15 03:45:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:45:59,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849611027] [2021-04-15 03:45:59,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234419211] [2021-04-15 03:45:59,564 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) [2021-04-15 03:45:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:45:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:45:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:59,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:59,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-04-15 03:45:59,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695244339] [2021-04-15 03:45:59,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:45:59,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:59,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:45:59,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:45:59,738 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) [2021-04-15 03:46:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:07,416 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-04-15 03:46:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:46:07,417 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 [2021-04-15 03:46:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:13,209 INFO L225 Difference]: With dead ends: 586179 [2021-04-15 03:46:13,209 INFO L226 Difference]: Without dead ends: 583951 [2021-04-15 03:46:13,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:46:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-04-15 03:46:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-04-15 03:46:31,860 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) [2021-04-15 03:46:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425975 states to 425975 states and 1972884 transitions. [2021-04-15 03:46:36,194 INFO L78 Accepts]: Start accepts. Automaton has 425975 states and 1972884 transitions. Word has length 38 [2021-04-15 03:46:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:36,194 INFO L480 AbstractCegarLoop]: Abstraction has 425975 states and 1972884 transitions. [2021-04-15 03:46:36,194 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) [2021-04-15 03:46:36,195 INFO L276 IsEmpty]: Start isEmpty. Operand 425975 states and 1972884 transitions. [2021-04-15 03:46:37,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-04-15 03:46:37,219 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:37,224 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] [2021-04-15 03:46:37,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 03:46:37,428 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:37,429 INFO L82 PathProgramCache]: Analyzing trace with hash 616191154, now seen corresponding path program 28 times [2021-04-15 03:46:37,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:37,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484684410] [2021-04-15 03:46:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:46:37,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484684410] [2021-04-15 03:46:37,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096258204] [2021-04-15 03:46:37,478 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 [2021-04-15 03:46:37,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:46:37,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:46:37,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:46:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:46:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:37,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:46:37,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-04-15 03:46:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858178914] [2021-04-15 03:46:37,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:46:37,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:46:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:46:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:46:37,645 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) [2021-04-15 03:46:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:43,952 INFO L93 Difference]: Finished difference Result 560533 states and 2590081 transitions. [2021-04-15 03:46:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:46:43,952 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 [2021-04-15 03:46:43,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:48,015 INFO L225 Difference]: With dead ends: 560533 [2021-04-15 03:46:48,015 INFO L226 Difference]: Without dead ends: 559708 [2021-04-15 03:46:48,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:46:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559708 states. [2021-04-15 03:47:10,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559708 to 545995. [2021-04-15 03:47:11,757 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) [2021-04-15 03:47:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545995 states to 545995 states and 2536864 transitions. [2021-04-15 03:47:19,616 INFO L78 Accepts]: Start accepts. Automaton has 545995 states and 2536864 transitions. Word has length 38 [2021-04-15 03:47:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:19,617 INFO L480 AbstractCegarLoop]: Abstraction has 545995 states and 2536864 transitions. [2021-04-15 03:47:19,617 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) [2021-04-15 03:47:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 545995 states and 2536864 transitions. [2021-04-15 03:47:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 03:47:23,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:23,518 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] [2021-04-15 03:47:23,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:23,733 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:23,733 INFO L82 PathProgramCache]: Analyzing trace with hash -9164784, now seen corresponding path program 29 times [2021-04-15 03:47:23,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:23,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430918774] [2021-04-15 03:47:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:23,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430918774] [2021-04-15 03:47:23,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851074115] [2021-04-15 03:47:23,883 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 [2021-04-15 03:47:23,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:47:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:47:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:24,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:24,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 03:47:24,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807298023] [2021-04-15 03:47:24,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:47:24,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:24,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:47:24,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:47:24,199 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) [2021-04-15 03:47:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:36,577 INFO L93 Difference]: Finished difference Result 810316 states and 3662784 transitions. [2021-04-15 03:47:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 03:47:36,578 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 [2021-04-15 03:47:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:46,894 INFO L225 Difference]: With dead ends: 810316 [2021-04-15 03:47:46,894 INFO L226 Difference]: Without dead ends: 810316 [2021-04-15 03:47:46,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 798.3ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:47:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810316 states. [2021-04-15 03:48:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810316 to 534782. [2021-04-15 03:48:16,992 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) [2021-04-15 03:48:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534782 states to 534782 states and 2480676 transitions. [2021-04-15 03:48:22,295 INFO L78 Accepts]: Start accepts. Automaton has 534782 states and 2480676 transitions. Word has length 40 [2021-04-15 03:48:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:22,295 INFO L480 AbstractCegarLoop]: Abstraction has 534782 states and 2480676 transitions. [2021-04-15 03:48:22,295 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) [2021-04-15 03:48:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 534782 states and 2480676 transitions. [2021-04-15 03:48:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 03:48:23,759 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:23,759 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] [2021-04-15 03:48:23,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 03:48:23,960 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:23,961 INFO L82 PathProgramCache]: Analyzing trace with hash 826469332, now seen corresponding path program 30 times [2021-04-15 03:48:23,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:23,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930284315] [2021-04-15 03:48:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:24,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930284315] [2021-04-15 03:48:24,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131877657] [2021-04-15 03:48:24,057 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) [2021-04-15 03:48:24,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:48:24,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:24,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:48:24,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:24,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:24,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:48:24,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027319573] [2021-04-15 03:48:24,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:48:24,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:24,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:48:24,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:48:24,292 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) [2021-04-15 03:48:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:44,920 INFO L93 Difference]: Finished difference Result 1136355 states and 5157666 transitions. [2021-04-15 03:48:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 03:48:44,920 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 [2021-04-15 03:48:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:53,680 INFO L225 Difference]: With dead ends: 1136355 [2021-04-15 03:48:53,680 INFO L226 Difference]: Without dead ends: 1133906 [2021-04-15 03:48:53,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1132.4ms TimeCoverageRelationStatistics Valid=1280, Invalid=3976, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 03:48:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133906 states. [2021-04-15 03:49:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133906 to 706666. [2021-04-15 03:49:49,101 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) [2021-04-15 03:50:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706666 states to 706666 states and 3293070 transitions. [2021-04-15 03:50:00,728 INFO L78 Accepts]: Start accepts. Automaton has 706666 states and 3293070 transitions. Word has length 40 [2021-04-15 03:50:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:50:00,728 INFO L480 AbstractCegarLoop]: Abstraction has 706666 states and 3293070 transitions. [2021-04-15 03:50:00,728 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) [2021-04-15 03:50:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 706666 states and 3293070 transitions. [2021-04-15 03:50:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 03:50:05,569 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:50:05,569 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] [2021-04-15 03:50:05,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 03:50:05,789 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:50:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:50:05,790 INFO L82 PathProgramCache]: Analyzing trace with hash -686057356, now seen corresponding path program 31 times [2021-04-15 03:50:05,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:50:05,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778381016] [2021-04-15 03:50:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:50:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:50:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:05,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778381016] [2021-04-15 03:50:05,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321658284] [2021-04-15 03:50:05,927 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 [2021-04-15 03:50:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:50:05,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:50:05,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:50:06,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:06,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:50:06,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 03:50:06,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158793759] [2021-04-15 03:50:06,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:50:06,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:50:06,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:50:06,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:50:06,197 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)