/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/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:15:38,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:15:38,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:15:38,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:15:38,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:15:38,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:15:38,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:15:38,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:15:38,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:15:38,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:15:38,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:15:38,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:15:38,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:15:38,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:15:38,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:15:38,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:15:38,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:15:38,899 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 [2021-02-19 17:15:38,921 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:15:38,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:15:38,921 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:15:38,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:15:38,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:15:38,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:15:38,924 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:15:38,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:15:38,924 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:15:38,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:15:38,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:15:38,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:15:38,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:15:38,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:15:38,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:15:38,925 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:15:38,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:15:38,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:15:38,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:15:38,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:15:38,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:15:38,927 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:15:38,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:15:38,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:15:39,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:15:39,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:15:39,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:15:39,189 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:15:39,190 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:15:39,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-02-19 17:15:39,190 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-02-19 17:15:39,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:15:39,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:15:39,581 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:15:39,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:15:39,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:15:39,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:15:39,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:15:39,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:15:39,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:15:39,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:15:39,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:15:39,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:15:39,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:15:39,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (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 [2021-02-19 17:15:39,703 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:15:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:15:39,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:15:39,703 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:15:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:15:39,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:15:39,703 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:15:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:15:39,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:15:39,704 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:15:39,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:15:39,864 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:15:39,865 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:15:39 BoogieIcfgContainer [2021-02-19 17:15:39,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:15:39,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:15:39,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:15:39,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:15:39,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/2) ... [2021-02-19 17:15:39,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f5c6eb and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:15:39, skipping insertion in model container [2021-02-19 17:15:39,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:15:39" (2/2) ... [2021-02-19 17:15:39,870 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-02-19 17:15:39,874 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:15:39,874 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:15:39,877 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:15:39,878 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:15:39,901 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 17:15:39,928 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 17:15:39,941 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:15:39,941 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:15:39,942 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:15:39,942 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:15:39,942 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:15:39,942 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:15:39,942 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:15:39,942 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:15:39,948 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-02-19 17:15:39,962 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:15:39,968 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:39,968 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:39,969 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:39,972 INFO L82 PathProgramCache]: Analyzing trace with hash -169700644, now seen corresponding path program 1 times [2021-02-19 17:15:39,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:39,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361435292] [2021-02-19 17:15:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361435292] [2021-02-19 17:15:40,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:40,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 17:15:40,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641001218] [2021-02-19 17:15:40,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:15:40,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:15:40,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:15:40,083 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 2.207547169811321) internal successors, (117), 54 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,127 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-02-19 17:15:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:15:40,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-02-19 17:15:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,138 INFO L225 Difference]: With dead ends: 102 [2021-02-19 17:15:40,138 INFO L226 Difference]: Without dead ends: 95 [2021-02-19 17:15:40,139 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:15:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-19 17:15:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-02-19 17:15:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-02-19 17:15:40,184 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-02-19 17:15:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:40,185 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-02-19 17:15:40,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-02-19 17:15:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:15:40,188 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,188 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:40,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:15:40,189 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:40,190 INFO L82 PathProgramCache]: Analyzing trace with hash -214361449, now seen corresponding path program 1 times [2021-02-19 17:15:40,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:40,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156519164] [2021-02-19 17:15:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156519164] [2021-02-19 17:15:40,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:40,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:15:40,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753069951] [2021-02-19 17:15:40,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:15:40,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:15:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:40,279 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,377 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2021-02-19 17:15:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:40,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:15:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,383 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:15:40,383 INFO L226 Difference]: Without dead ends: 160 [2021-02-19 17:15:40,384 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-19 17:15:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-02-19 17:15:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-02-19 17:15:40,404 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-02-19 17:15:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:40,404 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-02-19 17:15:40,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-02-19 17:15:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:15:40,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,406 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:40,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:15:40,406 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:40,408 INFO L82 PathProgramCache]: Analyzing trace with hash -632263876, now seen corresponding path program 1 times [2021-02-19 17:15:40,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:40,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956191878] [2021-02-19 17:15:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956191878] [2021-02-19 17:15:40,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291992690] [2021-02-19 17:15:40,479 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 [2021-02-19 17:15:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:15:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:40,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-02-19 17:15:40,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090608803] [2021-02-19 17:15:40,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:15:40,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:15:40,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:40,648 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,706 INFO L93 Difference]: Finished difference Result 176 states and 390 transitions. [2021-02-19 17:15:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:15:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,709 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:15:40,711 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 17:15:40,711 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 17:15:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 103. [2021-02-19 17:15:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.3137254901960786) internal successors, (236), 102 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 236 transitions. [2021-02-19 17:15:40,726 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 236 transitions. Word has length 14 [2021-02-19 17:15:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:40,729 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 236 transitions. [2021-02-19 17:15:40,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 236 transitions. [2021-02-19 17:15:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:15:40,730 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,730 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:40,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 17:15:40,931 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:40,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:40,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640081, now seen corresponding path program 2 times [2021-02-19 17:15:40,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:40,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612705084] [2021-02-19 17:15:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612705084] [2021-02-19 17:15:40,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:40,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:15:40,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10381216] [2021-02-19 17:15:40,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:15:40,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:15:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:40,956 INFO L87 Difference]: Start difference. First operand 103 states and 236 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,997 INFO L93 Difference]: Finished difference Result 144 states and 333 transitions. [2021-02-19 17:15:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:15:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:15:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,998 INFO L225 Difference]: With dead ends: 144 [2021-02-19 17:15:40,999 INFO L226 Difference]: Without dead ends: 142 [2021-02-19 17:15:40,999 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-02-19 17:15:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-02-19 17:15:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.303921568627451) internal successors, (235), 102 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 235 transitions. [2021-02-19 17:15:41,006 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 235 transitions. Word has length 14 [2021-02-19 17:15:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:41,006 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 235 transitions. [2021-02-19 17:15:41,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 235 transitions. [2021-02-19 17:15:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:15:41,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:41,009 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:41,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:15:41,010 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1531630358, now seen corresponding path program 2 times [2021-02-19 17:15:41,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:41,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62344666] [2021-02-19 17:15:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:41,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62344666] [2021-02-19 17:15:41,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:41,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:15:41,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447384367] [2021-02-19 17:15:41,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:15:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:15:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:41,041 INFO L87 Difference]: Start difference. First operand 103 states and 235 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:41,068 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2021-02-19 17:15:41,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:15:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:15:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:41,069 INFO L225 Difference]: With dead ends: 144 [2021-02-19 17:15:41,069 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 17:15:41,070 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 17:15:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 103. [2021-02-19 17:15:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-02-19 17:15:41,072 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-02-19 17:15:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:41,072 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-02-19 17:15:41,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-02-19 17:15:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:41,073 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:41,073 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:41,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:15:41,073 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:41,073 INFO L82 PathProgramCache]: Analyzing trace with hash -10930041, now seen corresponding path program 1 times [2021-02-19 17:15:41,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:41,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487391544] [2021-02-19 17:15:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487391544] [2021-02-19 17:15:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837936716] [2021-02-19 17:15:41,115 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 [2021-02-19 17:15:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:41,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:41,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:41,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-02-19 17:15:41,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363017087] [2021-02-19 17:15:41,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:15:41,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:15:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:41,249 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:41,292 INFO L93 Difference]: Finished difference Result 200 states and 450 transitions. [2021-02-19 17:15:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:15:41,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:15:41,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:41,293 INFO L225 Difference]: With dead ends: 200 [2021-02-19 17:15:41,293 INFO L226 Difference]: Without dead ends: 193 [2021-02-19 17:15:41,294 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-02-19 17:15:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 143. [2021-02-19 17:15:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-02-19 17:15:41,303 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-02-19 17:15:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:41,303 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-02-19 17:15:41,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-02-19 17:15:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:41,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:41,305 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:41,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:41,522 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:41,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583321, now seen corresponding path program 1 times [2021-02-19 17:15:41,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:41,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746976074] [2021-02-19 17:15:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:41,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746976074] [2021-02-19 17:15:41,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057620661] [2021-02-19 17:15:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:41,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:41,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-02-19 17:15:41,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976363336] [2021-02-19 17:15:41,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:41,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:41,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:41,638 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:41,698 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-02-19 17:15:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:15:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:15:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:41,699 INFO L225 Difference]: With dead ends: 248 [2021-02-19 17:15:41,699 INFO L226 Difference]: Without dead ends: 248 [2021-02-19 17:15:41,699 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-02-19 17:15:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-02-19 17:15:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-02-19 17:15:41,704 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-02-19 17:15:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:41,704 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-02-19 17:15:41,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-02-19 17:15:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:41,705 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:41,705 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:41,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:41,918 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:41,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184671, now seen corresponding path program 2 times [2021-02-19 17:15:41,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:41,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579048875] [2021-02-19 17:15:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:41,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579048875] [2021-02-19 17:15:41,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:41,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:15:41,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827426673] [2021-02-19 17:15:41,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:15:41,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:15:41,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:41,964 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:41,995 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-02-19 17:15:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:15:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:15:41,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:41,997 INFO L225 Difference]: With dead ends: 311 [2021-02-19 17:15:41,997 INFO L226 Difference]: Without dead ends: 304 [2021-02-19 17:15:41,997 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-02-19 17:15:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-02-19 17:15:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-02-19 17:15:42,003 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-02-19 17:15:42,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:42,003 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-02-19 17:15:42,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-02-19 17:15:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:42,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:42,004 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:42,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:15:42,004 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798681, now seen corresponding path program 1 times [2021-02-19 17:15:42,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:42,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172970770] [2021-02-19 17:15:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:42,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172970770] [2021-02-19 17:15:42,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:42,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:15:42,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193494381] [2021-02-19 17:15:42,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:15:42,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:15:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:42,029 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:42,056 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-02-19 17:15:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:15:42,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:15:42,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:42,058 INFO L225 Difference]: With dead ends: 243 [2021-02-19 17:15:42,058 INFO L226 Difference]: Without dead ends: 208 [2021-02-19 17:15:42,058 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-02-19 17:15:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-02-19 17:15:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-02-19 17:15:42,072 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-02-19 17:15:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:42,072 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-02-19 17:15:42,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-02-19 17:15:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:42,072 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:42,072 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:42,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 17:15:42,072 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262119, now seen corresponding path program 2 times [2021-02-19 17:15:42,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:42,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921812408] [2021-02-19 17:15:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:42,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921812408] [2021-02-19 17:15:42,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:42,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:15:42,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046327377] [2021-02-19 17:15:42,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:15:42,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:15:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:42,119 INFO L87 Difference]: Start difference. First operand 208 states and 497 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:42,152 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-02-19 17:15:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:15:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:42,155 INFO L225 Difference]: With dead ends: 222 [2021-02-19 17:15:42,155 INFO L226 Difference]: Without dead ends: 222 [2021-02-19 17:15:42,155 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-02-19 17:15:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-02-19 17:15:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-02-19 17:15:42,160 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-02-19 17:15:42,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:42,160 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-02-19 17:15:42,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-02-19 17:15:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:42,161 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:42,161 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:42,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:15:42,161 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash 215291031, now seen corresponding path program 3 times [2021-02-19 17:15:42,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:42,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560813002] [2021-02-19 17:15:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:42,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560813002] [2021-02-19 17:15:42,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581591410] [2021-02-19 17:15:42,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:42,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:42,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:42,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:15:42,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:42,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 17:15:42,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-02-19 17:15:42,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962239463] [2021-02-19 17:15:42,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:15:42,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:42,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:15:42,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:42,520 INFO L87 Difference]: Start difference. First operand 222 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:42,690 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-02-19 17:15:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:15:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:42,692 INFO L225 Difference]: With dead ends: 421 [2021-02-19 17:15:42,692 INFO L226 Difference]: Without dead ends: 414 [2021-02-19 17:15:42,692 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:15:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-02-19 17:15:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-02-19 17:15:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-02-19 17:15:42,698 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-02-19 17:15:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:42,698 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-02-19 17:15:42,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-02-19 17:15:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:42,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:42,698 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:42,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:42,906 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:42,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788137, now seen corresponding path program 4 times [2021-02-19 17:15:42,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:42,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747136061] [2021-02-19 17:15:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747136061] [2021-02-19 17:15:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160661734] [2021-02-19 17:15:42,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:42,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:15:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:43,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 17:15:43,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-02-19 17:15:43,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929892811] [2021-02-19 17:15:43,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:43,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:43,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:43,072 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:43,185 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-02-19 17:15:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:15:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:43,188 INFO L225 Difference]: With dead ends: 592 [2021-02-19 17:15:43,188 INFO L226 Difference]: Without dead ends: 592 [2021-02-19 17:15:43,189 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:15:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-02-19 17:15:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-02-19 17:15:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-02-19 17:15:43,197 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-02-19 17:15:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:43,197 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-02-19 17:15:43,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-02-19 17:15:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:43,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:43,198 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:43,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 17:15:43,398 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963599, now seen corresponding path program 5 times [2021-02-19 17:15:43,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:43,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238672723] [2021-02-19 17:15:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:43,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238672723] [2021-02-19 17:15:43,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062860021] [2021-02-19 17:15:43,432 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 [2021-02-19 17:15:43,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:15:43,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:43,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:43,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:43,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-02-19 17:15:43,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840230627] [2021-02-19 17:15:43,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:43,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:43,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:43,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:43,503 INFO L87 Difference]: Start difference. First operand 376 states and 953 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:43,606 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-02-19 17:15:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:43,611 INFO L225 Difference]: With dead ends: 751 [2021-02-19 17:15:43,611 INFO L226 Difference]: Without dead ends: 751 [2021-02-19 17:15:43,611 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:15:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-02-19 17:15:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-02-19 17:15:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-02-19 17:15:43,622 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-02-19 17:15:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:43,623 INFO L480 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-02-19 17:15:43,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-02-19 17:15:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:43,624 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:43,624 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:43,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:43,842 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435428, now seen corresponding path program 6 times [2021-02-19 17:15:43,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:43,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76082446] [2021-02-19 17:15:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:43,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76082446] [2021-02-19 17:15:43,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809342397] [2021-02-19 17:15:43,878 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 [2021-02-19 17:15:43,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:15:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:43,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:43,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:43,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:43,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-02-19 17:15:43,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616842227] [2021-02-19 17:15:43,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:43,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:43,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:43,956 INFO L87 Difference]: Start difference. First operand 527 states and 1399 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:44,022 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-02-19 17:15:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:15:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:44,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:44,026 INFO L225 Difference]: With dead ends: 960 [2021-02-19 17:15:44,026 INFO L226 Difference]: Without dead ends: 956 [2021-02-19 17:15:44,026 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-02-19 17:15:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-02-19 17:15:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-02-19 17:15:44,041 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-02-19 17:15:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:44,042 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-02-19 17:15:44,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-02-19 17:15:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:44,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:44,044 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:44,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:44,262 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555018, now seen corresponding path program 7 times [2021-02-19 17:15:44,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466502801] [2021-02-19 17:15:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:44,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466502801] [2021-02-19 17:15:44,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667024729] [2021-02-19 17:15:44,300 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 [2021-02-19 17:15:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:44,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:44,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-02-19 17:15:44,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724998817] [2021-02-19 17:15:44,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:44,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:44,370 INFO L87 Difference]: Start difference. First operand 785 states and 2158 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:44,466 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-02-19 17:15:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:15:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:44,470 INFO L225 Difference]: With dead ends: 966 [2021-02-19 17:15:44,470 INFO L226 Difference]: Without dead ends: 966 [2021-02-19 17:15:44,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-02-19 17:15:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-02-19 17:15:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-02-19 17:15:44,489 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-02-19 17:15:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:44,489 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-02-19 17:15:44,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-02-19 17:15:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:44,491 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:44,491 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:44,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 17:15:44,709 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:44,710 INFO L82 PathProgramCache]: Analyzing trace with hash 322738571, now seen corresponding path program 8 times [2021-02-19 17:15:44,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:44,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855265060] [2021-02-19 17:15:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:44,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855265060] [2021-02-19 17:15:44,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068563145] [2021-02-19 17:15:44,734 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 [2021-02-19 17:15:44,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:44,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:44,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:44,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:44,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 17:15:44,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953455790] [2021-02-19 17:15:44,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:15:44,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:15:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:44,811 INFO L87 Difference]: Start difference. First operand 785 states and 2148 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:44,855 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-02-19 17:15:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:44,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:44,860 INFO L225 Difference]: With dead ends: 861 [2021-02-19 17:15:44,860 INFO L226 Difference]: Without dead ends: 858 [2021-02-19 17:15:44,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:44,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-02-19 17:15:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-02-19 17:15:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-02-19 17:15:44,874 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-02-19 17:15:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:44,874 INFO L480 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-02-19 17:15:44,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-02-19 17:15:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:44,876 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:44,876 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:45,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:45,090 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166697, now seen corresponding path program 9 times [2021-02-19 17:15:45,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:45,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730856794] [2021-02-19 17:15:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:45,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730856794] [2021-02-19 17:15:45,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694865990] [2021-02-19 17:15:45,116 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 [2021-02-19 17:15:45,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:45,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:45,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:45,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:45,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:45,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 17:15:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822036644] [2021-02-19 17:15:45,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:15:45,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:45,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:15:45,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:45,238 INFO L87 Difference]: Start difference. First operand 781 states and 2133 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:45,310 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-02-19 17:15:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:45,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:45,314 INFO L225 Difference]: With dead ends: 1114 [2021-02-19 17:15:45,314 INFO L226 Difference]: Without dead ends: 1114 [2021-02-19 17:15:45,314 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-02-19 17:15:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-02-19 17:15:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-02-19 17:15:45,330 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-02-19 17:15:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:45,330 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-02-19 17:15:45,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-02-19 17:15:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:45,331 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:45,331 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:45,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 17:15:45,548 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542902, now seen corresponding path program 10 times [2021-02-19 17:15:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:45,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408545463] [2021-02-19 17:15:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:45,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408545463] [2021-02-19 17:15:45,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211110288] [2021-02-19 17:15:45,578 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 [2021-02-19 17:15:45,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:45,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:45,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:45,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:45,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-02-19 17:15:45,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414164933] [2021-02-19 17:15:45,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:45,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:45,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:45,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:45,650 INFO L87 Difference]: Start difference. First operand 899 states and 2489 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:45,721 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-02-19 17:15:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:45,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:45,726 INFO L225 Difference]: With dead ends: 1380 [2021-02-19 17:15:45,726 INFO L226 Difference]: Without dead ends: 1370 [2021-02-19 17:15:45,726 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:45,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-02-19 17:15:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-02-19 17:15:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-02-19 17:15:45,748 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-02-19 17:15:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:45,748 INFO L480 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-02-19 17:15:45,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-02-19 17:15:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:45,749 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:45,749 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:45,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 17:15:45,958 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2038543984, now seen corresponding path program 11 times [2021-02-19 17:15:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:45,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301097193] [2021-02-19 17:15:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:45,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301097193] [2021-02-19 17:15:45,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943001557] [2021-02-19 17:15:45,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:15:46,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:15:46,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:46,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:46,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:46,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:46,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-02-19 17:15:46,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114613876] [2021-02-19 17:15:46,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:46,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:46,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:46,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:46,055 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:46,147 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-02-19 17:15:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:15:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:46,151 INFO L225 Difference]: With dead ends: 1400 [2021-02-19 17:15:46,151 INFO L226 Difference]: Without dead ends: 1400 [2021-02-19 17:15:46,152 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-02-19 17:15:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-02-19 17:15:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-02-19 17:15:46,176 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-02-19 17:15:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:46,176 INFO L480 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-02-19 17:15:46,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-02-19 17:15:46,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:46,179 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:46,179 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:46,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 17:15:46,380 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:46,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727537, now seen corresponding path program 12 times [2021-02-19 17:15:46,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:46,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356169153] [2021-02-19 17:15:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:46,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356169153] [2021-02-19 17:15:46,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31433091] [2021-02-19 17:15:46,403 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 [2021-02-19 17:15:46,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:15:46,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:46,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:46,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 17:15:46,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962122054] [2021-02-19 17:15:46,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:15:46,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:46,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:15:46,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:46,465 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:46,512 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-02-19 17:15:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:46,516 INFO L225 Difference]: With dead ends: 1485 [2021-02-19 17:15:46,516 INFO L226 Difference]: Without dead ends: 1482 [2021-02-19 17:15:46,516 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-02-19 17:15:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-02-19 17:15:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-02-19 17:15:46,541 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-02-19 17:15:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:46,541 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-02-19 17:15:46,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-02-19 17:15:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:46,543 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:46,543 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:46,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:46,754 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash 400971528, now seen corresponding path program 13 times [2021-02-19 17:15:46,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:46,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109096534] [2021-02-19 17:15:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:46,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109096534] [2021-02-19 17:15:46,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220217646] [2021-02-19 17:15:46,795 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 [2021-02-19 17:15:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:46,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:46,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:46,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-02-19 17:15:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967498683] [2021-02-19 17:15:46,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:46,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:46,854 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:46,948 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-02-19 17:15:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:46,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:46,954 INFO L225 Difference]: With dead ends: 1426 [2021-02-19 17:15:46,954 INFO L226 Difference]: Without dead ends: 1426 [2021-02-19 17:15:46,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:15:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-02-19 17:15:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-02-19 17:15:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-02-19 17:15:46,973 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-02-19 17:15:46,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:46,974 INFO L480 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-02-19 17:15:46,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-02-19 17:15:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:15:46,976 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:46,976 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:47,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:47,191 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790103, now seen corresponding path program 14 times [2021-02-19 17:15:47,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:47,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585312962] [2021-02-19 17:15:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:47,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585312962] [2021-02-19 17:15:47,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591646777] [2021-02-19 17:15:47,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:47,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:47,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:15:47,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:47,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:47,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 17:15:47,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673190963] [2021-02-19 17:15:47,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:47,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:47,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:47,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:47,318 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:47,374 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-02-19 17:15:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:15:47,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:15:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:47,378 INFO L225 Difference]: With dead ends: 1396 [2021-02-19 17:15:47,378 INFO L226 Difference]: Without dead ends: 1382 [2021-02-19 17:15:47,379 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-02-19 17:15:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-02-19 17:15:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-02-19 17:15:47,398 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-02-19 17:15:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:47,398 INFO L480 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-02-19 17:15:47,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-02-19 17:15:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:47,399 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:47,400 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:47,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 17:15:47,618 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983756, now seen corresponding path program 1 times [2021-02-19 17:15:47,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:47,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567924871] [2021-02-19 17:15:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:47,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567924871] [2021-02-19 17:15:47,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083289192] [2021-02-19 17:15:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:47,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:15:47,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:47,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:15:47,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 17:15:47,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:15:47,769 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-02-19 17:15:47,769 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:15:47,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:15:47,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-02-19 17:15:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:47,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:47,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:15:47,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082099957] [2021-02-19 17:15:47,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:15:47,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:47,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:15:47,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:47,778 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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) [2021-02-19 17:15:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:47,949 INFO L93 Difference]: Finished difference Result 2021 states and 5186 transitions. [2021-02-19 17:15:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:15:47,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 23 [2021-02-19 17:15:47,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:47,956 INFO L225 Difference]: With dead ends: 2021 [2021-02-19 17:15:47,956 INFO L226 Difference]: Without dead ends: 2014 [2021-02-19 17:15:47,956 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-02-19 17:15:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1712. [2021-02-19 17:15:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1711 states have (on average 2.679135008766803) internal successors, (4584), 1711 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 4584 transitions. [2021-02-19 17:15:47,985 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 4584 transitions. Word has length 23 [2021-02-19 17:15:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:47,986 INFO L480 AbstractCegarLoop]: Abstraction has 1712 states and 4584 transitions. [2021-02-19 17:15:47,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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) [2021-02-19 17:15:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 4584 transitions. [2021-02-19 17:15:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:47,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:47,991 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:48,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:48,206 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash -877014574, now seen corresponding path program 15 times [2021-02-19 17:15:48,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:48,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121880689] [2021-02-19 17:15:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:15:48,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121880689] [2021-02-19 17:15:48,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969124484] [2021-02-19 17:15:48,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:48,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:48,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:15:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:15:48,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:48,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 17:15:48,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927779298] [2021-02-19 17:15:48,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:15:48,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:48,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:15:48,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:48,313 INFO L87 Difference]: Start difference. First operand 1712 states and 4584 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:48,365 INFO L93 Difference]: Finished difference Result 2070 states and 5461 transitions. [2021-02-19 17:15:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:48,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:15:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:48,371 INFO L225 Difference]: With dead ends: 2070 [2021-02-19 17:15:48,371 INFO L226 Difference]: Without dead ends: 2063 [2021-02-19 17:15:48,372 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:48,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-02-19 17:15:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1834. [2021-02-19 17:15:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 2.6879432624113475) internal successors, (4927), 1833 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 4927 transitions. [2021-02-19 17:15:48,402 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 4927 transitions. Word has length 23 [2021-02-19 17:15:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:48,402 INFO L480 AbstractCegarLoop]: Abstraction has 1834 states and 4927 transitions. [2021-02-19 17:15:48,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 4927 transitions. [2021-02-19 17:15:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:48,404 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:48,404 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:48,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 17:15:48,618 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:48,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662708, now seen corresponding path program 1 times [2021-02-19 17:15:48,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:48,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747366848] [2021-02-19 17:15:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:48,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747366848] [2021-02-19 17:15:48,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024358062] [2021-02-19 17:15:48,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-02-19 17:15:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:48,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:48,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:48,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:48,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:15:48,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571375769] [2021-02-19 17:15:48,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:15:48,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:48,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:15:48,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:48,768 INFO L87 Difference]: Start difference. First operand 1834 states and 4927 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:48,876 INFO L93 Difference]: Finished difference Result 1663 states and 4254 transitions. [2021-02-19 17:15:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:15:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:48,886 INFO L225 Difference]: With dead ends: 1663 [2021-02-19 17:15:48,886 INFO L226 Difference]: Without dead ends: 1544 [2021-02-19 17:15:48,886 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-02-19 17:15:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 979. [2021-02-19 17:15:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 2.6768916155419222) internal successors, (2618), 978 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 2618 transitions. [2021-02-19 17:15:48,912 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 2618 transitions. Word has length 23 [2021-02-19 17:15:48,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:48,913 INFO L480 AbstractCegarLoop]: Abstraction has 979 states and 2618 transitions. [2021-02-19 17:15:48,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 2618 transitions. [2021-02-19 17:15:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:48,926 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:48,926 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:49,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 17:15:49,142 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587776, now seen corresponding path program 2 times [2021-02-19 17:15:49,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:49,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775271508] [2021-02-19 17:15:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:49,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775271508] [2021-02-19 17:15:49,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568899393] [2021-02-19 17:15:49,181 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:49,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:49,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:15:49,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:49,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:49,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 17:15:49,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682202430] [2021-02-19 17:15:49,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:15:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:49,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:15:49,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:15:49,264 INFO L87 Difference]: Start difference. First operand 979 states and 2618 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:49,384 INFO L93 Difference]: Finished difference Result 1181 states and 3013 transitions. [2021-02-19 17:15:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:15:49,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:15:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:49,386 INFO L225 Difference]: With dead ends: 1181 [2021-02-19 17:15:49,386 INFO L226 Difference]: Without dead ends: 1181 [2021-02-19 17:15:49,387 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:15:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-02-19 17:15:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1006. [2021-02-19 17:15:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 2.6676616915422886) internal successors, (2681), 1005 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 2681 transitions. [2021-02-19 17:15:49,400 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 2681 transitions. Word has length 23 [2021-02-19 17:15:49,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:49,400 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 2681 transitions. [2021-02-19 17:15:49,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2681 transitions. [2021-02-19 17:15:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:49,402 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:49,402 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:49,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 17:15:49,617 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:49,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:49,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503751, now seen corresponding path program 2 times [2021-02-19 17:15:49,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:49,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789756089] [2021-02-19 17:15:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:49,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789756089] [2021-02-19 17:15:49,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679727114] [2021-02-19 17:15:49,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:49,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 17:15:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:49,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:49,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-02-19 17:15:49,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136580513] [2021-02-19 17:15:49,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:15:49,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:15:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:49,729 INFO L87 Difference]: Start difference. First operand 1006 states and 2681 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-02-19 17:15:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:49,810 INFO L93 Difference]: Finished difference Result 1238 states and 3153 transitions. [2021-02-19 17:15:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 23 [2021-02-19 17:15:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:49,812 INFO L225 Difference]: With dead ends: 1238 [2021-02-19 17:15:49,812 INFO L226 Difference]: Without dead ends: 1216 [2021-02-19 17:15:49,812 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:15:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-02-19 17:15:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1010. [2021-02-19 17:15:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.653121902874133) internal successors, (2677), 1009 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2677 transitions. [2021-02-19 17:15:49,826 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2677 transitions. Word has length 23 [2021-02-19 17:15:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:49,826 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 2677 transitions. [2021-02-19 17:15:49,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-02-19 17:15:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2677 transitions. [2021-02-19 17:15:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:49,827 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:49,827 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:50,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 17:15:50,044 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:50,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804108, now seen corresponding path program 3 times [2021-02-19 17:15:50,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:50,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246084368] [2021-02-19 17:15:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:50,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246084368] [2021-02-19 17:15:50,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459138306] [2021-02-19 17:15:50,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:50,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:50,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:50,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:15:50,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:50,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:50,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-02-19 17:15:50,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752749309] [2021-02-19 17:15:50,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:15:50,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:50,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:15:50,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:15:50,174 INFO L87 Difference]: Start difference. First operand 1010 states and 2677 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:50,321 INFO L93 Difference]: Finished difference Result 1387 states and 3443 transitions. [2021-02-19 17:15:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:15:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:15:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:50,323 INFO L225 Difference]: With dead ends: 1387 [2021-02-19 17:15:50,323 INFO L226 Difference]: Without dead ends: 1373 [2021-02-19 17:15:50,323 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:15:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-02-19 17:15:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1053. [2021-02-19 17:15:50,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.634980988593156) internal successors, (2772), 1052 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2772 transitions. [2021-02-19 17:15:50,346 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2772 transitions. Word has length 23 [2021-02-19 17:15:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:50,346 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 2772 transitions. [2021-02-19 17:15:50,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2772 transitions. [2021-02-19 17:15:50,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:50,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:50,348 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:50,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-02-19 17:15:50,562 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:50,562 INFO L82 PathProgramCache]: Analyzing trace with hash -56471116, now seen corresponding path program 3 times [2021-02-19 17:15:50,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:50,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181004435] [2021-02-19 17:15:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181004435] [2021-02-19 17:15:50,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:50,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:15:50,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966890554] [2021-02-19 17:15:50,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:15:50,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:50,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:15:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:50,613 INFO L87 Difference]: Start difference. First operand 1053 states and 2772 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:50,650 INFO L93 Difference]: Finished difference Result 1076 states and 2741 transitions. [2021-02-19 17:15:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:15:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:50,653 INFO L225 Difference]: With dead ends: 1076 [2021-02-19 17:15:50,653 INFO L226 Difference]: Without dead ends: 1034 [2021-02-19 17:15:50,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-02-19 17:15:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 994. [2021-02-19 17:15:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 2.5891238670694863) internal successors, (2571), 993 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2571 transitions. [2021-02-19 17:15:50,675 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2571 transitions. Word has length 23 [2021-02-19 17:15:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:50,676 INFO L480 AbstractCegarLoop]: Abstraction has 994 states and 2571 transitions. [2021-02-19 17:15:50,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2571 transitions. [2021-02-19 17:15:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:50,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:50,677 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:50,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-02-19 17:15:50,677 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash -670007296, now seen corresponding path program 4 times [2021-02-19 17:15:50,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:50,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675274803] [2021-02-19 17:15:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:15:50,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675274803] [2021-02-19 17:15:50,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973374325] [2021-02-19 17:15:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:50,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:15:50,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:50,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 17:15:50,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812150598] [2021-02-19 17:15:50,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:50,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:50,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:50,784 INFO L87 Difference]: Start difference. First operand 994 states and 2571 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:50,852 INFO L93 Difference]: Finished difference Result 1125 states and 2825 transitions. [2021-02-19 17:15:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:15:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:50,854 INFO L225 Difference]: With dead ends: 1125 [2021-02-19 17:15:50,855 INFO L226 Difference]: Without dead ends: 1119 [2021-02-19 17:15:50,855 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:50,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-02-19 17:15:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1007. [2021-02-19 17:15:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.5874751491053676) internal successors, (2603), 1006 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2603 transitions. [2021-02-19 17:15:50,869 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2603 transitions. Word has length 23 [2021-02-19 17:15:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:50,869 INFO L480 AbstractCegarLoop]: Abstraction has 1007 states and 2603 transitions. [2021-02-19 17:15:50,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2603 transitions. [2021-02-19 17:15:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:50,871 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:50,871 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:51,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:51,084 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash -819089290, now seen corresponding path program 16 times [2021-02-19 17:15:51,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:51,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500126711] [2021-02-19 17:15:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:51,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500126711] [2021-02-19 17:15:51,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798484422] [2021-02-19 17:15:51,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:51,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:51,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:51,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:15:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:51,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:51,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 17:15:51,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039060575] [2021-02-19 17:15:51,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:15:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:15:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:51,159 INFO L87 Difference]: Start difference. First operand 1007 states and 2603 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:51,210 INFO L93 Difference]: Finished difference Result 1438 states and 3685 transitions. [2021-02-19 17:15:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:15:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:51,213 INFO L225 Difference]: With dead ends: 1438 [2021-02-19 17:15:51,213 INFO L226 Difference]: Without dead ends: 1425 [2021-02-19 17:15:51,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-02-19 17:15:51,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1280. [2021-02-19 17:15:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 2.639562157935887) internal successors, (3376), 1279 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3376 transitions. [2021-02-19 17:15:51,230 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3376 transitions. Word has length 23 [2021-02-19 17:15:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:51,230 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 3376 transitions. [2021-02-19 17:15:51,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3376 transitions. [2021-02-19 17:15:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:51,232 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:51,232 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:51,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 17:15:51,438 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:51,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:51,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910038, now seen corresponding path program 5 times [2021-02-19 17:15:51,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:51,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009436609] [2021-02-19 17:15:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:51,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009436609] [2021-02-19 17:15:51,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611963783] [2021-02-19 17:15:51,471 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 [2021-02-19 17:15:51,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:15:51,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:51,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:15:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:51,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:51,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 17:15:51,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671885391] [2021-02-19 17:15:51,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:15:51,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:51,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:15:51,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:15:51,545 INFO L87 Difference]: Start difference. First operand 1280 states and 3376 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:51,836 INFO L93 Difference]: Finished difference Result 1624 states and 4068 transitions. [2021-02-19 17:15:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:15:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:15:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:51,839 INFO L225 Difference]: With dead ends: 1624 [2021-02-19 17:15:51,839 INFO L226 Difference]: Without dead ends: 1612 [2021-02-19 17:15:51,840 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:15:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-02-19 17:15:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1217. [2021-02-19 17:15:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.632401315789474) internal successors, (3201), 1216 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3201 transitions. [2021-02-19 17:15:51,856 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3201 transitions. Word has length 23 [2021-02-19 17:15:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:51,856 INFO L480 AbstractCegarLoop]: Abstraction has 1217 states and 3201 transitions. [2021-02-19 17:15:51,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3201 transitions. [2021-02-19 17:15:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:15:51,858 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:51,858 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:52,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:52,060 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050922, now seen corresponding path program 4 times [2021-02-19 17:15:52,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:52,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945378826] [2021-02-19 17:15:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:52,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945378826] [2021-02-19 17:15:52,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547910535] [2021-02-19 17:15:52,098 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:52,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:52,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:52,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:52,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:52,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:15:52,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142466583] [2021-02-19 17:15:52,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:15:52,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:15:52,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:52,177 INFO L87 Difference]: Start difference. First operand 1217 states and 3201 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-02-19 17:15:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:52,259 INFO L93 Difference]: Finished difference Result 1486 states and 3771 transitions. [2021-02-19 17:15:52,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 23 [2021-02-19 17:15:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:52,262 INFO L225 Difference]: With dead ends: 1486 [2021-02-19 17:15:52,262 INFO L226 Difference]: Without dead ends: 1417 [2021-02-19 17:15:52,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-02-19 17:15:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1004. [2021-02-19 17:15:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 2.5912263210368893) internal successors, (2599), 1003 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 2599 transitions. [2021-02-19 17:15:52,277 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 2599 transitions. Word has length 23 [2021-02-19 17:15:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:52,277 INFO L480 AbstractCegarLoop]: Abstraction has 1004 states and 2599 transitions. [2021-02-19 17:15:52,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-02-19 17:15:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 2599 transitions. [2021-02-19 17:15:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:52,279 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:52,279 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:52,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 17:15:52,494 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794916, now seen corresponding path program 17 times [2021-02-19 17:15:52,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:52,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407800368] [2021-02-19 17:15:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:52,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407800368] [2021-02-19 17:15:52,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171087604] [2021-02-19 17:15:52,538 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 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 [2021-02-19 17:15:52,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:15:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:52,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:52,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:52,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-02-19 17:15:52,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146651382] [2021-02-19 17:15:52,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:52,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:52,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:52,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:52,627 INFO L87 Difference]: Start difference. First operand 1004 states and 2599 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:52,861 INFO L93 Difference]: Finished difference Result 1533 states and 3634 transitions. [2021-02-19 17:15:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:15:52,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:52,864 INFO L225 Difference]: With dead ends: 1533 [2021-02-19 17:15:52,864 INFO L226 Difference]: Without dead ends: 1533 [2021-02-19 17:15:52,865 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:15:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-02-19 17:15:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1062. [2021-02-19 17:15:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 2.5721017907634307) internal successors, (2729), 1061 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 2729 transitions. [2021-02-19 17:15:52,878 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 2729 transitions. Word has length 26 [2021-02-19 17:15:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:52,878 INFO L480 AbstractCegarLoop]: Abstraction has 1062 states and 2729 transitions. [2021-02-19 17:15:52,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 2729 transitions. [2021-02-19 17:15:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:52,880 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:52,880 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:53,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 17:15:53,094 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:53,094 INFO L82 PathProgramCache]: Analyzing trace with hash 761306999, now seen corresponding path program 18 times [2021-02-19 17:15:53,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:53,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993126593] [2021-02-19 17:15:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:53,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993126593] [2021-02-19 17:15:53,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908545889] [2021-02-19 17:15:53,133 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 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 [2021-02-19 17:15:53,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:15:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:53,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:53,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-02-19 17:15:53,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301987635] [2021-02-19 17:15:53,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:15:53,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:15:53,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:53,208 INFO L87 Difference]: Start difference. First operand 1062 states and 2729 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:53,302 INFO L93 Difference]: Finished difference Result 1730 states and 4153 transitions. [2021-02-19 17:15:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:53,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:53,312 INFO L225 Difference]: With dead ends: 1730 [2021-02-19 17:15:53,312 INFO L226 Difference]: Without dead ends: 1710 [2021-02-19 17:15:53,312 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:15:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-02-19 17:15:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1164. [2021-02-19 17:15:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 2.6061908856405847) internal successors, (3031), 1163 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3031 transitions. [2021-02-19 17:15:53,330 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3031 transitions. Word has length 26 [2021-02-19 17:15:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:53,330 INFO L480 AbstractCegarLoop]: Abstraction has 1164 states and 3031 transitions. [2021-02-19 17:15:53,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3031 transitions. [2021-02-19 17:15:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:53,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:53,332 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:53,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-02-19 17:15:53,546 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:53,546 INFO L82 PathProgramCache]: Analyzing trace with hash -195885641, now seen corresponding path program 19 times [2021-02-19 17:15:53,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:53,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465992177] [2021-02-19 17:15:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:53,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465992177] [2021-02-19 17:15:53,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186256765] [2021-02-19 17:15:53,577 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 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 [2021-02-19 17:15:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:53,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:53,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:53,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:53,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-02-19 17:15:53,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621578330] [2021-02-19 17:15:53,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:53,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:53,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:53,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:53,636 INFO L87 Difference]: Start difference. First operand 1164 states and 3031 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:53,728 INFO L93 Difference]: Finished difference Result 1601 states and 3880 transitions. [2021-02-19 17:15:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:15:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:53,730 INFO L225 Difference]: With dead ends: 1601 [2021-02-19 17:15:53,730 INFO L226 Difference]: Without dead ends: 1601 [2021-02-19 17:15:53,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:15:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-02-19 17:15:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1098. [2021-02-19 17:15:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.5660893345487694) internal successors, (2815), 1097 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2815 transitions. [2021-02-19 17:15:53,744 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2815 transitions. Word has length 26 [2021-02-19 17:15:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:53,744 INFO L480 AbstractCegarLoop]: Abstraction has 1098 states and 2815 transitions. [2021-02-19 17:15:53,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2815 transitions. [2021-02-19 17:15:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:53,745 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:53,745 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:53,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:53,960 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702088, now seen corresponding path program 20 times [2021-02-19 17:15:53,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:53,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091889230] [2021-02-19 17:15:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:53,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091889230] [2021-02-19 17:15:53,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254231851] [2021-02-19 17:15:53,992 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:54,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:54,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:54,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:54,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 17:15:54,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019331364] [2021-02-19 17:15:54,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:54,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:54,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:54,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:54,051 INFO L87 Difference]: Start difference. First operand 1098 states and 2815 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-02-19 17:15:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:54,123 INFO L93 Difference]: Finished difference Result 1250 states and 3100 transitions. [2021-02-19 17:15:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 [2021-02-19 17:15:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:54,124 INFO L225 Difference]: With dead ends: 1250 [2021-02-19 17:15:54,124 INFO L226 Difference]: Without dead ends: 1247 [2021-02-19 17:15:54,124 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-02-19 17:15:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1098. [2021-02-19 17:15:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 2.5651777575205106) internal successors, (2814), 1097 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2814 transitions. [2021-02-19 17:15:54,138 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2814 transitions. Word has length 26 [2021-02-19 17:15:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:54,138 INFO L480 AbstractCegarLoop]: Abstraction has 1098 states and 2814 transitions. [2021-02-19 17:15:54,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-02-19 17:15:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2814 transitions. [2021-02-19 17:15:54,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:54,139 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:54,139 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:54,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 17:15:54,347 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998330, now seen corresponding path program 21 times [2021-02-19 17:15:54,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:54,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308578913] [2021-02-19 17:15:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:54,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308578913] [2021-02-19 17:15:54,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315359122] [2021-02-19 17:15:54,375 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 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 [2021-02-19 17:15:54,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:15:54,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:54,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:54,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:54,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:54,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 17:15:54,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457680274] [2021-02-19 17:15:54,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:54,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:54,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:54,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:54,431 INFO L87 Difference]: Start difference. First operand 1098 states and 2814 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:54,527 INFO L93 Difference]: Finished difference Result 1540 states and 3748 transitions. [2021-02-19 17:15:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:54,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:54,530 INFO L225 Difference]: With dead ends: 1540 [2021-02-19 17:15:54,530 INFO L226 Difference]: Without dead ends: 1540 [2021-02-19 17:15:54,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:54,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-02-19 17:15:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1167. [2021-02-19 17:15:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.5874785591766725) internal successors, (3017), 1166 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 3017 transitions. [2021-02-19 17:15:54,545 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 3017 transitions. Word has length 26 [2021-02-19 17:15:54,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:54,545 INFO L480 AbstractCegarLoop]: Abstraction has 1167 states and 3017 transitions. [2021-02-19 17:15:54,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 3017 transitions. [2021-02-19 17:15:54,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:54,546 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:54,546 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:54,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:54,761 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:54,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374535, now seen corresponding path program 22 times [2021-02-19 17:15:54,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:54,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544791462] [2021-02-19 17:15:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:54,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544791462] [2021-02-19 17:15:54,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476257916] [2021-02-19 17:15:54,795 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 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 [2021-02-19 17:15:54,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:54,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:54,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:54,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:54,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:54,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-02-19 17:15:54,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614068770] [2021-02-19 17:15:54,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:54,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:54,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:54,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:54,857 INFO L87 Difference]: Start difference. First operand 1167 states and 3017 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-02-19 17:15:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:54,941 INFO L93 Difference]: Finished difference Result 1574 states and 3878 transitions. [2021-02-19 17:15:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:15:54,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 26 [2021-02-19 17:15:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:54,944 INFO L225 Difference]: With dead ends: 1574 [2021-02-19 17:15:54,944 INFO L226 Difference]: Without dead ends: 1572 [2021-02-19 17:15:54,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:54,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-02-19 17:15:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1231. [2021-02-19 17:15:54,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.608130081300813) internal successors, (3208), 1230 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3208 transitions. [2021-02-19 17:15:54,959 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3208 transitions. Word has length 26 [2021-02-19 17:15:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:54,959 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 3208 transitions. [2021-02-19 17:15:54,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-02-19 17:15:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3208 transitions. [2021-02-19 17:15:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:54,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:54,960 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:55,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 17:15:55,174 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712351, now seen corresponding path program 23 times [2021-02-19 17:15:55,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:55,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138522588] [2021-02-19 17:15:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:15:55,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138522588] [2021-02-19 17:15:55,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904453842] [2021-02-19 17:15:55,212 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:55,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:15:55,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:55,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:55,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:55,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-02-19 17:15:55,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840851971] [2021-02-19 17:15:55,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:15:55,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:55,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:15:55,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:55,279 INFO L87 Difference]: Start difference. First operand 1231 states and 3208 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:55,390 INFO L93 Difference]: Finished difference Result 1695 states and 4127 transitions. [2021-02-19 17:15:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:15:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:55,400 INFO L225 Difference]: With dead ends: 1695 [2021-02-19 17:15:55,400 INFO L226 Difference]: Without dead ends: 1695 [2021-02-19 17:15:55,418 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:15:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-02-19 17:15:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1239. [2021-02-19 17:15:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.6066235864297256) internal successors, (3227), 1238 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3227 transitions. [2021-02-19 17:15:55,433 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3227 transitions. Word has length 26 [2021-02-19 17:15:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:55,433 INFO L480 AbstractCegarLoop]: Abstraction has 1239 states and 3227 transitions. [2021-02-19 17:15:55,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3227 transitions. [2021-02-19 17:15:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:55,434 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:55,434 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:55,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 17:15:55,649 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895904, now seen corresponding path program 24 times [2021-02-19 17:15:55,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:55,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519483576] [2021-02-19 17:15:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:15:55,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519483576] [2021-02-19 17:15:55,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620394838] [2021-02-19 17:15:55,673 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 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 [2021-02-19 17:15:55,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:15:55,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:55,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:55,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:15:55,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:55,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 17:15:55,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249317738] [2021-02-19 17:15:55,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:55,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:55,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:55,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:55,739 INFO L87 Difference]: Start difference. First operand 1239 states and 3227 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:55,807 INFO L93 Difference]: Finished difference Result 1555 states and 3822 transitions. [2021-02-19 17:15:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:55,809 INFO L225 Difference]: With dead ends: 1555 [2021-02-19 17:15:55,809 INFO L226 Difference]: Without dead ends: 1549 [2021-02-19 17:15:55,809 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-02-19 17:15:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1177. [2021-02-19 17:15:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.578231292517007) internal successors, (3032), 1176 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3032 transitions. [2021-02-19 17:15:55,823 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3032 transitions. Word has length 26 [2021-02-19 17:15:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:55,823 INFO L480 AbstractCegarLoop]: Abstraction has 1177 states and 3032 transitions. [2021-02-19 17:15:55,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3032 transitions. [2021-02-19 17:15:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:55,824 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:55,824 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:56,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:56,030 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash 346139895, now seen corresponding path program 25 times [2021-02-19 17:15:56,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:56,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328609528] [2021-02-19 17:15:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328609528] [2021-02-19 17:15:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095781055] [2021-02-19 17:15:56,065 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:56,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:56,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:56,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:56,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-02-19 17:15:56,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857260145] [2021-02-19 17:15:56,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:15:56,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:15:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:56,125 INFO L87 Difference]: Start difference. First operand 1177 states and 3032 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-02-19 17:15:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:56,245 INFO L93 Difference]: Finished difference Result 1568 states and 3774 transitions. [2021-02-19 17:15:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:15:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 26 [2021-02-19 17:15:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:56,247 INFO L225 Difference]: With dead ends: 1568 [2021-02-19 17:15:56,247 INFO L226 Difference]: Without dead ends: 1568 [2021-02-19 17:15:56,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:15:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-02-19 17:15:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1057. [2021-02-19 17:15:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.5426136363636362) internal successors, (2685), 1056 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2685 transitions. [2021-02-19 17:15:56,259 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2685 transitions. Word has length 26 [2021-02-19 17:15:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:56,259 INFO L480 AbstractCegarLoop]: Abstraction has 1057 states and 2685 transitions. [2021-02-19 17:15:56,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-02-19 17:15:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2685 transitions. [2021-02-19 17:15:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:56,261 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:56,261 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:56,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-02-19 17:15:56,465 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958470, now seen corresponding path program 26 times [2021-02-19 17:15:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:56,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104927655] [2021-02-19 17:15:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:56,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104927655] [2021-02-19 17:15:56,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853542527] [2021-02-19 17:15:56,497 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:56,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:56,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:56,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:15:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:56,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:56,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:15:56,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313371911] [2021-02-19 17:15:56,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:15:56,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:15:56,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:56,569 INFO L87 Difference]: Start difference. First operand 1057 states and 2685 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:56,677 INFO L93 Difference]: Finished difference Result 1294 states and 3138 transitions. [2021-02-19 17:15:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:15:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:56,678 INFO L225 Difference]: With dead ends: 1294 [2021-02-19 17:15:56,678 INFO L226 Difference]: Without dead ends: 1282 [2021-02-19 17:15:56,678 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:15:56,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-02-19 17:15:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1066. [2021-02-19 17:15:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 2.5380281690140847) internal successors, (2703), 1065 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 2703 transitions. [2021-02-19 17:15:56,689 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 2703 transitions. Word has length 26 [2021-02-19 17:15:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:56,689 INFO L480 AbstractCegarLoop]: Abstraction has 1066 states and 2703 transitions. [2021-02-19 17:15:56,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 2703 transitions. [2021-02-19 17:15:56,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:56,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:56,690 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:56,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:56,905 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613750, now seen corresponding path program 27 times [2021-02-19 17:15:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:56,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490884147] [2021-02-19 17:15:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:56,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490884147] [2021-02-19 17:15:56,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350242379] [2021-02-19 17:15:56,939 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:56,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:56,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:56,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:15:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:15:57,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:57,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2021-02-19 17:15:57,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610325944] [2021-02-19 17:15:57,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:15:57,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:15:57,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:57,092 INFO L87 Difference]: Start difference. First operand 1066 states and 2703 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:57,610 INFO L93 Difference]: Finished difference Result 1521 states and 3549 transitions. [2021-02-19 17:15:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:15:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:15:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:57,612 INFO L225 Difference]: With dead ends: 1521 [2021-02-19 17:15:57,612 INFO L226 Difference]: Without dead ends: 1507 [2021-02-19 17:15:57,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:15:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-02-19 17:15:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 865. [2021-02-19 17:15:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.4583333333333335) internal successors, (2124), 864 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2124 transitions. [2021-02-19 17:15:57,644 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2124 transitions. Word has length 26 [2021-02-19 17:15:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:57,645 INFO L480 AbstractCegarLoop]: Abstraction has 865 states and 2124 transitions. [2021-02-19 17:15:57,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2124 transitions. [2021-02-19 17:15:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:57,646 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:57,646 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:57,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 17:15:57,850 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715678, now seen corresponding path program 28 times [2021-02-19 17:15:57,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:57,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850647959] [2021-02-19 17:15:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:57,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850647959] [2021-02-19 17:15:57,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959782565] [2021-02-19 17:15:57,877 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:57,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:57,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:57,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:57,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:57,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 17:15:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75093732] [2021-02-19 17:15:57,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:57,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:57,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:57,953 INFO L87 Difference]: Start difference. First operand 865 states and 2124 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-02-19 17:15:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:58,033 INFO L93 Difference]: Finished difference Result 1241 states and 2905 transitions. [2021-02-19 17:15:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:58,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 [2021-02-19 17:15:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:58,035 INFO L225 Difference]: With dead ends: 1241 [2021-02-19 17:15:58,035 INFO L226 Difference]: Without dead ends: 1241 [2021-02-19 17:15:58,035 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-02-19 17:15:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 893. [2021-02-19 17:15:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.4809417040358746) internal successors, (2213), 892 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2213 transitions. [2021-02-19 17:15:58,044 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2213 transitions. Word has length 26 [2021-02-19 17:15:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:58,044 INFO L480 AbstractCegarLoop]: Abstraction has 893 states and 2213 transitions. [2021-02-19 17:15:58,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-02-19 17:15:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2213 transitions. [2021-02-19 17:15:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:58,045 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:58,045 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:58,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-02-19 17:15:58,245 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:58,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:58,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1200084165, now seen corresponding path program 29 times [2021-02-19 17:15:58,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:58,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340496518] [2021-02-19 17:15:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:58,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340496518] [2021-02-19 17:15:58,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084315352] [2021-02-19 17:15:58,273 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:58,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:15:58,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:58,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:58,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:58,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:58,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:15:58,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374534019] [2021-02-19 17:15:58,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:15:58,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:58,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:15:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:58,338 INFO L87 Difference]: Start difference. First operand 893 states and 2213 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:58,470 INFO L93 Difference]: Finished difference Result 1410 states and 3303 transitions. [2021-02-19 17:15:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:15:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:58,472 INFO L225 Difference]: With dead ends: 1410 [2021-02-19 17:15:58,472 INFO L226 Difference]: Without dead ends: 1410 [2021-02-19 17:15:58,472 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:15:58,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-02-19 17:15:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 977. [2021-02-19 17:15:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.507172131147541) internal successors, (2447), 976 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2447 transitions. [2021-02-19 17:15:58,483 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2447 transitions. Word has length 26 [2021-02-19 17:15:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:58,483 INFO L480 AbstractCegarLoop]: Abstraction has 977 states and 2447 transitions. [2021-02-19 17:15:58,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2447 transitions. [2021-02-19 17:15:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:58,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:58,485 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:58,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:58,698 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash 127178556, now seen corresponding path program 30 times [2021-02-19 17:15:58,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:58,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583102388] [2021-02-19 17:15:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:58,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583102388] [2021-02-19 17:15:58,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609090460] [2021-02-19 17:15:58,725 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:58,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:15:58,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:58,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:58,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:58,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:58,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 17:15:58,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114628721] [2021-02-19 17:15:58,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:58,781 INFO L87 Difference]: Start difference. First operand 977 states and 2447 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-02-19 17:15:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:58,832 INFO L93 Difference]: Finished difference Result 1318 states and 3120 transitions. [2021-02-19 17:15:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:15:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 [2021-02-19 17:15:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:58,833 INFO L225 Difference]: With dead ends: 1318 [2021-02-19 17:15:58,834 INFO L226 Difference]: Without dead ends: 1315 [2021-02-19 17:15:58,834 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-02-19 17:15:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 977. [2021-02-19 17:15:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.5061475409836067) internal successors, (2446), 976 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2446 transitions. [2021-02-19 17:15:58,843 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2446 transitions. Word has length 26 [2021-02-19 17:15:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:58,843 INFO L480 AbstractCegarLoop]: Abstraction has 977 states and 2446 transitions. [2021-02-19 17:15:58,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-02-19 17:15:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2446 transitions. [2021-02-19 17:15:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:58,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:58,844 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:59,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,045 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1457310675, now seen corresponding path program 31 times [2021-02-19 17:15:59,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:59,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967385385] [2021-02-19 17:15:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967385385] [2021-02-19 17:15:59,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929103268] [2021-02-19 17:15:59,076 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:59,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:59,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:59,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-02-19 17:15:59,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759116244] [2021-02-19 17:15:59,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:15:59,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:15:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:59,151 INFO L87 Difference]: Start difference. First operand 977 states and 2446 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:59,284 INFO L93 Difference]: Finished difference Result 1449 states and 3401 transitions. [2021-02-19 17:15:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:15:59,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:15:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:59,286 INFO L225 Difference]: With dead ends: 1449 [2021-02-19 17:15:59,286 INFO L226 Difference]: Without dead ends: 1449 [2021-02-19 17:15:59,287 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:59,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-02-19 17:15:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1002. [2021-02-19 17:15:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 2.5134865134865136) internal successors, (2516), 1001 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2516 transitions. [2021-02-19 17:15:59,300 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2516 transitions. Word has length 26 [2021-02-19 17:15:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:59,300 INFO L480 AbstractCegarLoop]: Abstraction has 1002 states and 2516 transitions. [2021-02-19 17:15:59,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2516 transitions. [2021-02-19 17:15:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:59,301 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:59,301 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:59,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,514 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:59,514 INFO L82 PathProgramCache]: Analyzing trace with hash 334241122, now seen corresponding path program 32 times [2021-02-19 17:15:59,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:59,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696531792] [2021-02-19 17:15:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:59,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696531792] [2021-02-19 17:15:59,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704042067] [2021-02-19 17:15:59,548 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:59,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:59,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:59,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:59,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 17:15:59,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666505735] [2021-02-19 17:15:59,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:59,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:59,609 INFO L87 Difference]: Start difference. First operand 1002 states and 2516 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-02-19 17:15:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:59,674 INFO L93 Difference]: Finished difference Result 1406 states and 3307 transitions. [2021-02-19 17:15:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 [2021-02-19 17:15:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:59,676 INFO L225 Difference]: With dead ends: 1406 [2021-02-19 17:15:59,676 INFO L226 Difference]: Without dead ends: 1394 [2021-02-19 17:15:59,676 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-02-19 17:15:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1002. [2021-02-19 17:15:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 2.5104895104895104) internal successors, (2513), 1001 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2513 transitions. [2021-02-19 17:15:59,686 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2513 transitions. Word has length 26 [2021-02-19 17:15:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:59,686 INFO L480 AbstractCegarLoop]: Abstraction has 1002 states and 2513 transitions. [2021-02-19 17:15:59,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-02-19 17:15:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2513 transitions. [2021-02-19 17:15:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:59,687 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:59,687 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:59,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-02-19 17:15:59,887 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:59,888 INFO L82 PathProgramCache]: Analyzing trace with hash -232684489, now seen corresponding path program 33 times [2021-02-19 17:15:59,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:59,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429484665] [2021-02-19 17:15:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:59,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429484665] [2021-02-19 17:15:59,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501040737] [2021-02-19 17:15:59,934 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:59,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:59,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:00,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:00,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-02-19 17:16:00,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240327800] [2021-02-19 17:16:00,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:00,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:00,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:00,090 INFO L87 Difference]: Start difference. First operand 1002 states and 2513 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2021-02-19 17:16:00,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:00,679 INFO L93 Difference]: Finished difference Result 1583 states and 3654 transitions. [2021-02-19 17:16:00,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:16:00,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 26 [2021-02-19 17:16:00,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:00,680 INFO L225 Difference]: With dead ends: 1583 [2021-02-19 17:16:00,680 INFO L226 Difference]: Without dead ends: 1564 [2021-02-19 17:16:00,681 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=961, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:16:00,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-02-19 17:16:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 947. [2021-02-19 17:16:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.463002114164905) internal successors, (2330), 946 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2330 transitions. [2021-02-19 17:16:00,690 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2330 transitions. Word has length 26 [2021-02-19 17:16:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:00,690 INFO L480 AbstractCegarLoop]: Abstraction has 947 states and 2330 transitions. [2021-02-19 17:16:00,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2021-02-19 17:16:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2330 transitions. [2021-02-19 17:16:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:16:00,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:00,691 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:00,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:00,906 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181372, now seen corresponding path program 34 times [2021-02-19 17:16:00,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:00,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521070129] [2021-02-19 17:16:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:00,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521070129] [2021-02-19 17:16:00,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173432975] [2021-02-19 17:16:00,945 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:00,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:00,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:00,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:16:00,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:01,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:01,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:16:01,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933733460] [2021-02-19 17:16:01,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:01,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:01,000 INFO L87 Difference]: Start difference. First operand 947 states and 2330 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:01,089 INFO L93 Difference]: Finished difference Result 1283 states and 2992 transitions. [2021-02-19 17:16:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:01,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 17:16:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:01,090 INFO L225 Difference]: With dead ends: 1283 [2021-02-19 17:16:01,090 INFO L226 Difference]: Without dead ends: 1260 [2021-02-19 17:16:01,090 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-02-19 17:16:01,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 980. [2021-02-19 17:16:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.4443309499489274) internal successors, (2393), 979 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2393 transitions. [2021-02-19 17:16:01,100 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2393 transitions. Word has length 26 [2021-02-19 17:16:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:01,100 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 2393 transitions. [2021-02-19 17:16:01,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,100 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2393 transitions. [2021-02-19 17:16:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:01,101 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:01,101 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:01,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:01,314 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:01,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037753, now seen corresponding path program 5 times [2021-02-19 17:16:01,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:01,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803165092] [2021-02-19 17:16:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:01,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803165092] [2021-02-19 17:16:01,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376120699] [2021-02-19 17:16:01,362 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:01,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:16:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:01,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:01,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:01,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474819572] [2021-02-19 17:16:01,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:01,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:01,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:01,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:01,438 INFO L87 Difference]: Start difference. First operand 980 states and 2393 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:01,633 INFO L93 Difference]: Finished difference Result 1505 states and 3422 transitions. [2021-02-19 17:16:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:01,635 INFO L225 Difference]: With dead ends: 1505 [2021-02-19 17:16:01,635 INFO L226 Difference]: Without dead ends: 1447 [2021-02-19 17:16:01,635 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-02-19 17:16:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 927. [2021-02-19 17:16:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.4211663066954645) internal successors, (2242), 926 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2242 transitions. [2021-02-19 17:16:01,644 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2242 transitions. Word has length 29 [2021-02-19 17:16:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:01,644 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 2242 transitions. [2021-02-19 17:16:01,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2242 transitions. [2021-02-19 17:16:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:01,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:01,645 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:01,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:01,846 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash 328852871, now seen corresponding path program 6 times [2021-02-19 17:16:01,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:01,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227403979] [2021-02-19 17:16:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:01,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227403979] [2021-02-19 17:16:01,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338593739] [2021-02-19 17:16:01,899 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:01,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:01,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:01,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:16:01,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:02,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:16:02,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:16:02,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:16:02,025 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-02-19 17:16:02,025 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:16:02,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:16:02,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-02-19 17:16:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:02,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:02,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:16:02,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842107370] [2021-02-19 17:16:02,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:02,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:02,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:02,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:02,032 INFO L87 Difference]: Start difference. First operand 927 states and 2242 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:02,213 INFO L93 Difference]: Finished difference Result 1021 states and 2382 transitions. [2021-02-19 17:16:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:02,214 INFO L225 Difference]: With dead ends: 1021 [2021-02-19 17:16:02,214 INFO L226 Difference]: Without dead ends: 969 [2021-02-19 17:16:02,214 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-02-19 17:16:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 878. [2021-02-19 17:16:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.418472063854048) internal successors, (2121), 877 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2121 transitions. [2021-02-19 17:16:02,224 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2121 transitions. Word has length 29 [2021-02-19 17:16:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:02,224 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 2121 transitions. [2021-02-19 17:16:02,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2121 transitions. [2021-02-19 17:16:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:02,225 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:02,225 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:02,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:02,426 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:02,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:02,426 INFO L82 PathProgramCache]: Analyzing trace with hash -114875897, now seen corresponding path program 7 times [2021-02-19 17:16:02,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:02,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768934385] [2021-02-19 17:16:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:02,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768934385] [2021-02-19 17:16:02,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192477748] [2021-02-19 17:16:02,472 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:02,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:02,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:02,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333752954] [2021-02-19 17:16:02,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:02,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:02,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:02,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:02,534 INFO L87 Difference]: Start difference. First operand 878 states and 2121 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-02-19 17:16:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:02,619 INFO L93 Difference]: Finished difference Result 1004 states and 2363 transitions. [2021-02-19 17:16:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:02,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 29 [2021-02-19 17:16:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:02,620 INFO L225 Difference]: With dead ends: 1004 [2021-02-19 17:16:02,620 INFO L226 Difference]: Without dead ends: 1004 [2021-02-19 17:16:02,620 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-02-19 17:16:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 884. [2021-02-19 17:16:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.420158550396376) internal successors, (2137), 883 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2137 transitions. [2021-02-19 17:16:02,628 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2137 transitions. Word has length 29 [2021-02-19 17:16:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:02,628 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2137 transitions. [2021-02-19 17:16:02,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-02-19 17:16:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2137 transitions. [2021-02-19 17:16:02,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:02,629 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:02,629 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:02,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-02-19 17:16:02,829 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:02,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:02,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1244519700, now seen corresponding path program 6 times [2021-02-19 17:16:02,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:02,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775629096] [2021-02-19 17:16:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:02,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775629096] [2021-02-19 17:16:02,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957948607] [2021-02-19 17:16:02,875 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:02,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:16:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:02,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:02,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-02-19 17:16:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534075453] [2021-02-19 17:16:02,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:02,946 INFO L87 Difference]: Start difference. First operand 884 states and 2137 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:03,063 INFO L93 Difference]: Finished difference Result 1254 states and 2896 transitions. [2021-02-19 17:16:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:03,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:03,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:03,064 INFO L225 Difference]: With dead ends: 1254 [2021-02-19 17:16:03,064 INFO L226 Difference]: Without dead ends: 1226 [2021-02-19 17:16:03,064 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:16:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-02-19 17:16:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 886. [2021-02-19 17:16:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.4112994350282486) internal successors, (2134), 885 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2134 transitions. [2021-02-19 17:16:03,073 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2134 transitions. Word has length 29 [2021-02-19 17:16:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:03,073 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 2134 transitions. [2021-02-19 17:16:03,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2134 transitions. [2021-02-19 17:16:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:03,074 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:03,074 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:03,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,287 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash 753499739, now seen corresponding path program 35 times [2021-02-19 17:16:03,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:03,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791631939] [2021-02-19 17:16:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:03,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791631939] [2021-02-19 17:16:03,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723510770] [2021-02-19 17:16:03,316 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:03,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:03,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:16:03,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:03,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:03,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 17:16:03,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617718734] [2021-02-19 17:16:03,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:16:03,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:03,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:16:03,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:16:03,391 INFO L87 Difference]: Start difference. First operand 886 states and 2134 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) [2021-02-19 17:16:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:03,466 INFO L93 Difference]: Finished difference Result 1454 states and 3465 transitions. [2021-02-19 17:16:03,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:16:03,466 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 29 [2021-02-19 17:16:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:03,467 INFO L225 Difference]: With dead ends: 1454 [2021-02-19 17:16:03,468 INFO L226 Difference]: Without dead ends: 1419 [2021-02-19 17:16:03,468 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:16:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-02-19 17:16:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1059. [2021-02-19 17:16:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 2.4706994328922494) internal successors, (2614), 1058 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 2614 transitions. [2021-02-19 17:16:03,477 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 2614 transitions. Word has length 29 [2021-02-19 17:16:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:03,477 INFO L480 AbstractCegarLoop]: Abstraction has 1059 states and 2614 transitions. [2021-02-19 17:16:03,477 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) [2021-02-19 17:16:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 2614 transitions. [2021-02-19 17:16:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:03,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:03,478 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:03,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 17:16:03,679 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:03,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556965, now seen corresponding path program 7 times [2021-02-19 17:16:03,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:03,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597935415] [2021-02-19 17:16:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:03,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597935415] [2021-02-19 17:16:03,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794260475] [2021-02-19 17:16:03,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:03,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:03,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:03,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738814104] [2021-02-19 17:16:03,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:03,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:03,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:03,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:03,787 INFO L87 Difference]: Start difference. First operand 1059 states and 2614 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:03,876 INFO L93 Difference]: Finished difference Result 1467 states and 3461 transitions. [2021-02-19 17:16:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:03,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:03,878 INFO L225 Difference]: With dead ends: 1467 [2021-02-19 17:16:03,878 INFO L226 Difference]: Without dead ends: 1448 [2021-02-19 17:16:03,878 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-02-19 17:16:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1122. [2021-02-19 17:16:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.463871543264942) internal successors, (2762), 1121 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) [2021-02-19 17:16:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2762 transitions. [2021-02-19 17:16:03,890 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2762 transitions. Word has length 29 [2021-02-19 17:16:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:03,890 INFO L480 AbstractCegarLoop]: Abstraction has 1122 states and 2762 transitions. [2021-02-19 17:16:03,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2762 transitions. [2021-02-19 17:16:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:03,891 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:03,891 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:04,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-02-19 17:16:04,102 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:04,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077339, now seen corresponding path program 8 times [2021-02-19 17:16:04,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:04,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344676819] [2021-02-19 17:16:04,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:04,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344676819] [2021-02-19 17:16:04,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777378191] [2021-02-19 17:16:04,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:04,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:04,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:04,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:04,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:16:04,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361940673] [2021-02-19 17:16:04,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:04,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:04,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:04,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:04,213 INFO L87 Difference]: Start difference. First operand 1122 states and 2762 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:04,341 INFO L93 Difference]: Finished difference Result 1377 states and 3234 transitions. [2021-02-19 17:16:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:04,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:04,343 INFO L225 Difference]: With dead ends: 1377 [2021-02-19 17:16:04,343 INFO L226 Difference]: Without dead ends: 1337 [2021-02-19 17:16:04,343 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-02-19 17:16:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1088. [2021-02-19 17:16:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 2.4590616375344987) internal successors, (2673), 1087 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 2673 transitions. [2021-02-19 17:16:04,352 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 2673 transitions. Word has length 29 [2021-02-19 17:16:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:04,352 INFO L480 AbstractCegarLoop]: Abstraction has 1088 states and 2673 transitions. [2021-02-19 17:16:04,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 2673 transitions. [2021-02-19 17:16:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:04,353 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:04,353 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:04,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 17:16:04,568 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613519, now seen corresponding path program 9 times [2021-02-19 17:16:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:04,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638791971] [2021-02-19 17:16:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:04,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638791971] [2021-02-19 17:16:04,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823256972] [2021-02-19 17:16:04,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:04,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:16:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:04,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:04,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:04,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609570998] [2021-02-19 17:16:04,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:04,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:04,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:04,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:04,675 INFO L87 Difference]: Start difference. First operand 1088 states and 2673 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-02-19 17:16:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:04,767 INFO L93 Difference]: Finished difference Result 1392 states and 3298 transitions. [2021-02-19 17:16:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:04,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 29 [2021-02-19 17:16:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:04,768 INFO L225 Difference]: With dead ends: 1392 [2021-02-19 17:16:04,768 INFO L226 Difference]: Without dead ends: 1365 [2021-02-19 17:16:04,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-02-19 17:16:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1100. [2021-02-19 17:16:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.4567788898999092) internal successors, (2700), 1099 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 2700 transitions. [2021-02-19 17:16:04,778 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 2700 transitions. Word has length 29 [2021-02-19 17:16:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:04,778 INFO L480 AbstractCegarLoop]: Abstraction has 1100 states and 2700 transitions. [2021-02-19 17:16:04,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2021-02-19 17:16:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 2700 transitions. [2021-02-19 17:16:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:04,780 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:04,780 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:04,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 17:16:04,994 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:04,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:04,994 INFO L82 PathProgramCache]: Analyzing trace with hash 70303815, now seen corresponding path program 10 times [2021-02-19 17:16:04,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:04,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599504364] [2021-02-19 17:16:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:05,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599504364] [2021-02-19 17:16:05,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229446815] [2021-02-19 17:16:05,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:05,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:05,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:16:05,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:05,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:16:05,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 17:16:05,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:16:05,111 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-02-19 17:16:05,112 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:16:05,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:16:05,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-02-19 17:16:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:05,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:05,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:16:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245884169] [2021-02-19 17:16:05,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:05,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:05,120 INFO L87 Difference]: Start difference. First operand 1100 states and 2700 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-02-19 17:16:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:05,305 INFO L93 Difference]: Finished difference Result 2432 states and 5712 transitions. [2021-02-19 17:16:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:05,305 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 29 [2021-02-19 17:16:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:05,307 INFO L225 Difference]: With dead ends: 2432 [2021-02-19 17:16:05,307 INFO L226 Difference]: Without dead ends: 2352 [2021-02-19 17:16:05,307 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-02-19 17:16:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1458. [2021-02-19 17:16:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.5277968428277284) internal successors, (3683), 1457 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 3683 transitions. [2021-02-19 17:16:05,323 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 3683 transitions. Word has length 29 [2021-02-19 17:16:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:05,323 INFO L480 AbstractCegarLoop]: Abstraction has 1458 states and 3683 transitions. [2021-02-19 17:16:05,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-02-19 17:16:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 3683 transitions. [2021-02-19 17:16:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:05,324 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:05,324 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:05,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 17:16:05,525 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:05,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021087, now seen corresponding path program 8 times [2021-02-19 17:16:05,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:05,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286162109] [2021-02-19 17:16:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:05,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286162109] [2021-02-19 17:16:05,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566533319] [2021-02-19 17:16:05,562 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:05,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:05,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:05,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:05,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:05,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:05,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286598852] [2021-02-19 17:16:05,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:05,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:05,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:05,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:05,626 INFO L87 Difference]: Start difference. First operand 1458 states and 3683 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:05,762 INFO L93 Difference]: Finished difference Result 1776 states and 4322 transitions. [2021-02-19 17:16:05,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:05,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:05,764 INFO L225 Difference]: With dead ends: 1776 [2021-02-19 17:16:05,764 INFO L226 Difference]: Without dead ends: 1772 [2021-02-19 17:16:05,764 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-02-19 17:16:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1474. [2021-02-19 17:16:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.5274949083503055) internal successors, (3723), 1473 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3723 transitions. [2021-02-19 17:16:05,778 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3723 transitions. Word has length 29 [2021-02-19 17:16:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:05,778 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 3723 transitions. [2021-02-19 17:16:05,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3723 transitions. [2021-02-19 17:16:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:05,779 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:05,779 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:05,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 17:16:05,994 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:05,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649825, now seen corresponding path program 11 times [2021-02-19 17:16:05,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:05,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172160089] [2021-02-19 17:16:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:06,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172160089] [2021-02-19 17:16:06,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263471803] [2021-02-19 17:16:06,041 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:06,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:16:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:06,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:06,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:16:06,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917215806] [2021-02-19 17:16:06,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:06,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:06,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:06,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:06,137 INFO L87 Difference]: Start difference. First operand 1474 states and 3723 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:06,254 INFO L93 Difference]: Finished difference Result 1626 states and 4001 transitions. [2021-02-19 17:16:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:06,256 INFO L225 Difference]: With dead ends: 1626 [2021-02-19 17:16:06,256 INFO L226 Difference]: Without dead ends: 1603 [2021-02-19 17:16:06,256 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:06,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-02-19 17:16:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1461. [2021-02-19 17:16:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 2.5287671232876714) internal successors, (3692), 1460 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 3692 transitions. [2021-02-19 17:16:06,270 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 3692 transitions. Word has length 29 [2021-02-19 17:16:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:06,270 INFO L480 AbstractCegarLoop]: Abstraction has 1461 states and 3692 transitions. [2021-02-19 17:16:06,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 3692 transitions. [2021-02-19 17:16:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:06,271 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:06,271 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:06,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 17:16:06,472 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:06,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279241, now seen corresponding path program 9 times [2021-02-19 17:16:06,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:06,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530847734] [2021-02-19 17:16:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:06,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530847734] [2021-02-19 17:16:06,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452460779] [2021-02-19 17:16:06,512 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:06,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:16:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:06,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:06,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:06,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492357833] [2021-02-19 17:16:06,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:06,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:06,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:06,571 INFO L87 Difference]: Start difference. First operand 1461 states and 3692 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-02-19 17:16:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:06,675 INFO L93 Difference]: Finished difference Result 1870 states and 4560 transitions. [2021-02-19 17:16:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:06,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 29 [2021-02-19 17:16:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:06,677 INFO L225 Difference]: With dead ends: 1870 [2021-02-19 17:16:06,677 INFO L226 Difference]: Without dead ends: 1860 [2021-02-19 17:16:06,678 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-02-19 17:16:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1540. [2021-02-19 17:16:06,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.521117608836907) internal successors, (3880), 1539 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:06,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 3880 transitions. [2021-02-19 17:16:06,692 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 3880 transitions. Word has length 29 [2021-02-19 17:16:06,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:06,692 INFO L480 AbstractCegarLoop]: Abstraction has 1540 states and 3880 transitions. [2021-02-19 17:16:06,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-02-19 17:16:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 3880 transitions. [2021-02-19 17:16:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:06,694 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:06,694 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:06,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:06,903 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:06,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:06,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355063, now seen corresponding path program 12 times [2021-02-19 17:16:06,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:06,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114630439] [2021-02-19 17:16:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:06,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114630439] [2021-02-19 17:16:06,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996629572] [2021-02-19 17:16:06,940 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:06,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:06,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:06,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:07,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:16:07,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:16:07,037 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 17:16:07,037 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:16:07,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:16:07,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-02-19 17:16:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:07,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:07,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-02-19 17:16:07,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351369787] [2021-02-19 17:16:07,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:16:07,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:07,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:16:07,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:07,044 INFO L87 Difference]: Start difference. First operand 1540 states and 3880 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:07,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:07,244 INFO L93 Difference]: Finished difference Result 1798 states and 4387 transitions. [2021-02-19 17:16:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:07,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:07,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:07,246 INFO L225 Difference]: With dead ends: 1798 [2021-02-19 17:16:07,246 INFO L226 Difference]: Without dead ends: 1705 [2021-02-19 17:16:07,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-02-19 17:16:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1545. [2021-02-19 17:16:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 2.5110103626943006) internal successors, (3877), 1544 states have internal predecessors, (3877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 3877 transitions. [2021-02-19 17:16:07,263 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 3877 transitions. Word has length 29 [2021-02-19 17:16:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:07,264 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 3877 transitions. [2021-02-19 17:16:07,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 3877 transitions. [2021-02-19 17:16:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:07,265 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:07,265 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:07,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 17:16:07,478 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash -109137375, now seen corresponding path program 13 times [2021-02-19 17:16:07,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:07,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588868890] [2021-02-19 17:16:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:07,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588868890] [2021-02-19 17:16:07,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382492470] [2021-02-19 17:16:07,520 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:07,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:07,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:07,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:07,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195552153] [2021-02-19 17:16:07,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:07,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:07,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:07,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:07,597 INFO L87 Difference]: Start difference. First operand 1545 states and 3877 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:07,743 INFO L93 Difference]: Finished difference Result 1767 states and 4304 transitions. [2021-02-19 17:16:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:07,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:07,744 INFO L225 Difference]: With dead ends: 1767 [2021-02-19 17:16:07,744 INFO L226 Difference]: Without dead ends: 1740 [2021-02-19 17:16:07,744 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-02-19 17:16:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1485. [2021-02-19 17:16:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.51078167115903) internal successors, (3726), 1484 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3726 transitions. [2021-02-19 17:16:07,757 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3726 transitions. Word has length 29 [2021-02-19 17:16:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:07,757 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 3726 transitions. [2021-02-19 17:16:07,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3726 transitions. [2021-02-19 17:16:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:07,758 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:07,758 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:07,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:07,960 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1583760347, now seen corresponding path program 36 times [2021-02-19 17:16:07,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:07,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127720835] [2021-02-19 17:16:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:07,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127720835] [2021-02-19 17:16:07,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831197613] [2021-02-19 17:16:07,998 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:08,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:16:08,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:08,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:16:08,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:08,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:08,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 17:16:08,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550025857] [2021-02-19 17:16:08,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:16:08,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:16:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:16:08,068 INFO L87 Difference]: Start difference. First operand 1485 states and 3726 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:08,152 INFO L93 Difference]: Finished difference Result 2087 states and 5110 transitions. [2021-02-19 17:16:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:16:08,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:08,154 INFO L225 Difference]: With dead ends: 2087 [2021-02-19 17:16:08,154 INFO L226 Difference]: Without dead ends: 2056 [2021-02-19 17:16:08,155 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:16:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2021-02-19 17:16:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 1745. [2021-02-19 17:16:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 2.5160550458715596) internal successors, (4388), 1744 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 4388 transitions. [2021-02-19 17:16:08,171 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 4388 transitions. Word has length 29 [2021-02-19 17:16:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:08,171 INFO L480 AbstractCegarLoop]: Abstraction has 1745 states and 4388 transitions. [2021-02-19 17:16:08,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 4388 transitions. [2021-02-19 17:16:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:08,173 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:08,173 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:08,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-02-19 17:16:08,387 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:08,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1113336215, now seen corresponding path program 14 times [2021-02-19 17:16:08,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:08,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723021058] [2021-02-19 17:16:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:08,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723021058] [2021-02-19 17:16:08,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244521145] [2021-02-19 17:16:08,416 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:08,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:08,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:16:08,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:08,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:08,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 13 [2021-02-19 17:16:08,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906917065] [2021-02-19 17:16:08,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:16:08,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:16:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:16:08,549 INFO L87 Difference]: Start difference. First operand 1745 states and 4388 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:09,081 INFO L93 Difference]: Finished difference Result 2937 states and 6908 transitions. [2021-02-19 17:16:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:16:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:09,084 INFO L225 Difference]: With dead ends: 2937 [2021-02-19 17:16:09,084 INFO L226 Difference]: Without dead ends: 2890 [2021-02-19 17:16:09,084 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:16:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-02-19 17:16:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1984. [2021-02-19 17:16:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 2.503277861825517) internal successors, (4964), 1983 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 4964 transitions. [2021-02-19 17:16:09,107 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 4964 transitions. Word has length 32 [2021-02-19 17:16:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:09,108 INFO L480 AbstractCegarLoop]: Abstraction has 1984 states and 4964 transitions. [2021-02-19 17:16:09,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:09,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 4964 transitions. [2021-02-19 17:16:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:09,110 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:09,110 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:09,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:09,310 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983083, now seen corresponding path program 37 times [2021-02-19 17:16:09,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:09,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408191709] [2021-02-19 17:16:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:09,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408191709] [2021-02-19 17:16:09,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761177654] [2021-02-19 17:16:09,342 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:09,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:16:09,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:09,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:09,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 17:16:09,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424117624] [2021-02-19 17:16:09,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:09,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:09,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:09,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:09,411 INFO L87 Difference]: Start difference. First operand 1984 states and 4964 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) 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) [2021-02-19 17:16:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:09,492 INFO L93 Difference]: Finished difference Result 2223 states and 5432 transitions. [2021-02-19 17:16:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:16:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) 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 [2021-02-19 17:16:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:09,494 INFO L225 Difference]: With dead ends: 2223 [2021-02-19 17:16:09,494 INFO L226 Difference]: Without dead ends: 2217 [2021-02-19 17:16:09,494 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-02-19 17:16:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1967. [2021-02-19 17:16:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 2.496439471007121) internal successors, (4908), 1966 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 4908 transitions. [2021-02-19 17:16:09,510 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 4908 transitions. Word has length 32 [2021-02-19 17:16:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:09,510 INFO L480 AbstractCegarLoop]: Abstraction has 1967 states and 4908 transitions. [2021-02-19 17:16:09,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) 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) [2021-02-19 17:16:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 4908 transitions. [2021-02-19 17:16:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:09,512 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:09,512 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:09,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:09,712 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:09,713 INFO L82 PathProgramCache]: Analyzing trace with hash 727682065, now seen corresponding path program 38 times [2021-02-19 17:16:09,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:09,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866129228] [2021-02-19 17:16:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:09,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866129228] [2021-02-19 17:16:09,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179139623] [2021-02-19 17:16:09,743 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:09,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:09,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:16:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:09,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:09,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 17:16:09,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909736970] [2021-02-19 17:16:09,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:09,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:09,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:09,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:09,804 INFO L87 Difference]: Start difference. First operand 1967 states and 4908 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:09,907 INFO L93 Difference]: Finished difference Result 2575 states and 6130 transitions. [2021-02-19 17:16:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:09,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:09,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:09,910 INFO L225 Difference]: With dead ends: 2575 [2021-02-19 17:16:09,910 INFO L226 Difference]: Without dead ends: 2545 [2021-02-19 17:16:09,910 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-02-19 17:16:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2060. [2021-02-19 17:16:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.5046138902379798) internal successors, (5157), 2059 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5157 transitions. [2021-02-19 17:16:09,951 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5157 transitions. Word has length 32 [2021-02-19 17:16:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:09,951 INFO L480 AbstractCegarLoop]: Abstraction has 2060 states and 5157 transitions. [2021-02-19 17:16:09,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5157 transitions. [2021-02-19 17:16:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:09,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:09,956 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:10,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 17:16:10,164 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash 934744631, now seen corresponding path program 39 times [2021-02-19 17:16:10,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:10,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897633919] [2021-02-19 17:16:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897633919] [2021-02-19 17:16:10,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253918121] [2021-02-19 17:16:10,200 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:10,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:10,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:16:10,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-02-19 17:16:10,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:10,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-02-19 17:16:10,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209172331] [2021-02-19 17:16:10,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:16:10,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:10,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:16:10,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:10,354 INFO L87 Difference]: Start difference. First operand 2060 states and 5157 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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) [2021-02-19 17:16:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:10,894 INFO L93 Difference]: Finished difference Result 2973 states and 6903 transitions. [2021-02-19 17:16:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:16:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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 [2021-02-19 17:16:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:10,898 INFO L225 Difference]: With dead ends: 2973 [2021-02-19 17:16:10,898 INFO L226 Difference]: Without dead ends: 2903 [2021-02-19 17:16:10,898 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:16:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-02-19 17:16:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2090. [2021-02-19 17:16:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 2.47486835806606) internal successors, (5170), 2089 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 5170 transitions. [2021-02-19 17:16:10,920 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 5170 transitions. Word has length 32 [2021-02-19 17:16:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:10,920 INFO L480 AbstractCegarLoop]: Abstraction has 2090 states and 5170 transitions. [2021-02-19 17:16:10,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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) [2021-02-19 17:16:10,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 5170 transitions. [2021-02-19 17:16:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:10,922 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:10,922 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:11,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 17:16:11,123 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:11,123 INFO L82 PathProgramCache]: Analyzing trace with hash -639720684, now seen corresponding path program 10 times [2021-02-19 17:16:11,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:11,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208081702] [2021-02-19 17:16:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:11,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208081702] [2021-02-19 17:16:11,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625385291] [2021-02-19 17:16:11,179 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:11,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:11,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:11,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:11,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:11,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:16:11,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288512175] [2021-02-19 17:16:11,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:11,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:11,256 INFO L87 Difference]: Start difference. First operand 2090 states and 5170 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:11,526 INFO L93 Difference]: Finished difference Result 2760 states and 6520 transitions. [2021-02-19 17:16:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:11,529 INFO L225 Difference]: With dead ends: 2760 [2021-02-19 17:16:11,530 INFO L226 Difference]: Without dead ends: 2727 [2021-02-19 17:16:11,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-02-19 17:16:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2064. [2021-02-19 17:16:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.477944740668929) internal successors, (5112), 2063 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5112 transitions. [2021-02-19 17:16:11,552 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5112 transitions. Word has length 35 [2021-02-19 17:16:11,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:11,552 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 5112 transitions. [2021-02-19 17:16:11,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5112 transitions. [2021-02-19 17:16:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:11,554 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:11,554 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:11,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:11,754 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:11,755 INFO L82 PathProgramCache]: Analyzing trace with hash 827459284, now seen corresponding path program 15 times [2021-02-19 17:16:11,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:11,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404470080] [2021-02-19 17:16:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404470080] [2021-02-19 17:16:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755303242] [2021-02-19 17:16:11,825 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:11,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:16:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:16:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:11,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:11,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-02-19 17:16:11,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917545309] [2021-02-19 17:16:11,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:11,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:11,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:11,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:11,975 INFO L87 Difference]: Start difference. First operand 2064 states and 5112 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:12,330 INFO L93 Difference]: Finished difference Result 2201 states and 5349 transitions. [2021-02-19 17:16:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:12,333 INFO L225 Difference]: With dead ends: 2201 [2021-02-19 17:16:12,333 INFO L226 Difference]: Without dead ends: 2079 [2021-02-19 17:16:12,333 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-02-19 17:16:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 2022. [2021-02-19 17:16:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.475507174666007) internal successors, (5003), 2021 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 5003 transitions. [2021-02-19 17:16:12,353 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 5003 transitions. Word has length 35 [2021-02-19 17:16:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:12,353 INFO L480 AbstractCegarLoop]: Abstraction has 2022 states and 5003 transitions. [2021-02-19 17:16:12,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 5003 transitions. [2021-02-19 17:16:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:12,354 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:12,355 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:12,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:12,555 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:12,555 INFO L82 PathProgramCache]: Analyzing trace with hash 999532704, now seen corresponding path program 16 times [2021-02-19 17:16:12,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:12,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560504709] [2021-02-19 17:16:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:12,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560504709] [2021-02-19 17:16:12,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708617522] [2021-02-19 17:16:12,622 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:12,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:12,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:12,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:12,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:12,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131614336] [2021-02-19 17:16:12,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:12,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:12,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:12,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:12,715 INFO L87 Difference]: Start difference. First operand 2022 states and 5003 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:12,851 INFO L93 Difference]: Finished difference Result 2201 states and 5360 transitions. [2021-02-19 17:16:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:12,854 INFO L225 Difference]: With dead ends: 2201 [2021-02-19 17:16:12,854 INFO L226 Difference]: Without dead ends: 2201 [2021-02-19 17:16:12,854 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:12,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-02-19 17:16:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2022. [2021-02-19 17:16:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.475507174666007) internal successors, (5003), 2021 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 5003 transitions. [2021-02-19 17:16:12,872 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 5003 transitions. Word has length 35 [2021-02-19 17:16:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:12,872 INFO L480 AbstractCegarLoop]: Abstraction has 2022 states and 5003 transitions. [2021-02-19 17:16:12,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 5003 transitions. [2021-02-19 17:16:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:12,874 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:12,874 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:13,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 17:16:13,075 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490585, now seen corresponding path program 11 times [2021-02-19 17:16:13,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:13,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466306064] [2021-02-19 17:16:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:13,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466306064] [2021-02-19 17:16:13,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792976364] [2021-02-19 17:16:13,137 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:13,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:16:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:13,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:13,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:13,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 14 [2021-02-19 17:16:13,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572777630] [2021-02-19 17:16:13,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:16:13,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:13,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:16:13,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:13,262 INFO L87 Difference]: Start difference. First operand 2022 states and 5003 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:13,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:13,438 INFO L93 Difference]: Finished difference Result 2798 states and 6661 transitions. [2021-02-19 17:16:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:13,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:13,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:13,441 INFO L225 Difference]: With dead ends: 2798 [2021-02-19 17:16:13,441 INFO L226 Difference]: Without dead ends: 2752 [2021-02-19 17:16:13,441 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:16:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-02-19 17:16:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2114. [2021-02-19 17:16:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 2.478466635115949) internal successors, (5237), 2113 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 5237 transitions. [2021-02-19 17:16:13,465 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 5237 transitions. Word has length 35 [2021-02-19 17:16:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:13,465 INFO L480 AbstractCegarLoop]: Abstraction has 2114 states and 5237 transitions. [2021-02-19 17:16:13,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 5237 transitions. [2021-02-19 17:16:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:13,467 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:13,467 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:13,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 17:16:13,682 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:13,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:13,682 INFO L82 PathProgramCache]: Analyzing trace with hash -497710873, now seen corresponding path program 12 times [2021-02-19 17:16:13,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:13,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037814259] [2021-02-19 17:16:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:13,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037814259] [2021-02-19 17:16:13,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886313686] [2021-02-19 17:16:13,734 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:13,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:16:13,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:13,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:13,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:13,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:13,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2021-02-19 17:16:13,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563106787] [2021-02-19 17:16:13,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:13,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:13,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:13,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:13,837 INFO L87 Difference]: Start difference. First operand 2114 states and 5237 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:13,976 INFO L93 Difference]: Finished difference Result 3176 states and 7548 transitions. [2021-02-19 17:16:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:13,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:13,979 INFO L225 Difference]: With dead ends: 3176 [2021-02-19 17:16:13,979 INFO L226 Difference]: Without dead ends: 3176 [2021-02-19 17:16:13,979 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-02-19 17:16:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2209. [2021-02-19 17:16:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.4909420289855073) internal successors, (5500), 2208 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 5500 transitions. [2021-02-19 17:16:14,005 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 5500 transitions. Word has length 35 [2021-02-19 17:16:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:14,005 INFO L480 AbstractCegarLoop]: Abstraction has 2209 states and 5500 transitions. [2021-02-19 17:16:14,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 5500 transitions. [2021-02-19 17:16:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:14,007 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:14,007 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:14,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:14,207 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:14,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:14,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2063528020, now seen corresponding path program 13 times [2021-02-19 17:16:14,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:14,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608078354] [2021-02-19 17:16:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608078354] [2021-02-19 17:16:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576747647] [2021-02-19 17:16:14,266 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:14,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:14,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:14,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:14,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044176900] [2021-02-19 17:16:14,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:14,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:14,345 INFO L87 Difference]: Start difference. First operand 2209 states and 5500 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:14,504 INFO L93 Difference]: Finished difference Result 2851 states and 6844 transitions. [2021-02-19 17:16:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:14,507 INFO L225 Difference]: With dead ends: 2851 [2021-02-19 17:16:14,507 INFO L226 Difference]: Without dead ends: 2824 [2021-02-19 17:16:14,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-02-19 17:16:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2301. [2021-02-19 17:16:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.484782608695652) internal successors, (5715), 2300 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 5715 transitions. [2021-02-19 17:16:14,531 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 5715 transitions. Word has length 35 [2021-02-19 17:16:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:14,531 INFO L480 AbstractCegarLoop]: Abstraction has 2301 states and 5715 transitions. [2021-02-19 17:16:14,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 5715 transitions. [2021-02-19 17:16:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:14,534 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:14,534 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:14,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:14,748 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:14,749 INFO L82 PathProgramCache]: Analyzing trace with hash -731106284, now seen corresponding path program 17 times [2021-02-19 17:16:14,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:14,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236880623] [2021-02-19 17:16:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:14,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236880623] [2021-02-19 17:16:14,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688754364] [2021-02-19 17:16:14,797 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:14,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:16:14,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:14,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:14,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:14,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:16:14,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157751836] [2021-02-19 17:16:14,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:14,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:14,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:14,906 INFO L87 Difference]: Start difference. First operand 2301 states and 5715 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:15,121 INFO L93 Difference]: Finished difference Result 2591 states and 6262 transitions. [2021-02-19 17:16:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:15,124 INFO L225 Difference]: With dead ends: 2591 [2021-02-19 17:16:15,124 INFO L226 Difference]: Without dead ends: 2551 [2021-02-19 17:16:15,124 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-02-19 17:16:15,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2283. [2021-02-19 17:16:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 2.4794040315512706) internal successors, (5658), 2282 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 5658 transitions. [2021-02-19 17:16:15,145 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 5658 transitions. Word has length 35 [2021-02-19 17:16:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:15,145 INFO L480 AbstractCegarLoop]: Abstraction has 2283 states and 5658 transitions. [2021-02-19 17:16:15,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 5658 transitions. [2021-02-19 17:16:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:15,147 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:15,147 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:15,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:15,347 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:15,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642464, now seen corresponding path program 18 times [2021-02-19 17:16:15,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:15,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700036691] [2021-02-19 17:16:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:15,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700036691] [2021-02-19 17:16:15,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665736701] [2021-02-19 17:16:15,409 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:15,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:16:15,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:15,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:15,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:15,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:15,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474665471] [2021-02-19 17:16:15,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:15,492 INFO L87 Difference]: Start difference. First operand 2283 states and 5658 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:15,662 INFO L93 Difference]: Finished difference Result 2751 states and 6621 transitions. [2021-02-19 17:16:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:15,665 INFO L225 Difference]: With dead ends: 2751 [2021-02-19 17:16:15,665 INFO L226 Difference]: Without dead ends: 2724 [2021-02-19 17:16:15,665 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-02-19 17:16:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2280. [2021-02-19 17:16:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4787187362878456) internal successors, (5649), 2279 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5649 transitions. [2021-02-19 17:16:15,686 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5649 transitions. Word has length 35 [2021-02-19 17:16:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:15,686 INFO L480 AbstractCegarLoop]: Abstraction has 2280 states and 5649 transitions. [2021-02-19 17:16:15,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5649 transitions. [2021-02-19 17:16:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:15,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:15,688 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:15,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-02-19 17:16:15,889 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash 797274870, now seen corresponding path program 19 times [2021-02-19 17:16:15,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:15,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772267] [2021-02-19 17:16:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:15,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772267] [2021-02-19 17:16:15,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683793431] [2021-02-19 17:16:15,936 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:15,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:15,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:16,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:16,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:16,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678168603] [2021-02-19 17:16:16,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:16,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:16,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:16,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:16,009 INFO L87 Difference]: Start difference. First operand 2280 states and 5649 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:16,252 INFO L93 Difference]: Finished difference Result 2999 states and 7153 transitions. [2021-02-19 17:16:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:16,255 INFO L225 Difference]: With dead ends: 2999 [2021-02-19 17:16:16,255 INFO L226 Difference]: Without dead ends: 2987 [2021-02-19 17:16:16,255 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2021-02-19 17:16:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 2269. [2021-02-19 17:16:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.4775132275132274) internal successors, (5619), 2268 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 5619 transitions. [2021-02-19 17:16:16,276 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 5619 transitions. Word has length 35 [2021-02-19 17:16:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:16,276 INFO L480 AbstractCegarLoop]: Abstraction has 2269 states and 5619 transitions. [2021-02-19 17:16:16,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 5619 transitions. [2021-02-19 17:16:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:16,278 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:16,278 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:16,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-02-19 17:16:16,479 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash 559213353, now seen corresponding path program 14 times [2021-02-19 17:16:16,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:16,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818294982] [2021-02-19 17:16:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818294982] [2021-02-19 17:16:16,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52622693] [2021-02-19 17:16:16,515 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:16,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:16,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:16,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-02-19 17:16:16,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834654249] [2021-02-19 17:16:16,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:16,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:16,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:16,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:16,594 INFO L87 Difference]: Start difference. First operand 2269 states and 5619 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:16,708 INFO L93 Difference]: Finished difference Result 3112 states and 7419 transitions. [2021-02-19 17:16:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:16,711 INFO L225 Difference]: With dead ends: 3112 [2021-02-19 17:16:16,711 INFO L226 Difference]: Without dead ends: 3104 [2021-02-19 17:16:16,711 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-02-19 17:16:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2376. [2021-02-19 17:16:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 2.5010526315789474) internal successors, (5940), 2375 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 5940 transitions. [2021-02-19 17:16:16,734 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 5940 transitions. Word has length 35 [2021-02-19 17:16:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:16,734 INFO L480 AbstractCegarLoop]: Abstraction has 2376 states and 5940 transitions. [2021-02-19 17:16:16,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 5940 transitions. [2021-02-19 17:16:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:16,736 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:16,736 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:16,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-02-19 17:16:16,937 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -62667057, now seen corresponding path program 15 times [2021-02-19 17:16:16,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:16,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132317724] [2021-02-19 17:16:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:16,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132317724] [2021-02-19 17:16:16,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606439282] [2021-02-19 17:16:16,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:17,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:16:17,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:17,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:17,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:17,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:17,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-02-19 17:16:17,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921753055] [2021-02-19 17:16:17,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:17,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:17,062 INFO L87 Difference]: Start difference. First operand 2376 states and 5940 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:17,182 INFO L93 Difference]: Finished difference Result 3491 states and 8281 transitions. [2021-02-19 17:16:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:17,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:17,186 INFO L225 Difference]: With dead ends: 3491 [2021-02-19 17:16:17,186 INFO L226 Difference]: Without dead ends: 3491 [2021-02-19 17:16:17,186 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2021-02-19 17:16:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 2384. [2021-02-19 17:16:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 2.498531263113722) internal successors, (5954), 2383 states have internal predecessors, (5954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 5954 transitions. [2021-02-19 17:16:17,218 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 5954 transitions. Word has length 35 [2021-02-19 17:16:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:17,218 INFO L480 AbstractCegarLoop]: Abstraction has 2384 states and 5954 transitions. [2021-02-19 17:16:17,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 5954 transitions. [2021-02-19 17:16:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:17,220 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:17,220 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:17,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:17,421 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1700239513, now seen corresponding path program 16 times [2021-02-19 17:16:17,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:17,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912721935] [2021-02-19 17:16:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:17,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912721935] [2021-02-19 17:16:17,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988958172] [2021-02-19 17:16:17,464 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:17,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:17,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:17,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:17,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:17,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:17,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-02-19 17:16:17,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577245171] [2021-02-19 17:16:17,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:17,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:17,552 INFO L87 Difference]: Start difference. First operand 2384 states and 5954 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:17,704 INFO L93 Difference]: Finished difference Result 3214 states and 7628 transitions. [2021-02-19 17:16:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:17,707 INFO L225 Difference]: With dead ends: 3214 [2021-02-19 17:16:17,707 INFO L226 Difference]: Without dead ends: 3214 [2021-02-19 17:16:17,707 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-02-19 17:16:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2183. [2021-02-19 17:16:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 2.480293308890926) internal successors, (5412), 2182 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 5412 transitions. [2021-02-19 17:16:17,730 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 5412 transitions. Word has length 35 [2021-02-19 17:16:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:17,730 INFO L480 AbstractCegarLoop]: Abstraction has 2183 states and 5412 transitions. [2021-02-19 17:16:17,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 5412 transitions. [2021-02-19 17:16:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:17,731 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:17,732 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:17,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-02-19 17:16:17,932 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash -491585529, now seen corresponding path program 20 times [2021-02-19 17:16:17,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:17,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234033370] [2021-02-19 17:16:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234033370] [2021-02-19 17:16:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625810722] [2021-02-19 17:16:17,968 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:17,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:17,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:17,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:17,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:18,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:18,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 17:16:18,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043022066] [2021-02-19 17:16:18,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:18,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:18,043 INFO L87 Difference]: Start difference. First operand 2183 states and 5412 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:18,133 INFO L93 Difference]: Finished difference Result 2850 states and 6871 transitions. [2021-02-19 17:16:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:16:18,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:18,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:18,136 INFO L225 Difference]: With dead ends: 2850 [2021-02-19 17:16:18,136 INFO L226 Difference]: Without dead ends: 2850 [2021-02-19 17:16:18,137 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-02-19 17:16:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2296. [2021-02-19 17:16:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.512854030501089) internal successors, (5767), 2295 states have internal predecessors, (5767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5767 transitions. [2021-02-19 17:16:18,164 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5767 transitions. Word has length 35 [2021-02-19 17:16:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:18,165 INFO L480 AbstractCegarLoop]: Abstraction has 2296 states and 5767 transitions. [2021-02-19 17:16:18,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5767 transitions. [2021-02-19 17:16:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:18,167 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:18,167 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:18,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:18,378 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash -729647046, now seen corresponding path program 17 times [2021-02-19 17:16:18,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:18,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324703962] [2021-02-19 17:16:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:18,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324703962] [2021-02-19 17:16:18,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036672280] [2021-02-19 17:16:18,430 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:18,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:16:18,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:18,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:18,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:18,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:18,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354099913] [2021-02-19 17:16:18,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:18,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:18,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:18,514 INFO L87 Difference]: Start difference. First operand 2296 states and 5767 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:18,674 INFO L93 Difference]: Finished difference Result 3117 states and 7487 transitions. [2021-02-19 17:16:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:18,677 INFO L225 Difference]: With dead ends: 3117 [2021-02-19 17:16:18,677 INFO L226 Difference]: Without dead ends: 3062 [2021-02-19 17:16:18,677 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-02-19 17:16:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2364. [2021-02-19 17:16:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 2.5112145577655522) internal successors, (5934), 2363 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 5934 transitions. [2021-02-19 17:16:18,700 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 5934 transitions. Word has length 35 [2021-02-19 17:16:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:18,700 INFO L480 AbstractCegarLoop]: Abstraction has 2364 states and 5934 transitions. [2021-02-19 17:16:18,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 5934 transitions. [2021-02-19 17:16:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:18,702 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:18,702 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:18,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:18,903 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:18,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2011623393, now seen corresponding path program 21 times [2021-02-19 17:16:18,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:18,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616330040] [2021-02-19 17:16:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:16:18,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616330040] [2021-02-19 17:16:18,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306744446] [2021-02-19 17:16:18,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:18,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:16:18,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:18,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:16:19,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:19,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 17:16:19,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445623667] [2021-02-19 17:16:19,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:19,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:19,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:19,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:19,019 INFO L87 Difference]: Start difference. First operand 2364 states and 5934 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:19,090 INFO L93 Difference]: Finished difference Result 2831 states and 6829 transitions. [2021-02-19 17:16:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:16:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:19,093 INFO L225 Difference]: With dead ends: 2831 [2021-02-19 17:16:19,093 INFO L226 Difference]: Without dead ends: 2828 [2021-02-19 17:16:19,093 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-02-19 17:16:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2362. [2021-02-19 17:16:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 2.508259212198221) internal successors, (5922), 2361 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 5922 transitions. [2021-02-19 17:16:19,121 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 5922 transitions. Word has length 35 [2021-02-19 17:16:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:19,121 INFO L480 AbstractCegarLoop]: Abstraction has 2362 states and 5922 transitions. [2021-02-19 17:16:19,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 5922 transitions. [2021-02-19 17:16:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:19,123 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:19,123 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:19,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:19,324 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:19,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:19,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2076281337, now seen corresponding path program 22 times [2021-02-19 17:16:19,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:19,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168081596] [2021-02-19 17:16:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:19,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168081596] [2021-02-19 17:16:19,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941610211] [2021-02-19 17:16:19,361 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:19,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:19,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:19,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:19,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:19,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:16:19,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625474857] [2021-02-19 17:16:19,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:19,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:19,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:19,436 INFO L87 Difference]: Start difference. First operand 2362 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-02-19 17:16:19,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:19,549 INFO L93 Difference]: Finished difference Result 2865 states and 6866 transitions. [2021-02-19 17:16:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:19,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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 35 [2021-02-19 17:16:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:19,552 INFO L225 Difference]: With dead ends: 2865 [2021-02-19 17:16:19,552 INFO L226 Difference]: Without dead ends: 2847 [2021-02-19 17:16:19,552 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-02-19 17:16:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2380. [2021-02-19 17:16:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.503572929802438) internal successors, (5956), 2379 states have internal predecessors, (5956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 5956 transitions. [2021-02-19 17:16:19,583 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 5956 transitions. Word has length 35 [2021-02-19 17:16:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:19,584 INFO L480 AbstractCegarLoop]: Abstraction has 2380 states and 5956 transitions. [2021-02-19 17:16:19,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-02-19 17:16:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 5956 transitions. [2021-02-19 17:16:19,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:19,585 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:19,585 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:19,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:19,786 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash 770685946, now seen corresponding path program 23 times [2021-02-19 17:16:19,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:19,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85835333] [2021-02-19 17:16:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:19,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85835333] [2021-02-19 17:16:19,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59133151] [2021-02-19 17:16:19,832 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:19,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:16:19,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:19,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:19,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:19,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:16:19,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745759646] [2021-02-19 17:16:19,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:19,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:19,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:19,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:19,914 INFO L87 Difference]: Start difference. First operand 2380 states and 5956 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:20,158 INFO L93 Difference]: Finished difference Result 2794 states and 6728 transitions. [2021-02-19 17:16:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:20,162 INFO L225 Difference]: With dead ends: 2794 [2021-02-19 17:16:20,162 INFO L226 Difference]: Without dead ends: 2706 [2021-02-19 17:16:20,162 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-02-19 17:16:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2267. [2021-02-19 17:16:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2266 states have (on average 2.494263018534863) internal successors, (5652), 2266 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 5652 transitions. [2021-02-19 17:16:20,188 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 5652 transitions. Word has length 35 [2021-02-19 17:16:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:20,189 INFO L480 AbstractCegarLoop]: Abstraction has 2267 states and 5652 transitions. [2021-02-19 17:16:20,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 5652 transitions. [2021-02-19 17:16:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:20,191 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:20,191 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:20,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:20,391 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:20,391 INFO L82 PathProgramCache]: Analyzing trace with hash -149721, now seen corresponding path program 18 times [2021-02-19 17:16:20,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:20,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418390738] [2021-02-19 17:16:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:20,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418390738] [2021-02-19 17:16:20,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225881553] [2021-02-19 17:16:20,438 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:20,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:16:20,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:20,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:20,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:20,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:20,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-02-19 17:16:20,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331068581] [2021-02-19 17:16:20,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:20,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:20,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:20,515 INFO L87 Difference]: Start difference. First operand 2267 states and 5652 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:20,636 INFO L93 Difference]: Finished difference Result 2943 states and 7060 transitions. [2021-02-19 17:16:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:20,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:20,640 INFO L225 Difference]: With dead ends: 2943 [2021-02-19 17:16:20,640 INFO L226 Difference]: Without dead ends: 2933 [2021-02-19 17:16:20,640 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-02-19 17:16:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2378. [2021-02-19 17:16:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.4981068573832563) internal successors, (5938), 2377 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 5938 transitions. [2021-02-19 17:16:20,676 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 5938 transitions. Word has length 35 [2021-02-19 17:16:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:20,676 INFO L480 AbstractCegarLoop]: Abstraction has 2378 states and 5938 transitions. [2021-02-19 17:16:20,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 5938 transitions. [2021-02-19 17:16:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:20,678 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:20,678 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:20,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-02-19 17:16:20,878 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:20,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:20,878 INFO L82 PathProgramCache]: Analyzing trace with hash -463341087, now seen corresponding path program 24 times [2021-02-19 17:16:20,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:20,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969178446] [2021-02-19 17:16:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:20,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969178446] [2021-02-19 17:16:20,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512638672] [2021-02-19 17:16:20,925 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:20,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:20,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:20,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:21,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:21,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:16:21,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599984387] [2021-02-19 17:16:21,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:21,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:21,007 INFO L87 Difference]: Start difference. First operand 2378 states and 5938 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:21,132 INFO L93 Difference]: Finished difference Result 2885 states and 6878 transitions. [2021-02-19 17:16:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:21,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:21,135 INFO L225 Difference]: With dead ends: 2885 [2021-02-19 17:16:21,135 INFO L226 Difference]: Without dead ends: 2861 [2021-02-19 17:16:21,135 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-02-19 17:16:21,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2242. [2021-02-19 17:16:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 2.4792503346720216) internal successors, (5556), 2241 states have internal predecessors, (5556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 5556 transitions. [2021-02-19 17:16:21,159 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 5556 transitions. Word has length 35 [2021-02-19 17:16:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:21,159 INFO L480 AbstractCegarLoop]: Abstraction has 2242 states and 5556 transitions. [2021-02-19 17:16:21,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 5556 transitions. [2021-02-19 17:16:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:21,161 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:21,161 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:21,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:21,375 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:21,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063662, now seen corresponding path program 25 times [2021-02-19 17:16:21,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:21,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085660272] [2021-02-19 17:16:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:21,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085660272] [2021-02-19 17:16:21,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17300979] [2021-02-19 17:16:21,425 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:21,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:21,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:16:21,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638429963] [2021-02-19 17:16:21,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:21,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:21,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:21,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:21,499 INFO L87 Difference]: Start difference. First operand 2242 states and 5556 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:21,733 INFO L93 Difference]: Finished difference Result 2947 states and 6928 transitions. [2021-02-19 17:16:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:21,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:21,736 INFO L225 Difference]: With dead ends: 2947 [2021-02-19 17:16:21,736 INFO L226 Difference]: Without dead ends: 2875 [2021-02-19 17:16:21,736 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-02-19 17:16:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2136. [2021-02-19 17:16:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.4782201405152224) internal successors, (5291), 2135 states have internal predecessors, (5291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 5291 transitions. [2021-02-19 17:16:21,763 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 5291 transitions. Word has length 35 [2021-02-19 17:16:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:21,763 INFO L480 AbstractCegarLoop]: Abstraction has 2136 states and 5291 transitions. [2021-02-19 17:16:21,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 5291 transitions. [2021-02-19 17:16:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:21,765 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:21,765 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:21,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:21,982 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:21,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1593961707, now seen corresponding path program 19 times [2021-02-19 17:16:21,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:21,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213841497] [2021-02-19 17:16:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:22,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213841497] [2021-02-19 17:16:22,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508573030] [2021-02-19 17:16:22,018 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:22,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:22,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-02-19 17:16:22,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301663748] [2021-02-19 17:16:22,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:22,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:22,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:22,106 INFO L87 Difference]: Start difference. First operand 2136 states and 5291 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:22,252 INFO L93 Difference]: Finished difference Result 3361 states and 7950 transitions. [2021-02-19 17:16:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:22,256 INFO L225 Difference]: With dead ends: 3361 [2021-02-19 17:16:22,256 INFO L226 Difference]: Without dead ends: 3361 [2021-02-19 17:16:22,256 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-02-19 17:16:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2207. [2021-02-19 17:16:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.49637352674524) internal successors, (5507), 2206 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 5507 transitions. [2021-02-19 17:16:22,287 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 5507 transitions. Word has length 35 [2021-02-19 17:16:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:22,287 INFO L480 AbstractCegarLoop]: Abstraction has 2207 states and 5507 transitions. [2021-02-19 17:16:22,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 5507 transitions. [2021-02-19 17:16:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:22,289 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:22,289 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:22,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-02-19 17:16:22,502 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:22,502 INFO L82 PathProgramCache]: Analyzing trace with hash -43610749, now seen corresponding path program 20 times [2021-02-19 17:16:22,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:22,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298312494] [2021-02-19 17:16:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:22,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298312494] [2021-02-19 17:16:22,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382476842] [2021-02-19 17:16:22,546 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:22,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:22,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:22,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:22,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:22,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-02-19 17:16:22,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293807906] [2021-02-19 17:16:22,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:22,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:22,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:22,622 INFO L87 Difference]: Start difference. First operand 2207 states and 5507 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:22,807 INFO L93 Difference]: Finished difference Result 3348 states and 7925 transitions. [2021-02-19 17:16:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:22,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:22,811 INFO L225 Difference]: With dead ends: 3348 [2021-02-19 17:16:22,811 INFO L226 Difference]: Without dead ends: 3348 [2021-02-19 17:16:22,811 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-02-19 17:16:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2224. [2021-02-19 17:16:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.5006747638326585) internal successors, (5559), 2223 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5559 transitions. [2021-02-19 17:16:22,837 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5559 transitions. Word has length 35 [2021-02-19 17:16:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:22,837 INFO L480 AbstractCegarLoop]: Abstraction has 2224 states and 5559 transitions. [2021-02-19 17:16:22,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5559 transitions. [2021-02-19 17:16:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:22,839 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:22,839 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:23,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-02-19 17:16:23,039 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1733605913, now seen corresponding path program 21 times [2021-02-19 17:16:23,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:23,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147809225] [2021-02-19 17:16:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:23,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147809225] [2021-02-19 17:16:23,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51900200] [2021-02-19 17:16:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:23,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:16:23,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:23,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:23,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:23,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:23,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:16:23,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277029586] [2021-02-19 17:16:23,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:23,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:23,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:23,191 INFO L87 Difference]: Start difference. First operand 2224 states and 5559 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:23,374 INFO L93 Difference]: Finished difference Result 2976 states and 7062 transitions. [2021-02-19 17:16:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:23,377 INFO L225 Difference]: With dead ends: 2976 [2021-02-19 17:16:23,377 INFO L226 Difference]: Without dead ends: 2976 [2021-02-19 17:16:23,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-02-19 17:16:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 1957. [2021-02-19 17:16:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1956 states have (on average 2.486196319018405) internal successors, (4863), 1956 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 4863 transitions. [2021-02-19 17:16:23,401 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 4863 transitions. Word has length 35 [2021-02-19 17:16:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:23,401 INFO L480 AbstractCegarLoop]: Abstraction has 1957 states and 4863 transitions. [2021-02-19 17:16:23,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 4863 transitions. [2021-02-19 17:16:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:23,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:23,403 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:23,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-02-19 17:16:23,603 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460985, now seen corresponding path program 26 times [2021-02-19 17:16:23,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:23,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18443491] [2021-02-19 17:16:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:23,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18443491] [2021-02-19 17:16:23,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475063876] [2021-02-19 17:16:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:23,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:23,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:23,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:23,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:23,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:23,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:16:23,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453169830] [2021-02-19 17:16:23,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:23,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:23,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:23,736 INFO L87 Difference]: Start difference. First operand 1957 states and 4863 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:23,855 INFO L93 Difference]: Finished difference Result 2321 states and 5547 transitions. [2021-02-19 17:16:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:23,858 INFO L225 Difference]: With dead ends: 2321 [2021-02-19 17:16:23,858 INFO L226 Difference]: Without dead ends: 2294 [2021-02-19 17:16:23,858 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:16:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-02-19 17:16:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1966. [2021-02-19 17:16:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 2.482442748091603) internal successors, (4878), 1965 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 4878 transitions. [2021-02-19 17:16:23,876 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 4878 transitions. Word has length 35 [2021-02-19 17:16:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:23,876 INFO L480 AbstractCegarLoop]: Abstraction has 1966 states and 4878 transitions. [2021-02-19 17:16:23,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 4878 transitions. [2021-02-19 17:16:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:23,878 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:23,878 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:24,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 17:16:24,092 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1762298527, now seen corresponding path program 27 times [2021-02-19 17:16:24,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:24,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071796775] [2021-02-19 17:16:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071796775] [2021-02-19 17:16:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390193197] [2021-02-19 17:16:24,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:24,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:16:24,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:24,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:24,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:16:24,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656750617] [2021-02-19 17:16:24,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:24,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:24,233 INFO L87 Difference]: Start difference. First operand 1966 states and 4878 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:24,400 INFO L93 Difference]: Finished difference Result 2657 states and 6397 transitions. [2021-02-19 17:16:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:24,403 INFO L225 Difference]: With dead ends: 2657 [2021-02-19 17:16:24,403 INFO L226 Difference]: Without dead ends: 2657 [2021-02-19 17:16:24,403 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-02-19 17:16:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 1901. [2021-02-19 17:16:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 2.5042105263157897) internal successors, (4758), 1900 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 4758 transitions. [2021-02-19 17:16:24,421 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 4758 transitions. Word has length 35 [2021-02-19 17:16:24,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:24,421 INFO L480 AbstractCegarLoop]: Abstraction has 1901 states and 4758 transitions. [2021-02-19 17:16:24,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 4758 transitions. [2021-02-19 17:16:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:24,422 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:24,423 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:24,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:24,623 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:24,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:24,623 INFO L82 PathProgramCache]: Analyzing trace with hash -208710828, now seen corresponding path program 22 times [2021-02-19 17:16:24,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:24,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225731047] [2021-02-19 17:16:24,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225731047] [2021-02-19 17:16:24,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806330584] [2021-02-19 17:16:24,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:24,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:24,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:24,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:24,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:16:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668408417] [2021-02-19 17:16:24,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:24,749 INFO L87 Difference]: Start difference. First operand 1901 states and 4758 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:24,972 INFO L93 Difference]: Finished difference Result 2516 states and 6043 transitions. [2021-02-19 17:16:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:24,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:24,975 INFO L225 Difference]: With dead ends: 2516 [2021-02-19 17:16:24,975 INFO L226 Difference]: Without dead ends: 2502 [2021-02-19 17:16:24,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2021-02-19 17:16:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1901. [2021-02-19 17:16:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 2.5078947368421054) internal successors, (4765), 1900 states have internal predecessors, (4765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 4765 transitions. [2021-02-19 17:16:24,994 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 4765 transitions. Word has length 35 [2021-02-19 17:16:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:24,994 INFO L480 AbstractCegarLoop]: Abstraction has 1901 states and 4765 transitions. [2021-02-19 17:16:24,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 4765 transitions. [2021-02-19 17:16:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:24,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:24,995 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:25,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:25,196 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:25,196 INFO L82 PathProgramCache]: Analyzing trace with hash -385601772, now seen corresponding path program 28 times [2021-02-19 17:16:25,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:25,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272703216] [2021-02-19 17:16:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:25,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272703216] [2021-02-19 17:16:25,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561636797] [2021-02-19 17:16:25,263 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:25,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:25,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:25,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:25,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:25,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:25,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 17:16:25,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127741716] [2021-02-19 17:16:25,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:16:25,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:16:25,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:25,400 INFO L87 Difference]: Start difference. First operand 1901 states and 4765 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-02-19 17:16:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:25,636 INFO L93 Difference]: Finished difference Result 1956 states and 4854 transitions. [2021-02-19 17:16:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:25,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 35 [2021-02-19 17:16:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:25,638 INFO L225 Difference]: With dead ends: 1956 [2021-02-19 17:16:25,638 INFO L226 Difference]: Without dead ends: 1918 [2021-02-19 17:16:25,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-02-19 17:16:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1892. [2021-02-19 17:16:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 2.5055526176626124) internal successors, (4738), 1891 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 4738 transitions. [2021-02-19 17:16:25,654 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 4738 transitions. Word has length 35 [2021-02-19 17:16:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:25,654 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 4738 transitions. [2021-02-19 17:16:25,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-02-19 17:16:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 4738 transitions. [2021-02-19 17:16:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:25,655 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:25,655 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:25,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:25,856 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170953, now seen corresponding path program 29 times [2021-02-19 17:16:25,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:25,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710997024] [2021-02-19 17:16:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710997024] [2021-02-19 17:16:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134694350] [2021-02-19 17:16:25,902 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:25,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:16:25,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:25,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:25,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:25,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:25,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-02-19 17:16:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007084200] [2021-02-19 17:16:25,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:25,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:25,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:25,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:25,995 INFO L87 Difference]: Start difference. First operand 1892 states and 4738 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:26,148 INFO L93 Difference]: Finished difference Result 2783 states and 6718 transitions. [2021-02-19 17:16:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:26,149 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:26,151 INFO L225 Difference]: With dead ends: 2783 [2021-02-19 17:16:26,151 INFO L226 Difference]: Without dead ends: 2783 [2021-02-19 17:16:26,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:16:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-02-19 17:16:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2022. [2021-02-19 17:16:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 2021 states have (on average 2.5472538347352796) internal successors, (5148), 2021 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 5148 transitions. [2021-02-19 17:16:26,173 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 5148 transitions. Word has length 35 [2021-02-19 17:16:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:26,174 INFO L480 AbstractCegarLoop]: Abstraction has 2022 states and 5148 transitions. [2021-02-19 17:16:26,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 5148 transitions. [2021-02-19 17:16:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:26,175 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:26,175 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:26,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-02-19 17:16:26,389 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash 780335286, now seen corresponding path program 23 times [2021-02-19 17:16:26,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:26,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701070291] [2021-02-19 17:16:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:26,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701070291] [2021-02-19 17:16:26,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699078043] [2021-02-19 17:16:26,438 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:26,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:16:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:26,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:26,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:26,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858815709] [2021-02-19 17:16:26,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:26,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:26,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:26,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:26,508 INFO L87 Difference]: Start difference. First operand 2022 states and 5148 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:26,711 INFO L93 Difference]: Finished difference Result 2467 states and 6075 transitions. [2021-02-19 17:16:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:26,713 INFO L225 Difference]: With dead ends: 2467 [2021-02-19 17:16:26,714 INFO L226 Difference]: Without dead ends: 2467 [2021-02-19 17:16:26,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-02-19 17:16:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2030. [2021-02-19 17:16:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.5490389354361755) internal successors, (5172), 2029 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5172 transitions. [2021-02-19 17:16:26,739 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5172 transitions. Word has length 35 [2021-02-19 17:16:26,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:26,739 INFO L480 AbstractCegarLoop]: Abstraction has 2030 states and 5172 transitions. [2021-02-19 17:16:26,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5172 transitions. [2021-02-19 17:16:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:26,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:26,740 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:26,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-02-19 17:16:26,941 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash -852961098, now seen corresponding path program 30 times [2021-02-19 17:16:26,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:26,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646211323] [2021-02-19 17:16:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:27,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646211323] [2021-02-19 17:16:27,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789576231] [2021-02-19 17:16:27,000 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:27,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:16:27,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:16:27,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:27,175 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 17:16:27,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-02-19 17:16:27,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:16:27,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:16:27,182 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:16:27,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:16:27,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2021-02-19 17:16:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:27,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:27,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-02-19 17:16:27,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984332240] [2021-02-19 17:16:27,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:27,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:27,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:27,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:27,222 INFO L87 Difference]: Start difference. First operand 2030 states and 5172 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) [2021-02-19 17:16:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:27,923 INFO L93 Difference]: Finished difference Result 2727 states and 6619 transitions. [2021-02-19 17:16:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:16:27,924 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 35 [2021-02-19 17:16:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:27,926 INFO L225 Difference]: With dead ends: 2727 [2021-02-19 17:16:27,926 INFO L226 Difference]: Without dead ends: 2704 [2021-02-19 17:16:27,926 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:16:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-02-19 17:16:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 1971. [2021-02-19 17:16:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1970 states have (on average 2.567005076142132) internal successors, (5057), 1970 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 5057 transitions. [2021-02-19 17:16:27,944 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 5057 transitions. Word has length 35 [2021-02-19 17:16:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:27,944 INFO L480 AbstractCegarLoop]: Abstraction has 1971 states and 5057 transitions. [2021-02-19 17:16:27,944 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) [2021-02-19 17:16:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 5057 transitions. [2021-02-19 17:16:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:27,945 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:27,945 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:28,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-02-19 17:16:28,146 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash 700626601, now seen corresponding path program 24 times [2021-02-19 17:16:28,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:28,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391546622] [2021-02-19 17:16:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:28,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391546622] [2021-02-19 17:16:28,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843920041] [2021-02-19 17:16:28,190 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:28,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:28,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:28,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-02-19 17:16:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50004653] [2021-02-19 17:16:28,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:16:28,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:16:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:28,282 INFO L87 Difference]: Start difference. First operand 1971 states and 5057 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:28,431 INFO L93 Difference]: Finished difference Result 2403 states and 5943 transitions. [2021-02-19 17:16:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:28,433 INFO L225 Difference]: With dead ends: 2403 [2021-02-19 17:16:28,434 INFO L226 Difference]: Without dead ends: 2387 [2021-02-19 17:16:28,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:16:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2021-02-19 17:16:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1957. [2021-02-19 17:16:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1956 states have (on average 2.571063394683027) internal successors, (5029), 1956 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 5029 transitions. [2021-02-19 17:16:28,455 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 5029 transitions. Word has length 35 [2021-02-19 17:16:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:28,455 INFO L480 AbstractCegarLoop]: Abstraction has 1957 states and 5029 transitions. [2021-02-19 17:16:28,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 5029 transitions. [2021-02-19 17:16:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:28,457 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:28,457 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:28,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 17:16:28,657 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1273584031, now seen corresponding path program 31 times [2021-02-19 17:16:28,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:28,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600356131] [2021-02-19 17:16:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:28,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600356131] [2021-02-19 17:16:28,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495240352] [2021-02-19 17:16:28,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:28,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:28,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:16:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360614476] [2021-02-19 17:16:28,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:28,780 INFO L87 Difference]: Start difference. First operand 1957 states and 5029 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:28,874 INFO L93 Difference]: Finished difference Result 2847 states and 7037 transitions. [2021-02-19 17:16:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:28,877 INFO L225 Difference]: With dead ends: 2847 [2021-02-19 17:16:28,877 INFO L226 Difference]: Without dead ends: 2847 [2021-02-19 17:16:28,877 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-02-19 17:16:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2129. [2021-02-19 17:16:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2128 states have (on average 2.6080827067669174) internal successors, (5550), 2128 states have internal predecessors, (5550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 5550 transitions. [2021-02-19 17:16:28,899 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 5550 transitions. Word has length 35 [2021-02-19 17:16:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:28,899 INFO L480 AbstractCegarLoop]: Abstraction has 2129 states and 5550 transitions. [2021-02-19 17:16:28,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 5550 transitions. [2021-02-19 17:16:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:28,901 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:28,901 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:29,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:29,115 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645548, now seen corresponding path program 25 times [2021-02-19 17:16:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:29,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959123245] [2021-02-19 17:16:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:29,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959123245] [2021-02-19 17:16:29,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509576194] [2021-02-19 17:16:29,168 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:29,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:29,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:29,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:29,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026497812] [2021-02-19 17:16:29,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:29,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:29,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:29,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:29,247 INFO L87 Difference]: Start difference. First operand 2129 states and 5550 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:29,435 INFO L93 Difference]: Finished difference Result 2551 states and 6430 transitions. [2021-02-19 17:16:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:29,438 INFO L225 Difference]: With dead ends: 2551 [2021-02-19 17:16:29,438 INFO L226 Difference]: Without dead ends: 2542 [2021-02-19 17:16:29,438 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-02-19 17:16:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2190. [2021-02-19 17:16:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 2.600274097761535) internal successors, (5692), 2189 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 5692 transitions. [2021-02-19 17:16:29,459 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 5692 transitions. Word has length 35 [2021-02-19 17:16:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:29,459 INFO L480 AbstractCegarLoop]: Abstraction has 2190 states and 5692 transitions. [2021-02-19 17:16:29,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 5692 transitions. [2021-02-19 17:16:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:29,461 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:29,461 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:29,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:29,662 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:29,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624891, now seen corresponding path program 32 times [2021-02-19 17:16:29,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:29,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387656411] [2021-02-19 17:16:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:29,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387656411] [2021-02-19 17:16:29,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573301744] [2021-02-19 17:16:29,700 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:29,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:29,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:29,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:29,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:16:29,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065084530] [2021-02-19 17:16:29,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:29,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:29,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:29,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:29,776 INFO L87 Difference]: Start difference. First operand 2190 states and 5692 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:29,865 INFO L93 Difference]: Finished difference Result 2865 states and 7074 transitions. [2021-02-19 17:16:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:29,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:29,868 INFO L225 Difference]: With dead ends: 2865 [2021-02-19 17:16:29,868 INFO L226 Difference]: Without dead ends: 2862 [2021-02-19 17:16:29,868 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2021-02-19 17:16:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2189. [2021-02-19 17:16:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 2.5987202925045705) internal successors, (5686), 2188 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 5686 transitions. [2021-02-19 17:16:29,892 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 5686 transitions. Word has length 35 [2021-02-19 17:16:29,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:29,893 INFO L480 AbstractCegarLoop]: Abstraction has 2189 states and 5686 transitions. [2021-02-19 17:16:29,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 5686 transitions. [2021-02-19 17:16:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:29,894 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:29,894 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:30,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-02-19 17:16:30,095 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:30,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687457, now seen corresponding path program 33 times [2021-02-19 17:16:30,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:30,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645633455] [2021-02-19 17:16:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:30,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645633455] [2021-02-19 17:16:30,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121924105] [2021-02-19 17:16:30,140 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:30,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:16:30,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:30,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:30,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:30,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:16:30,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136642592] [2021-02-19 17:16:30,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:30,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:30,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:30,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:30,209 INFO L87 Difference]: Start difference. First operand 2189 states and 5686 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:30,291 INFO L93 Difference]: Finished difference Result 2790 states and 7006 transitions. [2021-02-19 17:16:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:30,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:30,295 INFO L225 Difference]: With dead ends: 2790 [2021-02-19 17:16:30,295 INFO L226 Difference]: Without dead ends: 2778 [2021-02-19 17:16:30,295 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-02-19 17:16:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2189. [2021-02-19 17:16:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 2.5973491773308957) internal successors, (5683), 2188 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 5683 transitions. [2021-02-19 17:16:30,323 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 5683 transitions. Word has length 35 [2021-02-19 17:16:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:30,323 INFO L480 AbstractCegarLoop]: Abstraction has 2189 states and 5683 transitions. [2021-02-19 17:16:30,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 5683 transitions. [2021-02-19 17:16:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:30,325 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:30,325 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:30,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-02-19 17:16:30,525 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash -11312556, now seen corresponding path program 34 times [2021-02-19 17:16:30,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:30,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250214356] [2021-02-19 17:16:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:30,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250214356] [2021-02-19 17:16:30,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98134969] [2021-02-19 17:16:30,575 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:30,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:30,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:30,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:30,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:30,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:30,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:16:30,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317156328] [2021-02-19 17:16:30,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:30,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:30,658 INFO L87 Difference]: Start difference. First operand 2189 states and 5683 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:30,854 INFO L93 Difference]: Finished difference Result 2443 states and 6146 transitions. [2021-02-19 17:16:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:30,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:30,857 INFO L225 Difference]: With dead ends: 2443 [2021-02-19 17:16:30,857 INFO L226 Difference]: Without dead ends: 2362 [2021-02-19 17:16:30,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-02-19 17:16:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2099. [2021-02-19 17:16:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 2.607721639656816) internal successors, (5471), 2098 states have internal predecessors, (5471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 5471 transitions. [2021-02-19 17:16:30,877 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 5471 transitions. Word has length 35 [2021-02-19 17:16:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:30,877 INFO L480 AbstractCegarLoop]: Abstraction has 2099 states and 5471 transitions. [2021-02-19 17:16:30,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 5471 transitions. [2021-02-19 17:16:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:30,878 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:30,878 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:31,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:31,082 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:31,082 INFO L82 PathProgramCache]: Analyzing trace with hash -624848736, now seen corresponding path program 35 times [2021-02-19 17:16:31,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:31,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474766234] [2021-02-19 17:16:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:31,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474766234] [2021-02-19 17:16:31,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434110155] [2021-02-19 17:16:31,145 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:31,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:16:31,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:31,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:31,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:31,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:31,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60812621] [2021-02-19 17:16:31,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:31,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:31,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:31,217 INFO L87 Difference]: Start difference. First operand 2099 states and 5471 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:31,364 INFO L93 Difference]: Finished difference Result 2438 states and 6164 transitions. [2021-02-19 17:16:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:31,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:31,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:31,367 INFO L225 Difference]: With dead ends: 2438 [2021-02-19 17:16:31,367 INFO L226 Difference]: Without dead ends: 2426 [2021-02-19 17:16:31,367 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-02-19 17:16:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2101. [2021-02-19 17:16:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.607142857142857) internal successors, (5475), 2100 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5475 transitions. [2021-02-19 17:16:31,386 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5475 transitions. Word has length 35 [2021-02-19 17:16:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:31,386 INFO L480 AbstractCegarLoop]: Abstraction has 2101 states and 5475 transitions. [2021-02-19 17:16:31,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5475 transitions. [2021-02-19 17:16:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:31,388 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:31,388 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:31,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-02-19 17:16:31,589 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068598, now seen corresponding path program 36 times [2021-02-19 17:16:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:31,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563384100] [2021-02-19 17:16:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:31,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563384100] [2021-02-19 17:16:31,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3253642] [2021-02-19 17:16:31,642 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:31,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:16:31,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:31,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:31,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:31,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670560401] [2021-02-19 17:16:31,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:31,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:31,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:31,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:31,714 INFO L87 Difference]: Start difference. First operand 2101 states and 5475 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:31,955 INFO L93 Difference]: Finished difference Result 3130 states and 7650 transitions. [2021-02-19 17:16:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:31,959 INFO L225 Difference]: With dead ends: 3130 [2021-02-19 17:16:31,959 INFO L226 Difference]: Without dead ends: 3076 [2021-02-19 17:16:31,959 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-02-19 17:16:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2160. [2021-02-19 17:16:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 2.607225567392311) internal successors, (5629), 2159 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 5629 transitions. [2021-02-19 17:16:31,985 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 5629 transitions. Word has length 35 [2021-02-19 17:16:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:31,985 INFO L480 AbstractCegarLoop]: Abstraction has 2160 states and 5629 transitions. [2021-02-19 17:16:31,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 5629 transitions. [2021-02-19 17:16:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:31,986 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:31,986 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:32,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:32,187 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:32,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339589, now seen corresponding path program 37 times [2021-02-19 17:16:32,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:32,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447837411] [2021-02-19 17:16:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:32,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447837411] [2021-02-19 17:16:32,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136345691] [2021-02-19 17:16:32,235 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:32,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:32,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:16:32,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265293234] [2021-02-19 17:16:32,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:32,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:32,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:32,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:32,319 INFO L87 Difference]: Start difference. First operand 2160 states and 5629 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:32,416 INFO L93 Difference]: Finished difference Result 2797 states and 7011 transitions. [2021-02-19 17:16:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:32,419 INFO L225 Difference]: With dead ends: 2797 [2021-02-19 17:16:32,419 INFO L226 Difference]: Without dead ends: 2779 [2021-02-19 17:16:32,419 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-02-19 17:16:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2232. [2021-02-19 17:16:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.623487225459435) internal successors, (5853), 2231 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5853 transitions. [2021-02-19 17:16:32,442 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5853 transitions. Word has length 35 [2021-02-19 17:16:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:32,442 INFO L480 AbstractCegarLoop]: Abstraction has 2232 states and 5853 transitions. [2021-02-19 17:16:32,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5853 transitions. [2021-02-19 17:16:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:32,444 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:32,444 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:32,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-02-19 17:16:32,645 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:32,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905132, now seen corresponding path program 38 times [2021-02-19 17:16:32,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:32,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75361583] [2021-02-19 17:16:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:32,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75361583] [2021-02-19 17:16:32,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281969906] [2021-02-19 17:16:32,698 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:32,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:32,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:32,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:32,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:16:32,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054707469] [2021-02-19 17:16:32,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:32,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:32,779 INFO L87 Difference]: Start difference. First operand 2232 states and 5853 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:33,155 INFO L93 Difference]: Finished difference Result 3892 states and 9431 transitions. [2021-02-19 17:16:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:16:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:33,159 INFO L225 Difference]: With dead ends: 3892 [2021-02-19 17:16:33,159 INFO L226 Difference]: Without dead ends: 3778 [2021-02-19 17:16:33,159 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2021-02-19 17:16:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 2365. [2021-02-19 17:16:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 2.6163282571912014) internal successors, (6185), 2364 states have internal predecessors, (6185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 6185 transitions. [2021-02-19 17:16:33,186 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 6185 transitions. Word has length 35 [2021-02-19 17:16:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:33,186 INFO L480 AbstractCegarLoop]: Abstraction has 2365 states and 6185 transitions. [2021-02-19 17:16:33,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 6185 transitions. [2021-02-19 17:16:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:33,188 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:33,188 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:33,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:33,388 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:33,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507809, now seen corresponding path program 39 times [2021-02-19 17:16:33,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:33,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913920510] [2021-02-19 17:16:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:33,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913920510] [2021-02-19 17:16:33,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099395998] [2021-02-19 17:16:33,445 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:33,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:16:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:33,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:33,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:16:33,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028155250] [2021-02-19 17:16:33,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:33,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:33,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:33,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:33,526 INFO L87 Difference]: Start difference. First operand 2365 states and 6185 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:33,638 INFO L93 Difference]: Finished difference Result 3020 states and 7504 transitions. [2021-02-19 17:16:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:33,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:33,642 INFO L225 Difference]: With dead ends: 3020 [2021-02-19 17:16:33,642 INFO L226 Difference]: Without dead ends: 2993 [2021-02-19 17:16:33,642 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-02-19 17:16:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2365. [2021-02-19 17:16:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 2.6150592216582065) internal successors, (6182), 2364 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 6182 transitions. [2021-02-19 17:16:33,666 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 6182 transitions. Word has length 35 [2021-02-19 17:16:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:33,666 INFO L480 AbstractCegarLoop]: Abstraction has 2365 states and 6182 transitions. [2021-02-19 17:16:33,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 6182 transitions. [2021-02-19 17:16:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:33,668 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:33,668 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:33,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-02-19 17:16:33,879 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213622, now seen corresponding path program 40 times [2021-02-19 17:16:33,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:33,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144559409] [2021-02-19 17:16:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:33,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144559409] [2021-02-19 17:16:33,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243529181] [2021-02-19 17:16:33,949 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:33,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:33,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:33,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:16:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:16:34,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 17:16:34,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:16:34,072 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-02-19 17:16:34,072 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:16:34,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:16:34,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-02-19 17:16:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:34,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:34,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 17:16:34,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101801475] [2021-02-19 17:16:34,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:16:34,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:34,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:16:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:34,081 INFO L87 Difference]: Start difference. First operand 2365 states and 6182 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-02-19 17:16:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:34,802 INFO L93 Difference]: Finished difference Result 5500 states and 12979 transitions. [2021-02-19 17:16:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 17:16:34,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 35 [2021-02-19 17:16:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:34,808 INFO L225 Difference]: With dead ends: 5500 [2021-02-19 17:16:34,809 INFO L226 Difference]: Without dead ends: 5285 [2021-02-19 17:16:34,809 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=1843, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 17:16:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2021-02-19 17:16:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 3148. [2021-02-19 17:16:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 2.5951700031776297) internal successors, (8167), 3147 states have internal predecessors, (8167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 8167 transitions. [2021-02-19 17:16:34,858 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 8167 transitions. Word has length 35 [2021-02-19 17:16:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:34,858 INFO L480 AbstractCegarLoop]: Abstraction has 3148 states and 8167 transitions. [2021-02-19 17:16:34,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-02-19 17:16:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 8167 transitions. [2021-02-19 17:16:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:34,859 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:34,859 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:35,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-02-19 17:16:35,060 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:35,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:35,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152105, now seen corresponding path program 26 times [2021-02-19 17:16:35,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:35,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072308983] [2021-02-19 17:16:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:35,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072308983] [2021-02-19 17:16:35,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277979622] [2021-02-19 17:16:35,108 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:35,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:35,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:35,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:35,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:35,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:35,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-02-19 17:16:35,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429779061] [2021-02-19 17:16:35,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:35,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:35,181 INFO L87 Difference]: Start difference. First operand 3148 states and 8167 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:35,295 INFO L93 Difference]: Finished difference Result 3993 states and 9944 transitions. [2021-02-19 17:16:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:35,299 INFO L225 Difference]: With dead ends: 3993 [2021-02-19 17:16:35,299 INFO L226 Difference]: Without dead ends: 3985 [2021-02-19 17:16:35,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3985 states. [2021-02-19 17:16:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3985 to 3007. [2021-02-19 17:16:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 2.5721889554224884) internal successors, (7732), 3006 states have internal predecessors, (7732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 7732 transitions. [2021-02-19 17:16:35,332 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 7732 transitions. Word has length 35 [2021-02-19 17:16:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:35,332 INFO L480 AbstractCegarLoop]: Abstraction has 3007 states and 7732 transitions. [2021-02-19 17:16:35,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 7732 transitions. [2021-02-19 17:16:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:35,334 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:35,334 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:35,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:35,534 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:35,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:35,534 INFO L82 PathProgramCache]: Analyzing trace with hash 752271695, now seen corresponding path program 27 times [2021-02-19 17:16:35,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:35,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301923485] [2021-02-19 17:16:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:35,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301923485] [2021-02-19 17:16:35,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951483693] [2021-02-19 17:16:35,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:35,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:16:35,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:35,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:35,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-02-19 17:16:35,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261894370] [2021-02-19 17:16:35,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:35,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:35,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:35,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:35,673 INFO L87 Difference]: Start difference. First operand 3007 states and 7732 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:35,857 INFO L93 Difference]: Finished difference Result 3786 states and 9211 transitions. [2021-02-19 17:16:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:35,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:35,861 INFO L225 Difference]: With dead ends: 3786 [2021-02-19 17:16:35,861 INFO L226 Difference]: Without dead ends: 3786 [2021-02-19 17:16:35,861 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-02-19 17:16:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 2881. [2021-02-19 17:16:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 2.584722222222222) internal successors, (7444), 2880 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 7444 transitions. [2021-02-19 17:16:35,898 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 7444 transitions. Word has length 35 [2021-02-19 17:16:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:35,899 INFO L480 AbstractCegarLoop]: Abstraction has 2881 states and 7444 transitions. [2021-02-19 17:16:35,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 7444 transitions. [2021-02-19 17:16:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:35,900 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:35,900 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:36,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:36,101 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash -789180805, now seen corresponding path program 41 times [2021-02-19 17:16:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:36,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666225921] [2021-02-19 17:16:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:36,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666225921] [2021-02-19 17:16:36,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73155] [2021-02-19 17:16:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:36,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:36,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:16:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:36,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:36,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-02-19 17:16:36,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379239717] [2021-02-19 17:16:36,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:16:36,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:16:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:36,253 INFO L87 Difference]: Start difference. First operand 2881 states and 7444 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:36,427 INFO L93 Difference]: Finished difference Result 3453 states and 8633 transitions. [2021-02-19 17:16:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:36,431 INFO L225 Difference]: With dead ends: 3453 [2021-02-19 17:16:36,431 INFO L226 Difference]: Without dead ends: 3415 [2021-02-19 17:16:36,431 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2021-02-19 17:16:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 2890. [2021-02-19 17:16:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 2.5815160955347873) internal successors, (7458), 2889 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 7458 transitions. [2021-02-19 17:16:36,459 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 7458 transitions. Word has length 35 [2021-02-19 17:16:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:36,459 INFO L480 AbstractCegarLoop]: Abstraction has 2890 states and 7458 transitions. [2021-02-19 17:16:36,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 7458 transitions. [2021-02-19 17:16:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:36,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:36,460 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:36,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-02-19 17:16:36,661 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:36,661 INFO L82 PathProgramCache]: Analyzing trace with hash -323121436, now seen corresponding path program 42 times [2021-02-19 17:16:36,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:36,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247439335] [2021-02-19 17:16:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:36,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247439335] [2021-02-19 17:16:36,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155383756] [2021-02-19 17:16:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:36,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:16:36,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:36,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:16:36,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:36,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:36,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 17:16:36,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530330367] [2021-02-19 17:16:36,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:36,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:36,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:36,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:36,784 INFO L87 Difference]: Start difference. First operand 2890 states and 7458 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:36,914 INFO L93 Difference]: Finished difference Result 3737 states and 9409 transitions. [2021-02-19 17:16:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:16:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:16:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:36,918 INFO L225 Difference]: With dead ends: 3737 [2021-02-19 17:16:36,918 INFO L226 Difference]: Without dead ends: 3706 [2021-02-19 17:16:36,918 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-02-19 17:16:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3334. [2021-02-19 17:16:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 2.5625562556255628) internal successors, (8541), 3333 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 8541 transitions. [2021-02-19 17:16:36,959 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 8541 transitions. Word has length 38 [2021-02-19 17:16:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:36,959 INFO L480 AbstractCegarLoop]: Abstraction has 3334 states and 8541 transitions. [2021-02-19 17:16:36,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 8541 transitions. [2021-02-19 17:16:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:36,961 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:36,961 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:37,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:37,162 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash 988310278, now seen corresponding path program 43 times [2021-02-19 17:16:37,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:37,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532596056] [2021-02-19 17:16:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:16:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532596056] [2021-02-19 17:16:37,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523135222] [2021-02-19 17:16:37,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:16:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:16:37,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:37,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 17:16:37,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124709934] [2021-02-19 17:16:37,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:37,269 INFO L87 Difference]: Start difference. First operand 3334 states and 8541 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:37,406 INFO L93 Difference]: Finished difference Result 3927 states and 9822 transitions. [2021-02-19 17:16:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:16:37,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:16:37,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:37,411 INFO L225 Difference]: With dead ends: 3927 [2021-02-19 17:16:37,411 INFO L226 Difference]: Without dead ends: 3889 [2021-02-19 17:16:37,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-02-19 17:16:37,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3334. [2021-02-19 17:16:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 2.561056105610561) internal successors, (8536), 3333 states have internal predecessors, (8536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 8536 transitions. [2021-02-19 17:16:37,452 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 8536 transitions. Word has length 38 [2021-02-19 17:16:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:37,452 INFO L480 AbstractCegarLoop]: Abstraction has 3334 states and 8536 transitions. [2021-02-19 17:16:37,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 8536 transitions. [2021-02-19 17:16:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:37,454 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:37,454 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:37,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-02-19 17:16:37,656 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028254, now seen corresponding path program 44 times [2021-02-19 17:16:37,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:37,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378866136] [2021-02-19 17:16:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:16:37,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378866136] [2021-02-19 17:16:37,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294047276] [2021-02-19 17:16:37,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:37,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:37,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:37,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:37,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-02-19 17:16:37,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287072256] [2021-02-19 17:16:37,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:16:37,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:37,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:16:37,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:37,829 INFO L87 Difference]: Start difference. First operand 3334 states and 8536 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:38,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:38,291 INFO L93 Difference]: Finished difference Result 5262 states and 12566 transitions. [2021-02-19 17:16:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:16:38,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:16:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:38,296 INFO L225 Difference]: With dead ends: 5262 [2021-02-19 17:16:38,297 INFO L226 Difference]: Without dead ends: 5193 [2021-02-19 17:16:38,297 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2021-02-19 17:16:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 3398. [2021-02-19 17:16:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 2.5578451574919048) internal successors, (8689), 3397 states have internal predecessors, (8689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 8689 transitions. [2021-02-19 17:16:38,337 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 8689 transitions. Word has length 38 [2021-02-19 17:16:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:38,337 INFO L480 AbstractCegarLoop]: Abstraction has 3398 states and 8689 transitions. [2021-02-19 17:16:38,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 8689 transitions. [2021-02-19 17:16:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:38,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:38,340 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:38,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:38,540 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1803249030, now seen corresponding path program 45 times [2021-02-19 17:16:38,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:38,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936422692] [2021-02-19 17:16:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:16:38,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936422692] [2021-02-19 17:16:38,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251983641] [2021-02-19 17:16:38,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:38,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:16:38,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:38,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:38,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:38,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-02-19 17:16:38,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432398142] [2021-02-19 17:16:38,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:16:38,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:38,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:16:38,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:38,701 INFO L87 Difference]: Start difference. First operand 3398 states and 8689 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:39,190 INFO L93 Difference]: Finished difference Result 5285 states and 12575 transitions. [2021-02-19 17:16:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:16:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:16:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:39,195 INFO L225 Difference]: With dead ends: 5285 [2021-02-19 17:16:39,195 INFO L226 Difference]: Without dead ends: 5214 [2021-02-19 17:16:39,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2021-02-19 17:16:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 3448. [2021-02-19 17:16:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 2.5497534087612417) internal successors, (8789), 3447 states have internal predecessors, (8789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 8789 transitions. [2021-02-19 17:16:39,232 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 8789 transitions. Word has length 38 [2021-02-19 17:16:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:39,232 INFO L480 AbstractCegarLoop]: Abstraction has 3448 states and 8789 transitions. [2021-02-19 17:16:39,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 8789 transitions. [2021-02-19 17:16:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:39,234 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:39,234 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:39,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-02-19 17:16:39,435 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:39,435 INFO L82 PathProgramCache]: Analyzing trace with hash -18948908, now seen corresponding path program 46 times [2021-02-19 17:16:39,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:39,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438959960] [2021-02-19 17:16:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:39,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438959960] [2021-02-19 17:16:39,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123798820] [2021-02-19 17:16:39,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:39,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:39,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:39,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:39,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:16:39,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812075310] [2021-02-19 17:16:39,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:16:39,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:39,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:16:39,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:39,604 INFO L87 Difference]: Start difference. First operand 3448 states and 8789 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:39,862 INFO L93 Difference]: Finished difference Result 4666 states and 11427 transitions. [2021-02-19 17:16:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:39,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:39,875 INFO L225 Difference]: With dead ends: 4666 [2021-02-19 17:16:39,875 INFO L226 Difference]: Without dead ends: 4666 [2021-02-19 17:16:39,875 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-02-19 17:16:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3588. [2021-02-19 17:16:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.5586841371619737) internal successors, (9178), 3587 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9178 transitions. [2021-02-19 17:16:39,915 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9178 transitions. Word has length 41 [2021-02-19 17:16:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:39,915 INFO L480 AbstractCegarLoop]: Abstraction has 3588 states and 9178 transitions. [2021-02-19 17:16:39,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9178 transitions. [2021-02-19 17:16:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:39,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:39,918 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:40,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:40,119 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:40,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:40,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282649, now seen corresponding path program 28 times [2021-02-19 17:16:40,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:40,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463449400] [2021-02-19 17:16:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:40,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463449400] [2021-02-19 17:16:40,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462874901] [2021-02-19 17:16:40,221 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:40,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:40,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:40,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:40,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:16:40,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407032486] [2021-02-19 17:16:40,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:16:40,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:40,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:16:40,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:40,303 INFO L87 Difference]: Start difference. First operand 3588 states and 9178 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:40,711 INFO L93 Difference]: Finished difference Result 5034 states and 12331 transitions. [2021-02-19 17:16:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:40,712 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:40,717 INFO L225 Difference]: With dead ends: 5034 [2021-02-19 17:16:40,717 INFO L226 Difference]: Without dead ends: 4993 [2021-02-19 17:16:40,717 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-02-19 17:16:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 3804. [2021-02-19 17:16:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 2.5535103865369444) internal successors, (9711), 3803 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 9711 transitions. [2021-02-19 17:16:40,760 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 9711 transitions. Word has length 41 [2021-02-19 17:16:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:40,760 INFO L480 AbstractCegarLoop]: Abstraction has 3804 states and 9711 transitions. [2021-02-19 17:16:40,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 9711 transitions. [2021-02-19 17:16:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:40,763 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:40,763 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:40,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-02-19 17:16:40,963 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:40,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:40,963 INFO L82 PathProgramCache]: Analyzing trace with hash -934319384, now seen corresponding path program 47 times [2021-02-19 17:16:40,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:40,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126922360] [2021-02-19 17:16:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:41,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126922360] [2021-02-19 17:16:41,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497413229] [2021-02-19 17:16:41,012 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:41,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:16:41,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:41,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:41,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 14 [2021-02-19 17:16:41,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284861936] [2021-02-19 17:16:41,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:16:41,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:41,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:16:41,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:41,118 INFO L87 Difference]: Start difference. First operand 3804 states and 9711 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:41,322 INFO L93 Difference]: Finished difference Result 4790 states and 11730 transitions. [2021-02-19 17:16:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:41,327 INFO L225 Difference]: With dead ends: 4790 [2021-02-19 17:16:41,328 INFO L226 Difference]: Without dead ends: 4787 [2021-02-19 17:16:41,328 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4787 states. [2021-02-19 17:16:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4787 to 3702. [2021-02-19 17:16:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 2.538232910024318) internal successors, (9394), 3701 states have internal predecessors, (9394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 9394 transitions. [2021-02-19 17:16:41,368 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 9394 transitions. Word has length 41 [2021-02-19 17:16:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:41,368 INFO L480 AbstractCegarLoop]: Abstraction has 3702 states and 9394 transitions. [2021-02-19 17:16:41,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 9394 transitions. [2021-02-19 17:16:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:41,371 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:41,371 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:41,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:41,571 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash -292213002, now seen corresponding path program 48 times [2021-02-19 17:16:41,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:41,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299978597] [2021-02-19 17:16:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299978597] [2021-02-19 17:16:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034687224] [2021-02-19 17:16:41,617 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:41,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:16:41,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:41,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:41,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:16:41,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436342562] [2021-02-19 17:16:41,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:41,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:41,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:41,710 INFO L87 Difference]: Start difference. First operand 3702 states and 9394 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:41,810 INFO L93 Difference]: Finished difference Result 4219 states and 10531 transitions. [2021-02-19 17:16:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:41,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:41,814 INFO L225 Difference]: With dead ends: 4219 [2021-02-19 17:16:41,814 INFO L226 Difference]: Without dead ends: 4207 [2021-02-19 17:16:41,814 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4207 states. [2021-02-19 17:16:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4207 to 3702. [2021-02-19 17:16:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 2.537422318292353) internal successors, (9391), 3701 states have internal predecessors, (9391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 9391 transitions. [2021-02-19 17:16:41,853 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 9391 transitions. Word has length 41 [2021-02-19 17:16:41,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:41,853 INFO L480 AbstractCegarLoop]: Abstraction has 3702 states and 9391 transitions. [2021-02-19 17:16:41,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 9391 transitions. [2021-02-19 17:16:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:41,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:41,856 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:42,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-02-19 17:16:42,056 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1923251609, now seen corresponding path program 49 times [2021-02-19 17:16:42,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:42,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175659786] [2021-02-19 17:16:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:42,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175659786] [2021-02-19 17:16:42,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179069722] [2021-02-19 17:16:42,141 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:42,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:42,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 17:16:42,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536491776] [2021-02-19 17:16:42,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:16:42,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:16:42,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:42,335 INFO L87 Difference]: Start difference. First operand 3702 states and 9391 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-02-19 17:16:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:42,711 INFO L93 Difference]: Finished difference Result 3888 states and 9701 transitions. [2021-02-19 17:16:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:42,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 41 [2021-02-19 17:16:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:42,715 INFO L225 Difference]: With dead ends: 3888 [2021-02-19 17:16:42,715 INFO L226 Difference]: Without dead ends: 3766 [2021-02-19 17:16:42,715 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2021-02-19 17:16:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3680. [2021-02-19 17:16:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 2.5273172057624356) internal successors, (9298), 3679 states have internal predecessors, (9298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 9298 transitions. [2021-02-19 17:16:42,751 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 9298 transitions. Word has length 41 [2021-02-19 17:16:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:42,752 INFO L480 AbstractCegarLoop]: Abstraction has 3680 states and 9298 transitions. [2021-02-19 17:16:42,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-02-19 17:16:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 9298 transitions. [2021-02-19 17:16:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:42,755 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:42,755 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:42,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:42,956 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:42,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1073104025, now seen corresponding path program 50 times [2021-02-19 17:16:42,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:42,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679811580] [2021-02-19 17:16:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679811580] [2021-02-19 17:16:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667896036] [2021-02-19 17:16:43,022 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:43,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:43,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:43,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:43,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:43,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:43,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:43,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83238648] [2021-02-19 17:16:43,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:43,100 INFO L87 Difference]: Start difference. First operand 3680 states and 9298 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:43,295 INFO L93 Difference]: Finished difference Result 3989 states and 9911 transitions. [2021-02-19 17:16:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:43,299 INFO L225 Difference]: With dead ends: 3989 [2021-02-19 17:16:43,299 INFO L226 Difference]: Without dead ends: 3953 [2021-02-19 17:16:43,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2021-02-19 17:16:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 3670. [2021-02-19 17:16:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 2.5322976287816843) internal successors, (9291), 3669 states have internal predecessors, (9291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 9291 transitions. [2021-02-19 17:16:43,334 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 9291 transitions. Word has length 41 [2021-02-19 17:16:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:43,335 INFO L480 AbstractCegarLoop]: Abstraction has 3670 states and 9291 transitions. [2021-02-19 17:16:43,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 9291 transitions. [2021-02-19 17:16:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:43,338 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:43,338 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:43,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-02-19 17:16:43,539 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:43,539 INFO L82 PathProgramCache]: Analyzing trace with hash 665060404, now seen corresponding path program 29 times [2021-02-19 17:16:43,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:43,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906378945] [2021-02-19 17:16:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:43,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906378945] [2021-02-19 17:16:43,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401450125] [2021-02-19 17:16:43,623 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:43,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:16:43,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:43,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:43,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:43,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-02-19 17:16:43,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304904180] [2021-02-19 17:16:43,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:16:43,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:43,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:16:43,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:43,744 INFO L87 Difference]: Start difference. First operand 3670 states and 9291 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2021-02-19 17:16:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:43,979 INFO L93 Difference]: Finished difference Result 4996 states and 11981 transitions. [2021-02-19 17:16:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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 41 [2021-02-19 17:16:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:43,984 INFO L225 Difference]: With dead ends: 4996 [2021-02-19 17:16:43,984 INFO L226 Difference]: Without dead ends: 4938 [2021-02-19 17:16:43,984 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-02-19 17:16:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 3620. [2021-02-19 17:16:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.492401215805471) internal successors, (9020), 3619 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9020 transitions. [2021-02-19 17:16:44,023 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9020 transitions. Word has length 41 [2021-02-19 17:16:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:44,024 INFO L480 AbstractCegarLoop]: Abstraction has 3620 states and 9020 transitions. [2021-02-19 17:16:44,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 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) [2021-02-19 17:16:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9020 transitions. [2021-02-19 17:16:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:44,026 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:44,026 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:44,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-02-19 17:16:44,228 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash 9364314, now seen corresponding path program 30 times [2021-02-19 17:16:44,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:44,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020286777] [2021-02-19 17:16:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:44,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020286777] [2021-02-19 17:16:44,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392894731] [2021-02-19 17:16:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:44,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:16:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:44,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:44,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:44,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-02-19 17:16:44,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072540924] [2021-02-19 17:16:44,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:44,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:44,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:44,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:44,427 INFO L87 Difference]: Start difference. First operand 3620 states and 9020 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:44,561 INFO L93 Difference]: Finished difference Result 5537 states and 13349 transitions. [2021-02-19 17:16:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:44,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:44,566 INFO L225 Difference]: With dead ends: 5537 [2021-02-19 17:16:44,566 INFO L226 Difference]: Without dead ends: 5537 [2021-02-19 17:16:44,566 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2021-02-19 17:16:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 3941. [2021-02-19 17:16:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 2.5423857868020305) internal successors, (10017), 3940 states have internal predecessors, (10017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 10017 transitions. [2021-02-19 17:16:44,612 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 10017 transitions. Word has length 41 [2021-02-19 17:16:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:44,612 INFO L480 AbstractCegarLoop]: Abstraction has 3941 states and 10017 transitions. [2021-02-19 17:16:44,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 10017 transitions. [2021-02-19 17:16:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:44,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:44,614 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:44,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:44,816 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917243, now seen corresponding path program 31 times [2021-02-19 17:16:44,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:44,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452698919] [2021-02-19 17:16:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452698919] [2021-02-19 17:16:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3305254] [2021-02-19 17:16:44,879 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:44,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:44,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:44,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701472546] [2021-02-19 17:16:44,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:44,958 INFO L87 Difference]: Start difference. First operand 3941 states and 10017 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:45,185 INFO L93 Difference]: Finished difference Result 4962 states and 12162 transitions. [2021-02-19 17:16:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:45,190 INFO L225 Difference]: With dead ends: 4962 [2021-02-19 17:16:45,190 INFO L226 Difference]: Without dead ends: 4927 [2021-02-19 17:16:45,190 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2021-02-19 17:16:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 4121. [2021-02-19 17:16:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4121 states, 4120 states have (on average 2.536650485436893) internal successors, (10451), 4120 states have internal predecessors, (10451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 10451 transitions. [2021-02-19 17:16:45,250 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 10451 transitions. Word has length 41 [2021-02-19 17:16:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:45,250 INFO L480 AbstractCegarLoop]: Abstraction has 4121 states and 10451 transitions. [2021-02-19 17:16:45,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 10451 transitions. [2021-02-19 17:16:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:45,254 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:45,254 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:45,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:45,468 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353196, now seen corresponding path program 51 times [2021-02-19 17:16:45,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:45,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887428766] [2021-02-19 17:16:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:45,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887428766] [2021-02-19 17:16:45,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657371166] [2021-02-19 17:16:45,524 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:45,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:16:45,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:45,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:45,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:45,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:16:45,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960582416] [2021-02-19 17:16:45,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:45,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:45,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:45,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:45,607 INFO L87 Difference]: Start difference. First operand 4121 states and 10451 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:45,717 INFO L93 Difference]: Finished difference Result 4927 states and 12136 transitions. [2021-02-19 17:16:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:45,722 INFO L225 Difference]: With dead ends: 4927 [2021-02-19 17:16:45,723 INFO L226 Difference]: Without dead ends: 4924 [2021-02-19 17:16:45,723 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4924 states. [2021-02-19 17:16:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 4107. [2021-02-19 17:16:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4107 states, 4106 states have (on average 2.5331222601071604) internal successors, (10401), 4106 states have internal predecessors, (10401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4107 states to 4107 states and 10401 transitions. [2021-02-19 17:16:45,766 INFO L78 Accepts]: Start accepts. Automaton has 4107 states and 10401 transitions. Word has length 41 [2021-02-19 17:16:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:45,766 INFO L480 AbstractCegarLoop]: Abstraction has 4107 states and 10401 transitions. [2021-02-19 17:16:45,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4107 states and 10401 transitions. [2021-02-19 17:16:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:45,769 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:45,769 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:45,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-02-19 17:16:45,969 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415762, now seen corresponding path program 52 times [2021-02-19 17:16:45,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:45,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850410446] [2021-02-19 17:16:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:46,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850410446] [2021-02-19 17:16:46,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694284756] [2021-02-19 17:16:46,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:46,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:46,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:46,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:46,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:46,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:16:46,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23106752] [2021-02-19 17:16:46,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:46,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:46,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:46,096 INFO L87 Difference]: Start difference. First operand 4107 states and 10401 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:46,258 INFO L93 Difference]: Finished difference Result 4946 states and 12130 transitions. [2021-02-19 17:16:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:46,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:46,263 INFO L225 Difference]: With dead ends: 4946 [2021-02-19 17:16:46,263 INFO L226 Difference]: Without dead ends: 4928 [2021-02-19 17:16:46,263 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-02-19 17:16:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4167. [2021-02-19 17:16:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4167 states, 4166 states have (on average 2.530244839174268) internal successors, (10541), 4166 states have internal predecessors, (10541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4167 states to 4167 states and 10541 transitions. [2021-02-19 17:16:46,322 INFO L78 Accepts]: Start accepts. Automaton has 4167 states and 10541 transitions. Word has length 41 [2021-02-19 17:16:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:46,322 INFO L480 AbstractCegarLoop]: Abstraction has 4167 states and 10541 transitions. [2021-02-19 17:16:46,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4167 states and 10541 transitions. [2021-02-19 17:16:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:46,325 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:46,325 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:46,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:46,526 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:46,526 INFO L82 PathProgramCache]: Analyzing trace with hash -83584251, now seen corresponding path program 53 times [2021-02-19 17:16:46,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:46,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145775024] [2021-02-19 17:16:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:46,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145775024] [2021-02-19 17:16:46,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466284804] [2021-02-19 17:16:46,588 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:46,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:16:46,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:46,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:46,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 17:16:46,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404774038] [2021-02-19 17:16:46,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:46,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:46,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:46,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:46,689 INFO L87 Difference]: Start difference. First operand 4167 states and 10541 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2021-02-19 17:16:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:46,987 INFO L93 Difference]: Finished difference Result 4659 states and 11457 transitions. [2021-02-19 17:16:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:46,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 41 [2021-02-19 17:16:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:46,993 INFO L225 Difference]: With dead ends: 4659 [2021-02-19 17:16:46,993 INFO L226 Difference]: Without dead ends: 4609 [2021-02-19 17:16:46,993 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4609 states. [2021-02-19 17:16:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4609 to 4133. [2021-02-19 17:16:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4132 states have (on average 2.528073572120039) internal successors, (10446), 4132 states have internal predecessors, (10446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 10446 transitions. [2021-02-19 17:16:47,040 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 10446 transitions. Word has length 41 [2021-02-19 17:16:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:47,040 INFO L480 AbstractCegarLoop]: Abstraction has 4133 states and 10446 transitions. [2021-02-19 17:16:47,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2021-02-19 17:16:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 10446 transitions. [2021-02-19 17:16:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:47,043 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:47,043 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:47,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-02-19 17:16:47,243 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash -697120431, now seen corresponding path program 54 times [2021-02-19 17:16:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:47,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674901150] [2021-02-19 17:16:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:47,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674901150] [2021-02-19 17:16:47,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465161769] [2021-02-19 17:16:47,310 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:47,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:16:47,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:47,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:16:47,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:47,491 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 17:16:47,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-02-19 17:16:47,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:16:47,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:16:47,500 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:16:47,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:16:47,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-02-19 17:16:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:47,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:47,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-02-19 17:16:47,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570230176] [2021-02-19 17:16:47,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:47,542 INFO L87 Difference]: Start difference. First operand 4133 states and 10446 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 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) [2021-02-19 17:16:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:49,289 INFO L93 Difference]: Finished difference Result 6719 states and 15891 transitions. [2021-02-19 17:16:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 17:16:49,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:49,296 INFO L225 Difference]: With dead ends: 6719 [2021-02-19 17:16:49,296 INFO L226 Difference]: Without dead ends: 6662 [2021-02-19 17:16:49,297 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1121, Invalid=5359, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 17:16:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2021-02-19 17:16:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4250. [2021-02-19 17:16:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 2.537773593786773) internal successors, (10783), 4249 states have internal predecessors, (10783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 10783 transitions. [2021-02-19 17:16:49,358 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 10783 transitions. Word has length 41 [2021-02-19 17:16:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:49,358 INFO L480 AbstractCegarLoop]: Abstraction has 4250 states and 10783 transitions. [2021-02-19 17:16:49,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 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) [2021-02-19 17:16:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 10783 transitions. [2021-02-19 17:16:49,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:49,362 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:49,362 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:49,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-02-19 17:16:49,563 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:49,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:49,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796903, now seen corresponding path program 55 times [2021-02-19 17:16:49,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:49,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424501784] [2021-02-19 17:16:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:49,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424501784] [2021-02-19 17:16:49,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289040124] [2021-02-19 17:16:49,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:49,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:49,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:16:49,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205120809] [2021-02-19 17:16:49,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:49,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:49,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:49,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:49,720 INFO L87 Difference]: Start difference. First operand 4250 states and 10783 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:50,006 INFO L93 Difference]: Finished difference Result 5227 states and 12758 transitions. [2021-02-19 17:16:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:50,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:50,012 INFO L225 Difference]: With dead ends: 5227 [2021-02-19 17:16:50,012 INFO L226 Difference]: Without dead ends: 5215 [2021-02-19 17:16:50,012 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-02-19 17:16:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 4278. [2021-02-19 17:16:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4277 states have (on average 2.5365910685059623) internal successors, (10849), 4277 states have internal predecessors, (10849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 10849 transitions. [2021-02-19 17:16:50,064 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 10849 transitions. Word has length 41 [2021-02-19 17:16:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:50,065 INFO L480 AbstractCegarLoop]: Abstraction has 4278 states and 10849 transitions. [2021-02-19 17:16:50,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 10849 transitions. [2021-02-19 17:16:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:50,068 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:50,068 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:50,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-02-19 17:16:50,268 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:50,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735386, now seen corresponding path program 32 times [2021-02-19 17:16:50,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:50,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554959610] [2021-02-19 17:16:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:50,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554959610] [2021-02-19 17:16:50,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820425312] [2021-02-19 17:16:50,322 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:50,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:50,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:50,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:50,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:50,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-02-19 17:16:50,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521381197] [2021-02-19 17:16:50,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:50,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:50,408 INFO L87 Difference]: Start difference. First operand 4278 states and 10849 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) [2021-02-19 17:16:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:50,545 INFO L93 Difference]: Finished difference Result 5666 states and 13760 transitions. [2021-02-19 17:16:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:50,545 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 41 [2021-02-19 17:16:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:50,551 INFO L225 Difference]: With dead ends: 5666 [2021-02-19 17:16:50,552 INFO L226 Difference]: Without dead ends: 5658 [2021-02-19 17:16:50,552 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5658 states. [2021-02-19 17:16:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5658 to 4407. [2021-02-19 17:16:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4406 states have (on average 2.550385837494326) internal successors, (11237), 4406 states have internal predecessors, (11237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 11237 transitions. [2021-02-19 17:16:50,611 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 11237 transitions. Word has length 41 [2021-02-19 17:16:50,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:50,611 INFO L480 AbstractCegarLoop]: Abstraction has 4407 states and 11237 transitions. [2021-02-19 17:16:50,611 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) [2021-02-19 17:16:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 11237 transitions. [2021-02-19 17:16:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:50,615 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:50,615 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:50,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-02-19 17:16:50,818 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 584854976, now seen corresponding path program 33 times [2021-02-19 17:16:50,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:50,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101490703] [2021-02-19 17:16:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:50,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101490703] [2021-02-19 17:16:50,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886034361] [2021-02-19 17:16:50,865 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:50,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:16:50,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:50,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:50,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:50,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-02-19 17:16:50,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245187126] [2021-02-19 17:16:50,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:50,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:50,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:50,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:50,954 INFO L87 Difference]: Start difference. First operand 4407 states and 11237 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) [2021-02-19 17:16:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:51,116 INFO L93 Difference]: Finished difference Result 6276 states and 15174 transitions. [2021-02-19 17:16:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:51,116 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 41 [2021-02-19 17:16:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:51,123 INFO L225 Difference]: With dead ends: 6276 [2021-02-19 17:16:51,123 INFO L226 Difference]: Without dead ends: 6276 [2021-02-19 17:16:51,123 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6276 states. [2021-02-19 17:16:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6276 to 4410. [2021-02-19 17:16:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 4409 states have (on average 2.5502381492401907) internal successors, (11244), 4409 states have internal predecessors, (11244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 11244 transitions. [2021-02-19 17:16:51,185 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 11244 transitions. Word has length 41 [2021-02-19 17:16:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:51,185 INFO L480 AbstractCegarLoop]: Abstraction has 4410 states and 11244 transitions. [2021-02-19 17:16:51,186 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) [2021-02-19 17:16:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 11244 transitions. [2021-02-19 17:16:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:51,189 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:51,189 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:51,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-02-19 17:16:51,390 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717480, now seen corresponding path program 34 times [2021-02-19 17:16:51,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:51,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721165452] [2021-02-19 17:16:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:51,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721165452] [2021-02-19 17:16:51,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245194663] [2021-02-19 17:16:51,452 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:51,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:51,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:51,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:51,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:51,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:16:51,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434900490] [2021-02-19 17:16:51,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:51,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:51,555 INFO L87 Difference]: Start difference. First operand 4410 states and 11244 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 17:16:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:51,733 INFO L93 Difference]: Finished difference Result 5872 states and 14224 transitions. [2021-02-19 17:16:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 41 [2021-02-19 17:16:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:51,740 INFO L225 Difference]: With dead ends: 5872 [2021-02-19 17:16:51,740 INFO L226 Difference]: Without dead ends: 5872 [2021-02-19 17:16:51,740 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:16:51,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-02-19 17:16:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 4293. [2021-02-19 17:16:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 2.544501397949674) internal successors, (10921), 4292 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 10921 transitions. [2021-02-19 17:16:51,796 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 10921 transitions. Word has length 41 [2021-02-19 17:16:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:51,796 INFO L480 AbstractCegarLoop]: Abstraction has 4293 states and 10921 transitions. [2021-02-19 17:16:51,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 17:16:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 10921 transitions. [2021-02-19 17:16:51,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:51,800 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:51,800 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:52,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-02-19 17:16:52,001 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611284, now seen corresponding path program 56 times [2021-02-19 17:16:52,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:52,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601788136] [2021-02-19 17:16:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:52,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601788136] [2021-02-19 17:16:52,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688464099] [2021-02-19 17:16:52,055 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:52,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:52,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:52,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:52,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:52,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:16:52,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184819935] [2021-02-19 17:16:52,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:52,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:52,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:52,137 INFO L87 Difference]: Start difference. First operand 4293 states and 10921 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:52,250 INFO L93 Difference]: Finished difference Result 4868 states and 12082 transitions. [2021-02-19 17:16:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:52,256 INFO L225 Difference]: With dead ends: 4868 [2021-02-19 17:16:52,256 INFO L226 Difference]: Without dead ends: 4850 [2021-02-19 17:16:52,256 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2021-02-19 17:16:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4291. [2021-02-19 17:16:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 4290 states have (on average 2.5426573426573427) internal successors, (10908), 4290 states have internal predecessors, (10908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 10908 transitions. [2021-02-19 17:16:52,318 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 10908 transitions. Word has length 41 [2021-02-19 17:16:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:52,318 INFO L480 AbstractCegarLoop]: Abstraction has 4291 states and 10908 transitions. [2021-02-19 17:16:52,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 10908 transitions. [2021-02-19 17:16:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:52,321 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:52,321 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:52,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-02-19 17:16:52,522 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360041, now seen corresponding path program 35 times [2021-02-19 17:16:52,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:52,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194658034] [2021-02-19 17:16:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:52,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194658034] [2021-02-19 17:16:52,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491452466] [2021-02-19 17:16:52,587 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:52,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:16:52,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:52,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:52,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:52,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:52,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159387071] [2021-02-19 17:16:52,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:52,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:52,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:52,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:52,678 INFO L87 Difference]: Start difference. First operand 4291 states and 10908 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:52,930 INFO L93 Difference]: Finished difference Result 5268 states and 12954 transitions. [2021-02-19 17:16:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:52,930 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:52,935 INFO L225 Difference]: With dead ends: 5268 [2021-02-19 17:16:52,935 INFO L226 Difference]: Without dead ends: 5243 [2021-02-19 17:16:52,936 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5243 states. [2021-02-19 17:16:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5243 to 4443. [2021-02-19 17:16:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 2.5380459252588925) internal successors, (11274), 4442 states have internal predecessors, (11274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 11274 transitions. [2021-02-19 17:16:52,984 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 11274 transitions. Word has length 41 [2021-02-19 17:16:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:52,984 INFO L480 AbstractCegarLoop]: Abstraction has 4443 states and 11274 transitions. [2021-02-19 17:16:52,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 11274 transitions. [2021-02-19 17:16:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:52,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:52,987 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:53,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:53,195 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash -925274263, now seen corresponding path program 57 times [2021-02-19 17:16:53,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:53,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213358470] [2021-02-19 17:16:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213358470] [2021-02-19 17:16:53,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141158589] [2021-02-19 17:16:53,261 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:53,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:16:53,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:53,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:53,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:53,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 17:16:53,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21246651] [2021-02-19 17:16:53,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:53,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:53,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:53,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:53,364 INFO L87 Difference]: Start difference. First operand 4443 states and 11274 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2021-02-19 17:16:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:53,687 INFO L93 Difference]: Finished difference Result 4967 states and 12253 transitions. [2021-02-19 17:16:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:53,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 41 [2021-02-19 17:16:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:53,693 INFO L225 Difference]: With dead ends: 4967 [2021-02-19 17:16:53,693 INFO L226 Difference]: Without dead ends: 4899 [2021-02-19 17:16:53,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-02-19 17:16:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4406. [2021-02-19 17:16:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 4405 states have (on average 2.53416572077185) internal successors, (11163), 4405 states have internal predecessors, (11163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 11163 transitions. [2021-02-19 17:16:53,746 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 11163 transitions. Word has length 41 [2021-02-19 17:16:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:53,747 INFO L480 AbstractCegarLoop]: Abstraction has 4406 states and 11163 transitions. [2021-02-19 17:16:53,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2021-02-19 17:16:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 11163 transitions. [2021-02-19 17:16:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:53,768 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:53,768 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:53,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-02-19 17:16:53,969 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810443, now seen corresponding path program 58 times [2021-02-19 17:16:53,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:53,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761994063] [2021-02-19 17:16:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:54,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761994063] [2021-02-19 17:16:54,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316203136] [2021-02-19 17:16:54,030 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:54,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:54,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:54,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:54,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:54,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:54,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:16:54,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628691743] [2021-02-19 17:16:54,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:54,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:54,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:54,112 INFO L87 Difference]: Start difference. First operand 4406 states and 11163 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:54,366 INFO L93 Difference]: Finished difference Result 5195 states and 12754 transitions. [2021-02-19 17:16:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:54,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:54,372 INFO L225 Difference]: With dead ends: 5195 [2021-02-19 17:16:54,372 INFO L226 Difference]: Without dead ends: 5147 [2021-02-19 17:16:54,372 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2021-02-19 17:16:54,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 4329. [2021-02-19 17:16:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4329 states, 4328 states have (on average 2.5355822550831792) internal successors, (10974), 4328 states have internal predecessors, (10974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4329 states to 4329 states and 10974 transitions. [2021-02-19 17:16:54,421 INFO L78 Accepts]: Start accepts. Automaton has 4329 states and 10974 transitions. Word has length 41 [2021-02-19 17:16:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:54,421 INFO L480 AbstractCegarLoop]: Abstraction has 4329 states and 10974 transitions. [2021-02-19 17:16:54,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4329 states and 10974 transitions. [2021-02-19 17:16:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:54,424 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:54,424 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:54,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-02-19 17:16:54,624 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:54,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109930, now seen corresponding path program 36 times [2021-02-19 17:16:54,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:54,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350194893] [2021-02-19 17:16:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:54,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350194893] [2021-02-19 17:16:54,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659587790] [2021-02-19 17:16:54,669 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:54,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:16:54,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:54,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:54,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:54,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:54,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-02-19 17:16:54,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509470476] [2021-02-19 17:16:54,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:54,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:54,753 INFO L87 Difference]: Start difference. First operand 4329 states and 10974 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) [2021-02-19 17:16:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:54,898 INFO L93 Difference]: Finished difference Result 5388 states and 13139 transitions. [2021-02-19 17:16:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:54,898 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 41 [2021-02-19 17:16:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:54,903 INFO L225 Difference]: With dead ends: 5388 [2021-02-19 17:16:54,904 INFO L226 Difference]: Without dead ends: 5378 [2021-02-19 17:16:54,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5378 states. [2021-02-19 17:16:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5378 to 4436. [2021-02-19 17:16:54,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 2.537542277339346) internal successors, (11254), 4435 states have internal predecessors, (11254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 11254 transitions. [2021-02-19 17:16:54,953 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 11254 transitions. Word has length 41 [2021-02-19 17:16:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:54,953 INFO L480 AbstractCegarLoop]: Abstraction has 4436 states and 11254 transitions. [2021-02-19 17:16:54,953 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) [2021-02-19 17:16:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 11254 transitions. [2021-02-19 17:16:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:54,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:54,957 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:55,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-02-19 17:16:55,157 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799350, now seen corresponding path program 59 times [2021-02-19 17:16:55,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:55,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764010355] [2021-02-19 17:16:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:55,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764010355] [2021-02-19 17:16:55,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773635529] [2021-02-19 17:16:55,209 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:55,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:16:55,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:55,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:55,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-02-19 17:16:55,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868530283] [2021-02-19 17:16:55,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:16:55,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:16:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:55,324 INFO L87 Difference]: Start difference. First operand 4436 states and 11254 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:55,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:55,486 INFO L93 Difference]: Finished difference Result 5484 states and 13376 transitions. [2021-02-19 17:16:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:55,492 INFO L225 Difference]: With dead ends: 5484 [2021-02-19 17:16:55,492 INFO L226 Difference]: Without dead ends: 5466 [2021-02-19 17:16:55,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-02-19 17:16:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4444. [2021-02-19 17:16:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 2.533423362592843) internal successors, (11256), 4443 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 11256 transitions. [2021-02-19 17:16:55,543 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 11256 transitions. Word has length 41 [2021-02-19 17:16:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:55,543 INFO L480 AbstractCegarLoop]: Abstraction has 4444 states and 11256 transitions. [2021-02-19 17:16:55,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 11256 transitions. [2021-02-19 17:16:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:55,546 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:55,546 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:55,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:55,746 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:55,747 INFO L82 PathProgramCache]: Analyzing trace with hash 603106891, now seen corresponding path program 60 times [2021-02-19 17:16:55,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:55,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248499308] [2021-02-19 17:16:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:55,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248499308] [2021-02-19 17:16:55,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602120528] [2021-02-19 17:16:55,806 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:55,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:16:55,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:55,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:55,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:55,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:16:55,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457815363] [2021-02-19 17:16:55,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:55,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:55,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:55,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:55,901 INFO L87 Difference]: Start difference. First operand 4444 states and 11256 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:56,227 INFO L93 Difference]: Finished difference Result 5908 states and 14304 transitions. [2021-02-19 17:16:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:56,234 INFO L225 Difference]: With dead ends: 5908 [2021-02-19 17:16:56,234 INFO L226 Difference]: Without dead ends: 5866 [2021-02-19 17:16:56,234 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2021-02-19 17:16:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 4459. [2021-02-19 17:16:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4458 states have (on average 2.5345446388515027) internal successors, (11299), 4458 states have internal predecessors, (11299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 11299 transitions. [2021-02-19 17:16:56,291 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 11299 transitions. Word has length 41 [2021-02-19 17:16:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:56,291 INFO L480 AbstractCegarLoop]: Abstraction has 4459 states and 11299 transitions. [2021-02-19 17:16:56,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:56,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 11299 transitions. [2021-02-19 17:16:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:56,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:56,295 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:56,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:56,495 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666000, now seen corresponding path program 61 times [2021-02-19 17:16:56,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:56,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868994432] [2021-02-19 17:16:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868994432] [2021-02-19 17:16:56,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862933940] [2021-02-19 17:16:56,548 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:56,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:56,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:56,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:16:56,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987918500] [2021-02-19 17:16:56,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:56,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:56,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:56,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:56,651 INFO L87 Difference]: Start difference. First operand 4459 states and 11299 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:56,799 INFO L93 Difference]: Finished difference Result 5392 states and 13152 transitions. [2021-02-19 17:16:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:56,805 INFO L225 Difference]: With dead ends: 5392 [2021-02-19 17:16:56,805 INFO L226 Difference]: Without dead ends: 5368 [2021-02-19 17:16:56,805 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2021-02-19 17:16:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 4459. [2021-02-19 17:16:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4458 states have (on average 2.5329744279946165) internal successors, (11292), 4458 states have internal predecessors, (11292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 11292 transitions. [2021-02-19 17:16:56,855 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 11292 transitions. Word has length 41 [2021-02-19 17:16:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:56,855 INFO L480 AbstractCegarLoop]: Abstraction has 4459 states and 11292 transitions. [2021-02-19 17:16:56,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 11292 transitions. [2021-02-19 17:16:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:56,858 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:56,858 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:57,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:57,059 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:57,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:57,059 INFO L82 PathProgramCache]: Analyzing trace with hash 757943425, now seen corresponding path program 62 times [2021-02-19 17:16:57,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:57,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131154416] [2021-02-19 17:16:57,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:57,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131154416] [2021-02-19 17:16:57,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706104620] [2021-02-19 17:16:57,134 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:57,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:57,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:57,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:16:57,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:57,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:57,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:16:57,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949140255] [2021-02-19 17:16:57,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:57,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:57,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:57,215 INFO L87 Difference]: Start difference. First operand 4459 states and 11292 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:57,545 INFO L93 Difference]: Finished difference Result 5882 states and 14163 transitions. [2021-02-19 17:16:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:16:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:57,551 INFO L225 Difference]: With dead ends: 5882 [2021-02-19 17:16:57,551 INFO L226 Difference]: Without dead ends: 5828 [2021-02-19 17:16:57,551 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:16:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-02-19 17:16:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4455. [2021-02-19 17:16:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 4454 states have (on average 2.5280646609788953) internal successors, (11260), 4454 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 11260 transitions. [2021-02-19 17:16:57,606 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 11260 transitions. Word has length 41 [2021-02-19 17:16:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:57,606 INFO L480 AbstractCegarLoop]: Abstraction has 4455 states and 11260 transitions. [2021-02-19 17:16:57,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 11260 transitions. [2021-02-19 17:16:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:57,609 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:57,609 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:57,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-02-19 17:16:57,809 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash -101998502, now seen corresponding path program 37 times [2021-02-19 17:16:57,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:57,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159611317] [2021-02-19 17:16:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:57,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159611317] [2021-02-19 17:16:57,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181628683] [2021-02-19 17:16:57,860 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:57,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:57,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:57,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-02-19 17:16:57,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671216223] [2021-02-19 17:16:57,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:57,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:57,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:57,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:57,955 INFO L87 Difference]: Start difference. First operand 4455 states and 11260 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) [2021-02-19 17:16:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:58,131 INFO L93 Difference]: Finished difference Result 6622 states and 15953 transitions. [2021-02-19 17:16:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:58,132 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 41 [2021-02-19 17:16:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:58,140 INFO L225 Difference]: With dead ends: 6622 [2021-02-19 17:16:58,140 INFO L226 Difference]: Without dead ends: 6622 [2021-02-19 17:16:58,140 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6622 states. [2021-02-19 17:16:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6622 to 4536. [2021-02-19 17:16:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 4535 states have (on average 2.5371554575523705) internal successors, (11506), 4535 states have internal predecessors, (11506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 11506 transitions. [2021-02-19 17:16:58,213 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 11506 transitions. Word has length 41 [2021-02-19 17:16:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:58,213 INFO L480 AbstractCegarLoop]: Abstraction has 4536 states and 11506 transitions. [2021-02-19 17:16:58,213 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) [2021-02-19 17:16:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 11506 transitions. [2021-02-19 17:16:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:58,217 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:58,217 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:58,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:58,418 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:58,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570958, now seen corresponding path program 38 times [2021-02-19 17:16:58,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:58,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337195275] [2021-02-19 17:16:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:58,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337195275] [2021-02-19 17:16:58,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727987620] [2021-02-19 17:16:58,471 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:58,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:58,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:58,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:58,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:16:58,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569952863] [2021-02-19 17:16:58,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:58,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:58,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:58,567 INFO L87 Difference]: Start difference. First operand 4536 states and 11506 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 17:16:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:58,776 INFO L93 Difference]: Finished difference Result 6538 states and 15763 transitions. [2021-02-19 17:16:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 41 [2021-02-19 17:16:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:58,783 INFO L225 Difference]: With dead ends: 6538 [2021-02-19 17:16:58,783 INFO L226 Difference]: Without dead ends: 6538 [2021-02-19 17:16:58,783 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2021-02-19 17:16:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 4548. [2021-02-19 17:16:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.538157026610952) internal successors, (11541), 4547 states have internal predecessors, (11541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 11541 transitions. [2021-02-19 17:16:58,837 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 11541 transitions. Word has length 41 [2021-02-19 17:16:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:58,837 INFO L480 AbstractCegarLoop]: Abstraction has 4548 states and 11541 transitions. [2021-02-19 17:16:58,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 17:16:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 11541 transitions. [2021-02-19 17:16:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:58,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:58,841 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:59,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-02-19 17:16:59,041 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash 865401174, now seen corresponding path program 39 times [2021-02-19 17:16:59,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:59,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861927269] [2021-02-19 17:16:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:59,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861927269] [2021-02-19 17:16:59,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012290211] [2021-02-19 17:16:59,111 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:59,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:16:59,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:59,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:59,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:59,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:59,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:16:59,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046210826] [2021-02-19 17:16:59,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:16:59,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:59,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:16:59,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:59,198 INFO L87 Difference]: Start difference. First operand 4548 states and 11541 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-02-19 17:16:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:59,412 INFO L93 Difference]: Finished difference Result 5919 states and 14307 transitions. [2021-02-19 17:16:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 41 [2021-02-19 17:16:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:59,418 INFO L225 Difference]: With dead ends: 5919 [2021-02-19 17:16:59,418 INFO L226 Difference]: Without dead ends: 5919 [2021-02-19 17:16:59,418 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:59,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-02-19 17:16:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 4381. [2021-02-19 17:16:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 2.534703196347032) internal successors, (11102), 4380 states have internal predecessors, (11102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 11102 transitions. [2021-02-19 17:16:59,481 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 11102 transitions. Word has length 41 [2021-02-19 17:16:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:59,481 INFO L480 AbstractCegarLoop]: Abstraction has 4381 states and 11102 transitions. [2021-02-19 17:16:59,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-02-19 17:16:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 11102 transitions. [2021-02-19 17:16:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:16:59,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:59,484 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:59,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:59,685 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546102, now seen corresponding path program 63 times [2021-02-19 17:16:59,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:59,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065386566] [2021-02-19 17:16:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:59,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065386566] [2021-02-19 17:16:59,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722458799] [2021-02-19 17:16:59,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:59,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:16:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:59,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:59,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:16:59,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357792441] [2021-02-19 17:16:59,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:59,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:59,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:59,842 INFO L87 Difference]: Start difference. First operand 4381 states and 11102 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:00,039 INFO L93 Difference]: Finished difference Result 5144 states and 12650 transitions. [2021-02-19 17:17:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:00,045 INFO L225 Difference]: With dead ends: 5144 [2021-02-19 17:17:00,045 INFO L226 Difference]: Without dead ends: 5117 [2021-02-19 17:17:00,045 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-02-19 17:17:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4381. [2021-02-19 17:17:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 2.5340182648401828) internal successors, (11099), 4380 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 11099 transitions. [2021-02-19 17:17:00,096 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 11099 transitions. Word has length 41 [2021-02-19 17:17:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:00,096 INFO L480 AbstractCegarLoop]: Abstraction has 4381 states and 11099 transitions. [2021-02-19 17:17:00,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 11099 transitions. [2021-02-19 17:17:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:00,100 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:00,100 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:00,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:00,301 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1101286597, now seen corresponding path program 40 times [2021-02-19 17:17:00,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:00,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792356990] [2021-02-19 17:17:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792356990] [2021-02-19 17:17:00,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489941151] [2021-02-19 17:17:00,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:00,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:00,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:00,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:00,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:17:00,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172725036] [2021-02-19 17:17:00,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:00,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:00,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:00,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:00,456 INFO L87 Difference]: Start difference. First operand 4381 states and 11099 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:00,716 INFO L93 Difference]: Finished difference Result 5170 states and 12730 transitions. [2021-02-19 17:17:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:00,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:00,721 INFO L225 Difference]: With dead ends: 5170 [2021-02-19 17:17:00,721 INFO L226 Difference]: Without dead ends: 5153 [2021-02-19 17:17:00,721 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5153 states. [2021-02-19 17:17:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5153 to 4488. [2021-02-19 17:17:00,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 2.529529752618676) internal successors, (11350), 4487 states have internal predecessors, (11350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 11350 transitions. [2021-02-19 17:17:00,773 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 11350 transitions. Word has length 41 [2021-02-19 17:17:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:00,773 INFO L480 AbstractCegarLoop]: Abstraction has 4488 states and 11350 transitions. [2021-02-19 17:17:00,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 11350 transitions. [2021-02-19 17:17:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:00,776 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:00,776 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:00,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-02-19 17:17:00,977 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1693347707, now seen corresponding path program 64 times [2021-02-19 17:17:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:00,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21140324] [2021-02-19 17:17:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:01,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21140324] [2021-02-19 17:17:01,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830494326] [2021-02-19 17:17:01,044 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:01,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:01,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:01,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:01,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:01,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 17:17:01,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995232871] [2021-02-19 17:17:01,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:01,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:01,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:01,143 INFO L87 Difference]: Start difference. First operand 4488 states and 11350 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2021-02-19 17:17:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:01,474 INFO L93 Difference]: Finished difference Result 4951 states and 12203 transitions. [2021-02-19 17:17:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:01,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 41 [2021-02-19 17:17:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:01,479 INFO L225 Difference]: With dead ends: 4951 [2021-02-19 17:17:01,479 INFO L226 Difference]: Without dead ends: 4875 [2021-02-19 17:17:01,479 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2021-02-19 17:17:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4436. [2021-02-19 17:17:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 2.5244644870349493) internal successors, (11196), 4435 states have internal predecessors, (11196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 11196 transitions. [2021-02-19 17:17:01,526 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 11196 transitions. Word has length 41 [2021-02-19 17:17:01,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:01,526 INFO L480 AbstractCegarLoop]: Abstraction has 4436 states and 11196 transitions. [2021-02-19 17:17:01,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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) [2021-02-19 17:17:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 11196 transitions. [2021-02-19 17:17:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:01,529 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:01,529 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:01,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-02-19 17:17:01,730 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:01,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1988083409, now seen corresponding path program 65 times [2021-02-19 17:17:01,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:01,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638340755] [2021-02-19 17:17:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:01,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638340755] [2021-02-19 17:17:01,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812400343] [2021-02-19 17:17:01,791 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:01,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 17:17:01,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:01,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:01,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:17:01,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584763338] [2021-02-19 17:17:01,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:01,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:01,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:01,880 INFO L87 Difference]: Start difference. First operand 4436 states and 11196 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:02,133 INFO L93 Difference]: Finished difference Result 5233 states and 12818 transitions. [2021-02-19 17:17:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:02,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:02,138 INFO L225 Difference]: With dead ends: 5233 [2021-02-19 17:17:02,138 INFO L226 Difference]: Without dead ends: 5188 [2021-02-19 17:17:02,138 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5188 states. [2021-02-19 17:17:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5188 to 4448. [2021-02-19 17:17:02,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 4447 states have (on average 2.5243984708792446) internal successors, (11226), 4447 states have internal predecessors, (11226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 11226 transitions. [2021-02-19 17:17:02,187 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 11226 transitions. Word has length 41 [2021-02-19 17:17:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:02,187 INFO L480 AbstractCegarLoop]: Abstraction has 4448 states and 11226 transitions. [2021-02-19 17:17:02,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 11226 transitions. [2021-02-19 17:17:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:02,190 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:02,190 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:02,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-02-19 17:17:02,398 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:02,398 INFO L82 PathProgramCache]: Analyzing trace with hash 339725906, now seen corresponding path program 66 times [2021-02-19 17:17:02,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:02,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606215202] [2021-02-19 17:17:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:02,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606215202] [2021-02-19 17:17:02,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456277842] [2021-02-19 17:17:02,443 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:02,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:17:02,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:02,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:02,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:02,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:02,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:17:02,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111211351] [2021-02-19 17:17:02,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:02,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:02,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:02,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:02,527 INFO L87 Difference]: Start difference. First operand 4448 states and 11226 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:02,651 INFO L93 Difference]: Finished difference Result 5463 states and 13252 transitions. [2021-02-19 17:17:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:17:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:02,656 INFO L225 Difference]: With dead ends: 5463 [2021-02-19 17:17:02,656 INFO L226 Difference]: Without dead ends: 5445 [2021-02-19 17:17:02,656 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-02-19 17:17:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 4426. [2021-02-19 17:17:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 2.5218079096045196) internal successors, (11159), 4425 states have internal predecessors, (11159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 11159 transitions. [2021-02-19 17:17:02,708 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 11159 transitions. Word has length 41 [2021-02-19 17:17:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:02,708 INFO L480 AbstractCegarLoop]: Abstraction has 4426 states and 11159 transitions. [2021-02-19 17:17:02,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 11159 transitions. [2021-02-19 17:17:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:02,711 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:02,712 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:02,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:02,912 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash -164966553, now seen corresponding path program 67 times [2021-02-19 17:17:02,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:02,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294738373] [2021-02-19 17:17:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:02,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294738373] [2021-02-19 17:17:02,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305109357] [2021-02-19 17:17:02,970 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:03,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:03,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:17:03,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451988017] [2021-02-19 17:17:03,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:03,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:03,069 INFO L87 Difference]: Start difference. First operand 4426 states and 11159 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:03,415 INFO L93 Difference]: Finished difference Result 6191 states and 14900 transitions. [2021-02-19 17:17:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:17:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:03,421 INFO L225 Difference]: With dead ends: 6191 [2021-02-19 17:17:03,421 INFO L226 Difference]: Without dead ends: 6137 [2021-02-19 17:17:03,421 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2021-02-19 17:17:03,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 4522. [2021-02-19 17:17:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 2.5255474452554743) internal successors, (11418), 4521 states have internal predecessors, (11418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 11418 transitions. [2021-02-19 17:17:03,474 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 11418 transitions. Word has length 41 [2021-02-19 17:17:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:03,474 INFO L480 AbstractCegarLoop]: Abstraction has 4522 states and 11418 transitions. [2021-02-19 17:17:03,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 11418 transitions. [2021-02-19 17:17:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:03,477 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:03,477 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:03,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:03,678 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1367592556, now seen corresponding path program 68 times [2021-02-19 17:17:03,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:03,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450297471] [2021-02-19 17:17:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:03,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450297471] [2021-02-19 17:17:03,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987474925] [2021-02-19 17:17:03,744 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:03,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:03,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:03,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:03,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:03,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:03,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:17:03,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525511985] [2021-02-19 17:17:03,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:03,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:03,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:03,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:03,826 INFO L87 Difference]: Start difference. First operand 4522 states and 11418 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:03,961 INFO L93 Difference]: Finished difference Result 5612 states and 13602 transitions. [2021-02-19 17:17:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:17:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:03,966 INFO L225 Difference]: With dead ends: 5612 [2021-02-19 17:17:03,966 INFO L226 Difference]: Without dead ends: 5588 [2021-02-19 17:17:03,967 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2021-02-19 17:17:04,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 4522. [2021-02-19 17:17:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 2.5233355452333552) internal successors, (11408), 4521 states have internal predecessors, (11408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 11408 transitions. [2021-02-19 17:17:04,017 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 11408 transitions. Word has length 41 [2021-02-19 17:17:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:04,018 INFO L480 AbstractCegarLoop]: Abstraction has 4522 states and 11408 transitions. [2021-02-19 17:17:04,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 11408 transitions. [2021-02-19 17:17:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:04,021 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:04,021 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:04,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:04,221 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:04,221 INFO L82 PathProgramCache]: Analyzing trace with hash -10130019, now seen corresponding path program 69 times [2021-02-19 17:17:04,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:04,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874724623] [2021-02-19 17:17:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:04,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874724623] [2021-02-19 17:17:04,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968856941] [2021-02-19 17:17:04,291 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:04,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:17:04,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:04,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:04,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:04,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:17:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572273574] [2021-02-19 17:17:04,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:04,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:04,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:04,381 INFO L87 Difference]: Start difference. First operand 4522 states and 11408 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:04,935 INFO L93 Difference]: Finished difference Result 7541 states and 17918 transitions. [2021-02-19 17:17:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:17:04,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:04,943 INFO L225 Difference]: With dead ends: 7541 [2021-02-19 17:17:04,943 INFO L226 Difference]: Without dead ends: 7427 [2021-02-19 17:17:04,943 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:17:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7427 states. [2021-02-19 17:17:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7427 to 4631. [2021-02-19 17:17:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 2.5280777537796975) internal successors, (11705), 4630 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 11705 transitions. [2021-02-19 17:17:05,006 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 11705 transitions. Word has length 41 [2021-02-19 17:17:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:05,006 INFO L480 AbstractCegarLoop]: Abstraction has 4631 states and 11705 transitions. [2021-02-19 17:17:05,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 11705 transitions. [2021-02-19 17:17:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:05,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:05,009 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:05,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-02-19 17:17:05,210 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:05,210 INFO L82 PathProgramCache]: Analyzing trace with hash 376472658, now seen corresponding path program 70 times [2021-02-19 17:17:05,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:05,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965473979] [2021-02-19 17:17:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965473979] [2021-02-19 17:17:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872427283] [2021-02-19 17:17:05,274 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:05,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:05,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:05,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:05,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:05,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:05,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:17:05,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58343538] [2021-02-19 17:17:05,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:05,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:05,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:05,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:05,373 INFO L87 Difference]: Start difference. First operand 4631 states and 11705 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:05,523 INFO L93 Difference]: Finished difference Result 5778 states and 13994 transitions. [2021-02-19 17:17:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:05,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:05,529 INFO L225 Difference]: With dead ends: 5778 [2021-02-19 17:17:05,529 INFO L226 Difference]: Without dead ends: 5745 [2021-02-19 17:17:05,529 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:05,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-02-19 17:17:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 4501. [2021-02-19 17:17:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.518) internal successors, (11331), 4500 states have internal predecessors, (11331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11331 transitions. [2021-02-19 17:17:05,579 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11331 transitions. Word has length 41 [2021-02-19 17:17:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:05,579 INFO L480 AbstractCegarLoop]: Abstraction has 4501 states and 11331 transitions. [2021-02-19 17:17:05,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11331 transitions. [2021-02-19 17:17:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:05,585 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:05,585 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:05,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-02-19 17:17:05,798 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:05,798 INFO L82 PathProgramCache]: Analyzing trace with hash -69821529, now seen corresponding path program 71 times [2021-02-19 17:17:05,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:05,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552916884] [2021-02-19 17:17:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:05,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552916884] [2021-02-19 17:17:05,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784132201] [2021-02-19 17:17:05,875 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:05,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:17:05,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:05,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:05,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:17:05,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170906030] [2021-02-19 17:17:05,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:17:05,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:05,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:17:05,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:05,961 INFO L87 Difference]: Start difference. First operand 4501 states and 11331 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:06,342 INFO L93 Difference]: Finished difference Result 6725 states and 15932 transitions. [2021-02-19 17:17:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:17:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:06,350 INFO L225 Difference]: With dead ends: 6725 [2021-02-19 17:17:06,351 INFO L226 Difference]: Without dead ends: 6569 [2021-02-19 17:17:06,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-02-19 17:17:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 4248. [2021-02-19 17:17:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.5038850953614316) internal successors, (10634), 4247 states have internal predecessors, (10634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 10634 transitions. [2021-02-19 17:17:06,429 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 10634 transitions. Word has length 41 [2021-02-19 17:17:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:06,429 INFO L480 AbstractCegarLoop]: Abstraction has 4248 states and 10634 transitions. [2021-02-19 17:17:06,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 10634 transitions. [2021-02-19 17:17:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:06,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:06,433 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:06,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:06,633 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash -307883046, now seen corresponding path program 41 times [2021-02-19 17:17:06,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:06,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623441188] [2021-02-19 17:17:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:06,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623441188] [2021-02-19 17:17:06,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224793922] [2021-02-19 17:17:06,681 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:06,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 17:17:06,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:06,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:06,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-02-19 17:17:06,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499901635] [2021-02-19 17:17:06,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:06,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:06,784 INFO L87 Difference]: Start difference. First operand 4248 states and 10634 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:06,931 INFO L93 Difference]: Finished difference Result 5485 states and 13223 transitions. [2021-02-19 17:17:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:06,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:06,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:06,936 INFO L225 Difference]: With dead ends: 5485 [2021-02-19 17:17:06,936 INFO L226 Difference]: Without dead ends: 5471 [2021-02-19 17:17:06,936 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-02-19 17:17:06,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 4359. [2021-02-19 17:17:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 2.5094079853143643) internal successors, (10936), 4358 states have internal predecessors, (10936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 10936 transitions. [2021-02-19 17:17:06,987 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 10936 transitions. Word has length 41 [2021-02-19 17:17:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:06,987 INFO L480 AbstractCegarLoop]: Abstraction has 4359 states and 10936 transitions. [2021-02-19 17:17:06,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 10936 transitions. [2021-02-19 17:17:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:06,990 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:06,990 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:07,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:07,190 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:07,190 INFO L82 PathProgramCache]: Analyzing trace with hash -929763456, now seen corresponding path program 42 times [2021-02-19 17:17:07,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:07,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404059226] [2021-02-19 17:17:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:07,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404059226] [2021-02-19 17:17:07,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434076979] [2021-02-19 17:17:07,234 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:07,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 17:17:07,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:17:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:07,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:07,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-02-19 17:17:07,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035761914] [2021-02-19 17:17:07,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:07,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:07,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:07,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:07,348 INFO L87 Difference]: Start difference. First operand 4359 states and 10936 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:07,575 INFO L93 Difference]: Finished difference Result 5470 states and 13116 transitions. [2021-02-19 17:17:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:07,580 INFO L225 Difference]: With dead ends: 5470 [2021-02-19 17:17:07,580 INFO L226 Difference]: Without dead ends: 5470 [2021-02-19 17:17:07,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:17:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2021-02-19 17:17:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 4095. [2021-02-19 17:17:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4095 states, 4094 states have (on average 2.5073277967757694) internal successors, (10265), 4094 states have internal predecessors, (10265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4095 states to 4095 states and 10265 transitions. [2021-02-19 17:17:07,624 INFO L78 Accepts]: Start accepts. Automaton has 4095 states and 10265 transitions. Word has length 41 [2021-02-19 17:17:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:07,624 INFO L480 AbstractCegarLoop]: Abstraction has 4095 states and 10265 transitions. [2021-02-19 17:17:07,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4095 states and 10265 transitions. [2021-02-19 17:17:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:07,627 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:07,627 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:07,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:07,827 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1823751340, now seen corresponding path program 72 times [2021-02-19 17:17:07,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:07,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038081113] [2021-02-19 17:17:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:07,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038081113] [2021-02-19 17:17:07,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502621401] [2021-02-19 17:17:07,901 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:07,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:17:07,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:07,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:07,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:07,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:17:07,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959901773] [2021-02-19 17:17:07,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:17:07,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:07,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:17:07,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:07,999 INFO L87 Difference]: Start difference. First operand 4095 states and 10265 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:08,171 INFO L93 Difference]: Finished difference Result 4978 states and 12069 transitions. [2021-02-19 17:17:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:08,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:08,176 INFO L225 Difference]: With dead ends: 4978 [2021-02-19 17:17:08,176 INFO L226 Difference]: Without dead ends: 4942 [2021-02-19 17:17:08,176 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:17:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-02-19 17:17:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4104. [2021-02-19 17:17:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 2.5047526200341212) internal successors, (10277), 4103 states have internal predecessors, (10277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 10277 transitions. [2021-02-19 17:17:08,227 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 10277 transitions. Word has length 41 [2021-02-19 17:17:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:08,228 INFO L480 AbstractCegarLoop]: Abstraction has 4104 states and 10277 transitions. [2021-02-19 17:17:08,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 10277 transitions. [2021-02-19 17:17:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:08,230 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:08,230 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:08,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-02-19 17:17:08,431 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1062684865, now seen corresponding path program 43 times [2021-02-19 17:17:08,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:08,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375656351] [2021-02-19 17:17:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375656351] [2021-02-19 17:17:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178403796] [2021-02-19 17:17:08,509 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:08,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:08,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:08,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:17:08,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386113175] [2021-02-19 17:17:08,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:17:08,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:08,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:17:08,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:08,590 INFO L87 Difference]: Start difference. First operand 4104 states and 10277 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:08,950 INFO L93 Difference]: Finished difference Result 5531 states and 13423 transitions. [2021-02-19 17:17:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:17:08,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:08,956 INFO L225 Difference]: With dead ends: 5531 [2021-02-19 17:17:08,956 INFO L226 Difference]: Without dead ends: 5501 [2021-02-19 17:17:08,956 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-02-19 17:17:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4233. [2021-02-19 17:17:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 2.508506616257089) internal successors, (10616), 4232 states have internal predecessors, (10616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 10616 transitions. [2021-02-19 17:17:09,001 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 10616 transitions. Word has length 41 [2021-02-19 17:17:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:09,001 INFO L480 AbstractCegarLoop]: Abstraction has 4233 states and 10616 transitions. [2021-02-19 17:17:09,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 10616 transitions. [2021-02-19 17:17:09,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:09,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:09,004 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:09,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:09,205 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:09,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash 237090805, now seen corresponding path program 73 times [2021-02-19 17:17:09,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:09,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561386050] [2021-02-19 17:17:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:09,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561386050] [2021-02-19 17:17:09,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879213094] [2021-02-19 17:17:09,281 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:09,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:09,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:09,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 17:17:09,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594746723] [2021-02-19 17:17:09,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:17:09,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:17:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:09,426 INFO L87 Difference]: Start difference. First operand 4233 states and 10616 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:17:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:09,757 INFO L93 Difference]: Finished difference Result 4488 states and 11071 transitions. [2021-02-19 17:17:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:09,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 41 [2021-02-19 17:17:09,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:09,761 INFO L225 Difference]: With dead ends: 4488 [2021-02-19 17:17:09,761 INFO L226 Difference]: Without dead ends: 4400 [2021-02-19 17:17:09,761 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:17:09,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-02-19 17:17:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 4224. [2021-02-19 17:17:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4223 states have (on average 2.505564764385508) internal successors, (10581), 4223 states have internal predecessors, (10581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 10581 transitions. [2021-02-19 17:17:09,804 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 10581 transitions. Word has length 41 [2021-02-19 17:17:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:09,804 INFO L480 AbstractCegarLoop]: Abstraction has 4224 states and 10581 transitions. [2021-02-19 17:17:09,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:17:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 10581 transitions. [2021-02-19 17:17:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:09,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:09,807 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:10,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:10,007 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:10,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1009794922, now seen corresponding path program 74 times [2021-02-19 17:17:10,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:10,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543638599] [2021-02-19 17:17:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:10,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543638599] [2021-02-19 17:17:10,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315758583] [2021-02-19 17:17:10,073 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:10,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:10,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:10,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:17:10,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202963922] [2021-02-19 17:17:10,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:10,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:10,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:10,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:10,176 INFO L87 Difference]: Start difference. First operand 4224 states and 10581 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:10,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:10,372 INFO L93 Difference]: Finished difference Result 5631 states and 13883 transitions. [2021-02-19 17:17:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:10,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:10,379 INFO L225 Difference]: With dead ends: 5631 [2021-02-19 17:17:10,379 INFO L226 Difference]: Without dead ends: 5631 [2021-02-19 17:17:10,379 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:17:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-02-19 17:17:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 4503. [2021-02-19 17:17:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 2.540648600621946) internal successors, (11438), 4502 states have internal predecessors, (11438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 11438 transitions. [2021-02-19 17:17:10,439 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 11438 transitions. Word has length 41 [2021-02-19 17:17:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:10,439 INFO L480 AbstractCegarLoop]: Abstraction has 4503 states and 11438 transitions. [2021-02-19 17:17:10,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 11438 transitions. [2021-02-19 17:17:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:10,443 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:10,443 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:10,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:10,643 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:10,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1038909225, now seen corresponding path program 44 times [2021-02-19 17:17:10,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:10,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758731914] [2021-02-19 17:17:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:10,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758731914] [2021-02-19 17:17:10,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467876300] [2021-02-19 17:17:10,713 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:10,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:10,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:10,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:10,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:17:10,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165408830] [2021-02-19 17:17:10,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:10,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:10,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:10,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:10,819 INFO L87 Difference]: Start difference. First operand 4503 states and 11438 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:11,139 INFO L93 Difference]: Finished difference Result 5644 states and 13966 transitions. [2021-02-19 17:17:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:11,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:11,145 INFO L225 Difference]: With dead ends: 5644 [2021-02-19 17:17:11,145 INFO L226 Difference]: Without dead ends: 5644 [2021-02-19 17:17:11,145 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:17:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2021-02-19 17:17:11,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 4551. [2021-02-19 17:17:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4551 states, 4550 states have (on average 2.545714285714286) internal successors, (11583), 4550 states have internal predecessors, (11583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4551 states to 4551 states and 11583 transitions. [2021-02-19 17:17:11,196 INFO L78 Accepts]: Start accepts. Automaton has 4551 states and 11583 transitions. Word has length 41 [2021-02-19 17:17:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:11,196 INFO L480 AbstractCegarLoop]: Abstraction has 4551 states and 11583 transitions. [2021-02-19 17:17:11,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4551 states and 11583 transitions. [2021-02-19 17:17:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:11,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:11,199 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:11,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-02-19 17:17:11,399 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1464770613, now seen corresponding path program 75 times [2021-02-19 17:17:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:11,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045962051] [2021-02-19 17:17:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:11,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045962051] [2021-02-19 17:17:11,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724363060] [2021-02-19 17:17:11,466 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:11,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:17:11,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:11,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:11,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:11,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:11,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 17:17:11,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853432468] [2021-02-19 17:17:11,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:11,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:11,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:11,589 INFO L87 Difference]: Start difference. First operand 4551 states and 11583 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:11,889 INFO L93 Difference]: Finished difference Result 4818 states and 12047 transitions. [2021-02-19 17:17:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:11,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:11,893 INFO L225 Difference]: With dead ends: 4818 [2021-02-19 17:17:11,893 INFO L226 Difference]: Without dead ends: 4766 [2021-02-19 17:17:11,894 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-02-19 17:17:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 4542. [2021-02-19 17:17:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 4541 states have (on average 2.5445937018277913) internal successors, (11555), 4541 states have internal predecessors, (11555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 11555 transitions. [2021-02-19 17:17:11,936 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 11555 transitions. Word has length 41 [2021-02-19 17:17:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:11,936 INFO L480 AbstractCegarLoop]: Abstraction has 4542 states and 11555 transitions. [2021-02-19 17:17:11,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 11555 transitions. [2021-02-19 17:17:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:11,939 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:11,939 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:12,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-02-19 17:17:12,139 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:12,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1554389078, now seen corresponding path program 45 times [2021-02-19 17:17:12,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:12,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419975871] [2021-02-19 17:17:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:12,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419975871] [2021-02-19 17:17:12,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670021130] [2021-02-19 17:17:12,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:12,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:17:12,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:12,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:12,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:12,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:12,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:17:12,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110962836] [2021-02-19 17:17:12,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:17:12,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:12,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:17:12,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:12,290 INFO L87 Difference]: Start difference. First operand 4542 states and 11555 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:12,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:12,451 INFO L93 Difference]: Finished difference Result 5367 states and 13217 transitions. [2021-02-19 17:17:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:12,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:12,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:12,456 INFO L225 Difference]: With dead ends: 5367 [2021-02-19 17:17:12,456 INFO L226 Difference]: Without dead ends: 5339 [2021-02-19 17:17:12,457 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-02-19 17:17:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 4476. [2021-02-19 17:17:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4475 states have (on average 2.5512849162011175) internal successors, (11417), 4475 states have internal predecessors, (11417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 11417 transitions. [2021-02-19 17:17:12,505 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 11417 transitions. Word has length 41 [2021-02-19 17:17:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:12,505 INFO L480 AbstractCegarLoop]: Abstraction has 4476 states and 11417 transitions. [2021-02-19 17:17:12,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 11417 transitions. [2021-02-19 17:17:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:12,508 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:12,508 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:12,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-02-19 17:17:12,716 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:12,716 INFO L82 PathProgramCache]: Analyzing trace with hash -692902252, now seen corresponding path program 76 times [2021-02-19 17:17:12,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:12,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934837555] [2021-02-19 17:17:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:12,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934837555] [2021-02-19 17:17:12,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186262323] [2021-02-19 17:17:12,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:12,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:12,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:12,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:12,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:17:12,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846982387] [2021-02-19 17:17:12,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:12,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:12,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:12,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:12,859 INFO L87 Difference]: Start difference. First operand 4476 states and 11417 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:13,020 INFO L93 Difference]: Finished difference Result 5879 states and 14580 transitions. [2021-02-19 17:17:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:17:13,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:13,027 INFO L225 Difference]: With dead ends: 5879 [2021-02-19 17:17:13,027 INFO L226 Difference]: Without dead ends: 5879 [2021-02-19 17:17:13,027 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5879 states. [2021-02-19 17:17:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5879 to 4655. [2021-02-19 17:17:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.5717662226042113) internal successors, (11969), 4654 states have internal predecessors, (11969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 11969 transitions. [2021-02-19 17:17:13,081 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 11969 transitions. Word has length 41 [2021-02-19 17:17:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:13,081 INFO L480 AbstractCegarLoop]: Abstraction has 4655 states and 11969 transitions. [2021-02-19 17:17:13,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 11969 transitions. [2021-02-19 17:17:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:13,085 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:13,085 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:13,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-02-19 17:17:13,287 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:13,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1463737919, now seen corresponding path program 46 times [2021-02-19 17:17:13,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:13,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460048619] [2021-02-19 17:17:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:13,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460048619] [2021-02-19 17:17:13,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968600072] [2021-02-19 17:17:13,347 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:13,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:13,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:13,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:13,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:13,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:13,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:17:13,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10803816] [2021-02-19 17:17:13,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:13,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:13,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:13,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:13,433 INFO L87 Difference]: Start difference. First operand 4655 states and 11969 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:13,732 INFO L93 Difference]: Finished difference Result 5328 states and 13423 transitions. [2021-02-19 17:17:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:17:13,732 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:13,738 INFO L225 Difference]: With dead ends: 5328 [2021-02-19 17:17:13,738 INFO L226 Difference]: Without dead ends: 5324 [2021-02-19 17:17:13,738 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:17:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2021-02-19 17:17:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 4667. [2021-02-19 17:17:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.5720102871838835) internal successors, (12001), 4666 states have internal predecessors, (12001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 12001 transitions. [2021-02-19 17:17:13,790 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 12001 transitions. Word has length 41 [2021-02-19 17:17:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:13,790 INFO L480 AbstractCegarLoop]: Abstraction has 4667 states and 12001 transitions. [2021-02-19 17:17:13,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 12001 transitions. [2021-02-19 17:17:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:13,793 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:13,793 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:13,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:13,993 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1197932993, now seen corresponding path program 77 times [2021-02-19 17:17:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:13,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068396102] [2021-02-19 17:17:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:14,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068396102] [2021-02-19 17:17:14,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352564048] [2021-02-19 17:17:14,060 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:14,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:17:14,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:14,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:14,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:14,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:14,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 17:17:14,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391476072] [2021-02-19 17:17:14,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:14,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:14,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:14,190 INFO L87 Difference]: Start difference. First operand 4667 states and 12001 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:14,436 INFO L93 Difference]: Finished difference Result 4707 states and 12061 transitions. [2021-02-19 17:17:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:17:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:14,442 INFO L225 Difference]: With dead ends: 4707 [2021-02-19 17:17:14,442 INFO L226 Difference]: Without dead ends: 4684 [2021-02-19 17:17:14,443 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-02-19 17:17:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4658. [2021-02-19 17:17:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.5720420871805882) internal successors, (11978), 4657 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 11978 transitions. [2021-02-19 17:17:14,502 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 11978 transitions. Word has length 41 [2021-02-19 17:17:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:14,502 INFO L480 AbstractCegarLoop]: Abstraction has 4658 states and 11978 transitions. [2021-02-19 17:17:14,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 11978 transitions. [2021-02-19 17:17:14,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:14,506 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:14,506 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:14,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:14,722 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1045836298, now seen corresponding path program 78 times [2021-02-19 17:17:14,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:14,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616351468] [2021-02-19 17:17:14,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:14,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616351468] [2021-02-19 17:17:14,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932274157] [2021-02-19 17:17:14,770 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:14,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:17:14,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:14,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:14,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:17:14,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752668640] [2021-02-19 17:17:14,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:14,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:14,856 INFO L87 Difference]: Start difference. First operand 4658 states and 11978 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:14,989 INFO L93 Difference]: Finished difference Result 6326 states and 15675 transitions. [2021-02-19 17:17:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:17:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:14,996 INFO L225 Difference]: With dead ends: 6326 [2021-02-19 17:17:14,996 INFO L226 Difference]: Without dead ends: 6326 [2021-02-19 17:17:14,996 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6326 states. [2021-02-19 17:17:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6326 to 4917. [2021-02-19 17:17:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4917 states, 4916 states have (on average 2.5939788445890968) internal successors, (12752), 4916 states have internal predecessors, (12752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4917 states to 4917 states and 12752 transitions. [2021-02-19 17:17:15,061 INFO L78 Accepts]: Start accepts. Automaton has 4917 states and 12752 transitions. Word has length 41 [2021-02-19 17:17:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:15,061 INFO L480 AbstractCegarLoop]: Abstraction has 4917 states and 12752 transitions. [2021-02-19 17:17:15,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4917 states and 12752 transitions. [2021-02-19 17:17:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:15,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:15,064 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:15,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-02-19 17:17:15,265 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1283897815, now seen corresponding path program 47 times [2021-02-19 17:17:15,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:15,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442820316] [2021-02-19 17:17:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:15,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442820316] [2021-02-19 17:17:15,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834743027] [2021-02-19 17:17:15,328 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:15,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:17:15,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:15,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:15,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:15,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:17:15,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900741803] [2021-02-19 17:17:15,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:15,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:15,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:15,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:15,432 INFO L87 Difference]: Start difference. First operand 4917 states and 12752 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:15,704 INFO L93 Difference]: Finished difference Result 6100 states and 15293 transitions. [2021-02-19 17:17:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:15,711 INFO L225 Difference]: With dead ends: 6100 [2021-02-19 17:17:15,711 INFO L226 Difference]: Without dead ends: 6059 [2021-02-19 17:17:15,711 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-02-19 17:17:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 5266. [2021-02-19 17:17:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5266 states, 5265 states have (on average 2.5753086419753086) internal successors, (13559), 5265 states have internal predecessors, (13559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5266 states to 5266 states and 13559 transitions. [2021-02-19 17:17:15,773 INFO L78 Accepts]: Start accepts. Automaton has 5266 states and 13559 transitions. Word has length 41 [2021-02-19 17:17:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:15,773 INFO L480 AbstractCegarLoop]: Abstraction has 5266 states and 13559 transitions. [2021-02-19 17:17:15,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 5266 states and 13559 transitions. [2021-02-19 17:17:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:15,777 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:15,777 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:15,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:15,977 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1457372624, now seen corresponding path program 79 times [2021-02-19 17:17:15,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:15,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894901671] [2021-02-19 17:17:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:16,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894901671] [2021-02-19 17:17:16,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685992021] [2021-02-19 17:17:16,024 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:16,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:16,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:16,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:17:16,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041125759] [2021-02-19 17:17:16,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:16,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:16,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:16,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:16,105 INFO L87 Difference]: Start difference. First operand 5266 states and 13559 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:16,230 INFO L93 Difference]: Finished difference Result 6555 states and 16173 transitions. [2021-02-19 17:17:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:17:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:16,238 INFO L225 Difference]: With dead ends: 6555 [2021-02-19 17:17:16,238 INFO L226 Difference]: Without dead ends: 6552 [2021-02-19 17:17:16,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-02-19 17:17:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5265. [2021-02-19 17:17:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5265 states, 5264 states have (on average 2.574658054711246) internal successors, (13553), 5264 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 13553 transitions. [2021-02-19 17:17:16,307 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 13553 transitions. Word has length 41 [2021-02-19 17:17:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:16,307 INFO L480 AbstractCegarLoop]: Abstraction has 5265 states and 13553 transitions. [2021-02-19 17:17:16,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 13553 transitions. [2021-02-19 17:17:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:16,311 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:16,311 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:16,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:16,511 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1664435190, now seen corresponding path program 80 times [2021-02-19 17:17:16,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:16,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088736012] [2021-02-19 17:17:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:16,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088736012] [2021-02-19 17:17:16,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407043455] [2021-02-19 17:17:16,561 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:16,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:16,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:16,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:16,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:16,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:17:16,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518171587] [2021-02-19 17:17:16,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:16,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:16,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:16,652 INFO L87 Difference]: Start difference. First operand 5265 states and 13553 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:16,765 INFO L93 Difference]: Finished difference Result 6425 states and 16009 transitions. [2021-02-19 17:17:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:17:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:16,773 INFO L225 Difference]: With dead ends: 6425 [2021-02-19 17:17:16,773 INFO L226 Difference]: Without dead ends: 6413 [2021-02-19 17:17:16,773 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6413 states. [2021-02-19 17:17:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6413 to 5265. [2021-02-19 17:17:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5265 states, 5264 states have (on average 2.573518237082067) internal successors, (13547), 5264 states have internal predecessors, (13547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 13547 transitions. [2021-02-19 17:17:16,863 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 13547 transitions. Word has length 41 [2021-02-19 17:17:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:16,863 INFO L480 AbstractCegarLoop]: Abstraction has 5265 states and 13547 transitions. [2021-02-19 17:17:16,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 13547 transitions. [2021-02-19 17:17:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:16,867 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:16,867 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:17,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-02-19 17:17:17,068 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:17,068 INFO L82 PathProgramCache]: Analyzing trace with hash 216435177, now seen corresponding path program 81 times [2021-02-19 17:17:17,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:17,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365280453] [2021-02-19 17:17:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:17,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365280453] [2021-02-19 17:17:17,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225758783] [2021-02-19 17:17:17,132 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:17,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:17:17,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:17,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:17,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 17:17:17,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136209217] [2021-02-19 17:17:17,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:17,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:17,258 INFO L87 Difference]: Start difference. First operand 5265 states and 13547 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:17,623 INFO L93 Difference]: Finished difference Result 5717 states and 14382 transitions. [2021-02-19 17:17:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:17,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:17,629 INFO L225 Difference]: With dead ends: 5717 [2021-02-19 17:17:17,629 INFO L226 Difference]: Without dead ends: 5612 [2021-02-19 17:17:17,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5612 states. [2021-02-19 17:17:17,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5612 to 5100. [2021-02-19 17:17:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5100 states, 5099 states have (on average 2.5777603451657187) internal successors, (13144), 5099 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 13144 transitions. [2021-02-19 17:17:17,687 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 13144 transitions. Word has length 41 [2021-02-19 17:17:17,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:17,687 INFO L480 AbstractCegarLoop]: Abstraction has 5100 states and 13144 transitions. [2021-02-19 17:17:17,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 13144 transitions. [2021-02-19 17:17:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:17,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:17,690 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:17,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:17,898 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:17,898 INFO L82 PathProgramCache]: Analyzing trace with hash -554400490, now seen corresponding path program 48 times [2021-02-19 17:17:17,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:17,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409400718] [2021-02-19 17:17:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:17,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409400718] [2021-02-19 17:17:17,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877669463] [2021-02-19 17:17:17,947 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:17,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:17:17,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:17,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:17,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:18,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:18,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 13 [2021-02-19 17:17:18,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701406228] [2021-02-19 17:17:18,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:17:18,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:18,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:17:18,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:17:18,054 INFO L87 Difference]: Start difference. First operand 5100 states and 13144 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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) [2021-02-19 17:17:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:18,249 INFO L93 Difference]: Finished difference Result 6069 states and 15200 transitions. [2021-02-19 17:17:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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 41 [2021-02-19 17:17:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:18,255 INFO L225 Difference]: With dead ends: 6069 [2021-02-19 17:17:18,255 INFO L226 Difference]: Without dead ends: 6059 [2021-02-19 17:17:18,256 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:17:18,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-02-19 17:17:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 5342. [2021-02-19 17:17:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 5341 states have (on average 2.578543343943082) internal successors, (13772), 5341 states have internal predecessors, (13772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 13772 transitions. [2021-02-19 17:17:18,318 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 13772 transitions. Word has length 41 [2021-02-19 17:17:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:18,318 INFO L480 AbstractCegarLoop]: Abstraction has 5342 states and 13772 transitions. [2021-02-19 17:17:18,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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) [2021-02-19 17:17:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 13772 transitions. [2021-02-19 17:17:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:18,321 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:18,321 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:18,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-02-19 17:17:18,521 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:18,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1017591856, now seen corresponding path program 82 times [2021-02-19 17:17:18,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:18,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945343301] [2021-02-19 17:17:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:18,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945343301] [2021-02-19 17:17:18,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100658828] [2021-02-19 17:17:18,577 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:18,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:18,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:18,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:18,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:18,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:18,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:17:18,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908909404] [2021-02-19 17:17:18,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:18,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:18,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:18,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:18,658 INFO L87 Difference]: Start difference. First operand 5342 states and 13772 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:18,766 INFO L93 Difference]: Finished difference Result 6498 states and 16204 transitions. [2021-02-19 17:17:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:17:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:18,774 INFO L225 Difference]: With dead ends: 6498 [2021-02-19 17:17:18,774 INFO L226 Difference]: Without dead ends: 6480 [2021-02-19 17:17:18,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-02-19 17:17:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5432. [2021-02-19 17:17:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 2.5871846805376544) internal successors, (14051), 5431 states have internal predecessors, (14051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 14051 transitions. [2021-02-19 17:17:18,862 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 14051 transitions. Word has length 41 [2021-02-19 17:17:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:18,862 INFO L480 AbstractCegarLoop]: Abstraction has 5432 states and 14051 transitions. [2021-02-19 17:17:18,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 14051 transitions. [2021-02-19 17:17:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:18,865 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:18,865 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:19,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:19,066 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:19,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2008711754, now seen corresponding path program 83 times [2021-02-19 17:17:19,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:19,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136445376] [2021-02-19 17:17:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:19,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136445376] [2021-02-19 17:17:19,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990151286] [2021-02-19 17:17:19,139 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:19,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:17:19,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:19,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:19,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:19,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:19,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-02-19 17:17:19,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611952399] [2021-02-19 17:17:19,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:17:19,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:17:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:19,244 INFO L87 Difference]: Start difference. First operand 5432 states and 14051 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:19,419 INFO L93 Difference]: Finished difference Result 6652 states and 16506 transitions. [2021-02-19 17:17:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:19,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:19,427 INFO L225 Difference]: With dead ends: 6652 [2021-02-19 17:17:19,428 INFO L226 Difference]: Without dead ends: 6625 [2021-02-19 17:17:19,428 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:17:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6625 states. [2021-02-19 17:17:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6625 to 5432. [2021-02-19 17:17:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 2.5866322960780703) internal successors, (14048), 5431 states have internal predecessors, (14048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 14048 transitions. [2021-02-19 17:17:19,501 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 14048 transitions. Word has length 41 [2021-02-19 17:17:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:19,501 INFO L480 AbstractCegarLoop]: Abstraction has 5432 states and 14048 transitions. [2021-02-19 17:17:19,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 14048 transitions. [2021-02-19 17:17:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:19,505 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:19,505 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:19,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-02-19 17:17:19,706 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:19,706 INFO L82 PathProgramCache]: Analyzing trace with hash -561433072, now seen corresponding path program 84 times [2021-02-19 17:17:19,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:19,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295519586] [2021-02-19 17:17:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:19,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295519586] [2021-02-19 17:17:19,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228187443] [2021-02-19 17:17:19,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:19,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:17:19,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:19,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:19,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:19,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:19,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:17:19,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773388211] [2021-02-19 17:17:19,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:17:19,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:19,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:17:19,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:19,886 INFO L87 Difference]: Start difference. First operand 5432 states and 14048 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:20,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:20,048 INFO L93 Difference]: Finished difference Result 6669 states and 16503 transitions. [2021-02-19 17:17:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:20,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:20,056 INFO L225 Difference]: With dead ends: 6669 [2021-02-19 17:17:20,056 INFO L226 Difference]: Without dead ends: 6633 [2021-02-19 17:17:20,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:17:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-02-19 17:17:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 5432. [2021-02-19 17:17:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 2.5860799116184863) internal successors, (14045), 5431 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 14045 transitions. [2021-02-19 17:17:20,127 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 14045 transitions. Word has length 41 [2021-02-19 17:17:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:20,127 INFO L480 AbstractCegarLoop]: Abstraction has 5432 states and 14045 transitions. [2021-02-19 17:17:20,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 14045 transitions. [2021-02-19 17:17:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:20,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:20,130 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:20,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:20,331 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1686647489, now seen corresponding path program 85 times [2021-02-19 17:17:20,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:20,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810236393] [2021-02-19 17:17:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:20,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810236393] [2021-02-19 17:17:20,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927776652] [2021-02-19 17:17:20,417 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:20,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:17:20,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 17:17:20,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:17:20,597 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-02-19 17:17:20,597 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:17:20,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:17:20,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-02-19 17:17:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:20,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:20,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-02-19 17:17:20,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557171322] [2021-02-19 17:17:20,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:17:20,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:20,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:17:20,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:17:20,607 INFO L87 Difference]: Start difference. First operand 5432 states and 14045 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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) [2021-02-19 17:17:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:21,980 INFO L93 Difference]: Finished difference Result 11534 states and 27378 transitions. [2021-02-19 17:17:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 17:17:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 41 [2021-02-19 17:17:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:21,992 INFO L225 Difference]: With dead ends: 11534 [2021-02-19 17:17:21,992 INFO L226 Difference]: Without dead ends: 11160 [2021-02-19 17:17:21,993 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=697, Invalid=5155, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 17:17:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11160 states. [2021-02-19 17:17:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11160 to 7099. [2021-02-19 17:17:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.569737954353339) internal successors, (18240), 7098 states have internal predecessors, (18240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:22,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18240 transitions. [2021-02-19 17:17:22,105 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18240 transitions. Word has length 41 [2021-02-19 17:17:22,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:22,105 INFO L480 AbstractCegarLoop]: Abstraction has 7099 states and 18240 transitions. [2021-02-19 17:17:22,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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) [2021-02-19 17:17:22,105 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18240 transitions. [2021-02-19 17:17:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:22,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:22,109 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:22,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-02-19 17:17:22,309 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:22,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:22,310 INFO L82 PathProgramCache]: Analyzing trace with hash 826705562, now seen corresponding path program 49 times [2021-02-19 17:17:22,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:22,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968299300] [2021-02-19 17:17:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:22,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968299300] [2021-02-19 17:17:22,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785217039] [2021-02-19 17:17:22,359 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:22,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:17:22,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:22,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:22,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-02-19 17:17:22,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533695292] [2021-02-19 17:17:22,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:22,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:22,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:22,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:22,453 INFO L87 Difference]: Start difference. First operand 7099 states and 18240 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:22,785 INFO L93 Difference]: Finished difference Result 8552 states and 21217 transitions. [2021-02-19 17:17:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:17:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:22,795 INFO L225 Difference]: With dead ends: 8552 [2021-02-19 17:17:22,795 INFO L226 Difference]: Without dead ends: 8552 [2021-02-19 17:17:22,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8552 states. [2021-02-19 17:17:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8552 to 6505. [2021-02-19 17:17:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 2.5899446494464944) internal successors, (16845), 6504 states have internal predecessors, (16845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 16845 transitions. [2021-02-19 17:17:22,903 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 16845 transitions. Word has length 41 [2021-02-19 17:17:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:22,903 INFO L480 AbstractCegarLoop]: Abstraction has 6505 states and 16845 transitions. [2021-02-19 17:17:22,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 16845 transitions. [2021-02-19 17:17:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:17:22,907 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:22,907 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:23,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:23,107 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1858902154, now seen corresponding path program 86 times [2021-02-19 17:17:23,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:23,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292683730] [2021-02-19 17:17:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:23,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292683730] [2021-02-19 17:17:23,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027537505] [2021-02-19 17:17:23,191 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:23,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:23,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:17:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:23,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:23,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:17:23,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747368098] [2021-02-19 17:17:23,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:17:23,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:23,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:17:23,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:23,277 INFO L87 Difference]: Start difference. First operand 6505 states and 16845 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:23,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:23,506 INFO L93 Difference]: Finished difference Result 7416 states and 18692 transitions. [2021-02-19 17:17:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:23,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:17:23,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:23,516 INFO L225 Difference]: With dead ends: 7416 [2021-02-19 17:17:23,516 INFO L226 Difference]: Without dead ends: 7369 [2021-02-19 17:17:23,516 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:17:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7369 states. [2021-02-19 17:17:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7369 to 6514. [2021-02-19 17:17:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6513 states have (on average 2.5885152771380318) internal successors, (16859), 6513 states have internal predecessors, (16859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 16859 transitions. [2021-02-19 17:17:23,610 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 16859 transitions. Word has length 41 [2021-02-19 17:17:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:23,610 INFO L480 AbstractCegarLoop]: Abstraction has 6514 states and 16859 transitions. [2021-02-19 17:17:23,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 16859 transitions. [2021-02-19 17:17:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:17:23,615 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:23,615 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:23,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-02-19 17:17:23,815 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:23,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1594502775, now seen corresponding path program 87 times [2021-02-19 17:17:23,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:23,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719464135] [2021-02-19 17:17:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:23,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719464135] [2021-02-19 17:17:23,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779510696] [2021-02-19 17:17:23,864 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:23,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:17:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:17:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:24,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:24,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-02-19 17:17:24,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763162963] [2021-02-19 17:17:24,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:17:24,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:17:24,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:17:24,110 INFO L87 Difference]: Start difference. First operand 6514 states and 16859 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:25,149 INFO L93 Difference]: Finished difference Result 9208 states and 22696 transitions. [2021-02-19 17:17:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:17:25,150 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:17:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:25,159 INFO L225 Difference]: With dead ends: 9208 [2021-02-19 17:17:25,159 INFO L226 Difference]: Without dead ends: 9161 [2021-02-19 17:17:25,159 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 17:17:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9161 states. [2021-02-19 17:17:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9161 to 7588. [2021-02-19 17:17:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7588 states, 7587 states have (on average 2.5732173454593386) internal successors, (19523), 7587 states have internal predecessors, (19523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7588 states to 7588 states and 19523 transitions. [2021-02-19 17:17:25,263 INFO L78 Accepts]: Start accepts. Automaton has 7588 states and 19523 transitions. Word has length 44 [2021-02-19 17:17:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:25,263 INFO L480 AbstractCegarLoop]: Abstraction has 7588 states and 19523 transitions. [2021-02-19 17:17:25,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 7588 states and 19523 transitions. [2021-02-19 17:17:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:17:25,268 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:25,268 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:25,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-02-19 17:17:25,469 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash 667583991, now seen corresponding path program 88 times [2021-02-19 17:17:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:25,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451162114] [2021-02-19 17:17:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:17:25,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451162114] [2021-02-19 17:17:25,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939362551] [2021-02-19 17:17:25,517 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:25,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:25,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:25,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:17:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:17:25,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:25,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:17:25,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833499283] [2021-02-19 17:17:25,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:17:25,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:25,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:17:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:17:25,600 INFO L87 Difference]: Start difference. First operand 7588 states and 19523 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:25,804 INFO L93 Difference]: Finished difference Result 8642 states and 21769 transitions. [2021-02-19 17:17:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:17:25,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:17:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:25,814 INFO L225 Difference]: With dead ends: 8642 [2021-02-19 17:17:25,814 INFO L226 Difference]: Without dead ends: 8598 [2021-02-19 17:17:25,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:17:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8598 states. [2021-02-19 17:17:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8598 to 7731. [2021-02-19 17:17:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 2.5697283311772314) internal successors, (19864), 7730 states have internal predecessors, (19864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 19864 transitions. [2021-02-19 17:17:25,912 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 19864 transitions. Word has length 44 [2021-02-19 17:17:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:25,912 INFO L480 AbstractCegarLoop]: Abstraction has 7731 states and 19864 transitions. [2021-02-19 17:17:25,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 19864 transitions. [2021-02-19 17:17:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:17:25,916 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:25,916 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:26,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:26,117 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash 880481316, now seen corresponding path program 1 times [2021-02-19 17:17:26,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:26,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602583603] [2021-02-19 17:17:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:26,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602583603] [2021-02-19 17:17:26,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205878331] [2021-02-19 17:17:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:26,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:26,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:26,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:26,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 17:17:26,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789256897] [2021-02-19 17:17:26,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:17:26,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:17:26,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:17:26,434 INFO L87 Difference]: Start difference. First operand 7731 states and 19864 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) [2021-02-19 17:17:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:26,845 INFO L93 Difference]: Finished difference Result 7845 states and 20045 transitions. [2021-02-19 17:17:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:26,846 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 44 [2021-02-19 17:17:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:26,853 INFO L225 Difference]: With dead ends: 7845 [2021-02-19 17:17:26,853 INFO L226 Difference]: Without dead ends: 7727 [2021-02-19 17:17:26,854 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:17:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-02-19 17:17:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7701. [2021-02-19 17:17:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7701 states, 7700 states have (on average 2.570649350649351) internal successors, (19794), 7700 states have internal predecessors, (19794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7701 states to 7701 states and 19794 transitions. [2021-02-19 17:17:26,958 INFO L78 Accepts]: Start accepts. Automaton has 7701 states and 19794 transitions. Word has length 44 [2021-02-19 17:17:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:26,958 INFO L480 AbstractCegarLoop]: Abstraction has 7701 states and 19794 transitions. [2021-02-19 17:17:26,958 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) [2021-02-19 17:17:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 7701 states and 19794 transitions. [2021-02-19 17:17:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:17:26,962 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:26,962 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:27,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-02-19 17:17:27,163 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash -19269487, now seen corresponding path program 89 times [2021-02-19 17:17:27,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:27,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091751841] [2021-02-19 17:17:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:17:27,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091751841] [2021-02-19 17:17:27,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962253383] [2021-02-19 17:17:27,212 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:27,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 17:17:27,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:17:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:17:27,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:27,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:17:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555151244] [2021-02-19 17:17:27,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:17:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:17:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:17:27,318 INFO L87 Difference]: Start difference. First operand 7701 states and 19794 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:27,555 INFO L93 Difference]: Finished difference Result 8580 states and 21649 transitions. [2021-02-19 17:17:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:17:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:17:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:27,567 INFO L225 Difference]: With dead ends: 8580 [2021-02-19 17:17:27,567 INFO L226 Difference]: Without dead ends: 8543 [2021-02-19 17:17:27,567 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:17:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-02-19 17:17:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 7765. [2021-02-19 17:17:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7765 states, 7764 states have (on average 2.566975785677486) internal successors, (19930), 7764 states have internal predecessors, (19930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7765 states to 7765 states and 19930 transitions. [2021-02-19 17:17:27,679 INFO L78 Accepts]: Start accepts. Automaton has 7765 states and 19930 transitions. Word has length 44 [2021-02-19 17:17:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:27,679 INFO L480 AbstractCegarLoop]: Abstraction has 7765 states and 19930 transitions. [2021-02-19 17:17:27,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7765 states and 19930 transitions. [2021-02-19 17:17:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:17:27,684 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:27,684 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:27,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:27,885 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:27,885 INFO L82 PathProgramCache]: Analyzing trace with hash -847034441, now seen corresponding path program 90 times [2021-02-19 17:17:27,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:27,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303908978] [2021-02-19 17:17:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:17:27,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303908978] [2021-02-19 17:17:27,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214843474] [2021-02-19 17:17:27,934 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:27,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-02-19 17:17:27,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:28,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:28,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-02-19 17:17:28,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133296930] [2021-02-19 17:17:28,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:17:28,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:17:28,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:28,116 INFO L87 Difference]: Start difference. First operand 7765 states and 19930 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:28,674 INFO L93 Difference]: Finished difference Result 10515 states and 25410 transitions. [2021-02-19 17:17:28,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:17:28,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:17:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:28,685 INFO L225 Difference]: With dead ends: 10515 [2021-02-19 17:17:28,685 INFO L226 Difference]: Without dead ends: 10454 [2021-02-19 17:17:28,687 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:17:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10454 states. [2021-02-19 17:17:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10454 to 7810. [2021-02-19 17:17:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 2.5625560250992443) internal successors, (20011), 7809 states have internal predecessors, (20011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 20011 transitions. [2021-02-19 17:17:28,799 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 20011 transitions. Word has length 44 [2021-02-19 17:17:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:28,799 INFO L480 AbstractCegarLoop]: Abstraction has 7810 states and 20011 transitions. [2021-02-19 17:17:28,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 20011 transitions. [2021-02-19 17:17:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:17:28,804 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:28,804 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:29,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:29,004 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash 909434577, now seen corresponding path program 91 times [2021-02-19 17:17:29,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:29,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257014112] [2021-02-19 17:17:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:17:29,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257014112] [2021-02-19 17:17:29,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541891112] [2021-02-19 17:17:29,052 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:17:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:17:29,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:29,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-02-19 17:17:29,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602754678] [2021-02-19 17:17:29,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:17:29,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:29,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:17:29,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:17:29,135 INFO L87 Difference]: Start difference. First operand 7810 states and 20011 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:29,359 INFO L93 Difference]: Finished difference Result 8580 states and 21601 transitions. [2021-02-19 17:17:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:17:29,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:17:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:29,368 INFO L225 Difference]: With dead ends: 8580 [2021-02-19 17:17:29,368 INFO L226 Difference]: Without dead ends: 8543 [2021-02-19 17:17:29,368 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:17:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-02-19 17:17:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 7882. [2021-02-19 17:17:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7882 states, 7881 states have (on average 2.557162796599416) internal successors, (20153), 7881 states have internal predecessors, (20153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7882 states to 7882 states and 20153 transitions. [2021-02-19 17:17:29,463 INFO L78 Accepts]: Start accepts. Automaton has 7882 states and 20153 transitions. Word has length 44 [2021-02-19 17:17:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:29,463 INFO L480 AbstractCegarLoop]: Abstraction has 7882 states and 20153 transitions. [2021-02-19 17:17:29,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7882 states and 20153 transitions. [2021-02-19 17:17:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:17:29,467 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:29,467 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:29,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:29,668 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1886175114, now seen corresponding path program 2 times [2021-02-19 17:17:29,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:29,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418546051] [2021-02-19 17:17:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:29,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418546051] [2021-02-19 17:17:29,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675244965] [2021-02-19 17:17:29,756 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:29,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:29,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:29,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:29,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-02-19 17:17:29,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779527253] [2021-02-19 17:17:29,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:17:29,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:29,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:17:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:29,934 INFO L87 Difference]: Start difference. First operand 7882 states and 20153 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) [2021-02-19 17:17:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:30,264 INFO L93 Difference]: Finished difference Result 7972 states and 20292 transitions. [2021-02-19 17:17:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:30,265 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 44 [2021-02-19 17:17:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:30,273 INFO L225 Difference]: With dead ends: 7972 [2021-02-19 17:17:30,273 INFO L226 Difference]: Without dead ends: 7878 [2021-02-19 17:17:30,273 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-02-19 17:17:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7852. [2021-02-19 17:17:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7852 states, 7851 states have (on average 2.5580180868679148) internal successors, (20083), 7851 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7852 states to 7852 states and 20083 transitions. [2021-02-19 17:17:30,361 INFO L78 Accepts]: Start accepts. Automaton has 7852 states and 20083 transitions. Word has length 44 [2021-02-19 17:17:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:30,361 INFO L480 AbstractCegarLoop]: Abstraction has 7852 states and 20083 transitions. [2021-02-19 17:17:30,362 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) [2021-02-19 17:17:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7852 states and 20083 transitions. [2021-02-19 17:17:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:17:30,366 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:30,366 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:30,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:30,567 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:30,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:30,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1721768862, now seen corresponding path program 3 times [2021-02-19 17:17:30,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:30,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774688951] [2021-02-19 17:17:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:30,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774688951] [2021-02-19 17:17:30,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770015659] [2021-02-19 17:17:30,644 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:30,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:17:30,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:30,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:17:30,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 19 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:30,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:30,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 17:17:30,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478938229] [2021-02-19 17:17:30,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:17:30,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:30,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:17:30,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:30,799 INFO L87 Difference]: Start difference. First operand 7852 states and 20083 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-02-19 17:17:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:31,096 INFO L93 Difference]: Finished difference Result 7904 states and 20150 transitions. [2021-02-19 17:17:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 44 [2021-02-19 17:17:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:31,106 INFO L225 Difference]: With dead ends: 7904 [2021-02-19 17:17:31,106 INFO L226 Difference]: Without dead ends: 7834 [2021-02-19 17:17:31,106 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7834 states. [2021-02-19 17:17:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7834 to 7808. [2021-02-19 17:17:31,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7808 states, 7807 states have (on average 2.559625976687588) internal successors, (19983), 7807 states have internal predecessors, (19983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7808 states to 7808 states and 19983 transitions. [2021-02-19 17:17:31,196 INFO L78 Accepts]: Start accepts. Automaton has 7808 states and 19983 transitions. Word has length 44 [2021-02-19 17:17:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:31,196 INFO L480 AbstractCegarLoop]: Abstraction has 7808 states and 19983 transitions. [2021-02-19 17:17:31,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-02-19 17:17:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7808 states and 19983 transitions. [2021-02-19 17:17:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:31,201 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:31,201 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:31,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-02-19 17:17:31,410 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:31,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:31,410 INFO L82 PathProgramCache]: Analyzing trace with hash 106678836, now seen corresponding path program 50 times [2021-02-19 17:17:31,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:31,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95358901] [2021-02-19 17:17:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:31,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95358901] [2021-02-19 17:17:31,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716336866] [2021-02-19 17:17:31,520 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:31,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:31,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:31,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:17:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:32,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:32,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-02-19 17:17:32,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244253709] [2021-02-19 17:17:32,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:17:32,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:32,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:17:32,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:17:32,283 INFO L87 Difference]: Start difference. First operand 7808 states and 19983 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:40,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:40,955 INFO L93 Difference]: Finished difference Result 18551 states and 43891 transitions. [2021-02-19 17:17:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-02-19 17:17:40,955 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:40,977 INFO L225 Difference]: With dead ends: 18551 [2021-02-19 17:17:40,977 INFO L226 Difference]: Without dead ends: 18105 [2021-02-19 17:17:40,979 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=5955, Invalid=38777, Unknown=0, NotChecked=0, Total=44732 [2021-02-19 17:17:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18105 states. [2021-02-19 17:17:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18105 to 10044. [2021-02-19 17:17:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10044 states, 10043 states have (on average 2.592751169969133) internal successors, (26039), 10043 states have internal predecessors, (26039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10044 states to 10044 states and 26039 transitions. [2021-02-19 17:17:41,169 INFO L78 Accepts]: Start accepts. Automaton has 10044 states and 26039 transitions. Word has length 47 [2021-02-19 17:17:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:41,169 INFO L480 AbstractCegarLoop]: Abstraction has 10044 states and 26039 transitions. [2021-02-19 17:17:41,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10044 states and 26039 transitions. [2021-02-19 17:17:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:41,177 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:41,177 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:41,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-02-19 17:17:41,382 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1340385804, now seen corresponding path program 92 times [2021-02-19 17:17:41,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:41,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841753582] [2021-02-19 17:17:41,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:41,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841753582] [2021-02-19 17:17:41,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361165628] [2021-02-19 17:17:41,500 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:41,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:41,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:41,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:41,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:41,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-02-19 17:17:41,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237761495] [2021-02-19 17:17:41,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:17:41,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:41,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:17:41,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:17:41,763 INFO L87 Difference]: Start difference. First operand 10044 states and 26039 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) [2021-02-19 17:17:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:42,420 INFO L93 Difference]: Finished difference Result 10459 states and 26759 transitions. [2021-02-19 17:17:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:17:42,420 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 47 [2021-02-19 17:17:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:42,431 INFO L225 Difference]: With dead ends: 10459 [2021-02-19 17:17:42,431 INFO L226 Difference]: Without dead ends: 10211 [2021-02-19 17:17:42,431 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:17:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-02-19 17:17:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9926. [2021-02-19 17:17:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9926 states, 9925 states have (on average 2.5899244332493705) internal successors, (25705), 9925 states have internal predecessors, (25705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9926 states to 9926 states and 25705 transitions. [2021-02-19 17:17:42,549 INFO L78 Accepts]: Start accepts. Automaton has 9926 states and 25705 transitions. Word has length 47 [2021-02-19 17:17:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:42,549 INFO L480 AbstractCegarLoop]: Abstraction has 9926 states and 25705 transitions. [2021-02-19 17:17:42,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 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) [2021-02-19 17:17:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 9926 states and 25705 transitions. [2021-02-19 17:17:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:42,556 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:42,556 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:42,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-02-19 17:17:42,762 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:42,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:42,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131655, now seen corresponding path program 51 times [2021-02-19 17:17:42,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:42,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860595235] [2021-02-19 17:17:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:42,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860595235] [2021-02-19 17:17:42,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914486211] [2021-02-19 17:17:42,823 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:42,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:17:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:42,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:42,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:42,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:17:42,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019547830] [2021-02-19 17:17:42,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:42,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:42,944 INFO L87 Difference]: Start difference. First operand 9926 states and 25705 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:17:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:43,125 INFO L93 Difference]: Finished difference Result 12162 states and 30154 transitions. [2021-02-19 17:17:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:43,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 47 [2021-02-19 17:17:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:43,141 INFO L225 Difference]: With dead ends: 12162 [2021-02-19 17:17:43,141 INFO L226 Difference]: Without dead ends: 12152 [2021-02-19 17:17:43,141 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12152 states. [2021-02-19 17:17:43,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12152 to 9982. [2021-02-19 17:17:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9982 states, 9981 states have (on average 2.5934275122733195) internal successors, (25885), 9981 states have internal predecessors, (25885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9982 states to 9982 states and 25885 transitions. [2021-02-19 17:17:43,299 INFO L78 Accepts]: Start accepts. Automaton has 9982 states and 25885 transitions. Word has length 47 [2021-02-19 17:17:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:43,299 INFO L480 AbstractCegarLoop]: Abstraction has 9982 states and 25885 transitions. [2021-02-19 17:17:43,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:17:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9982 states and 25885 transitions. [2021-02-19 17:17:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:43,307 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:43,307 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:43,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-02-19 17:17:43,507 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:43,507 INFO L82 PathProgramCache]: Analyzing trace with hash 800939015, now seen corresponding path program 52 times [2021-02-19 17:17:43,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:43,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180056001] [2021-02-19 17:17:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:43,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180056001] [2021-02-19 17:17:43,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754779448] [2021-02-19 17:17:43,565 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:43,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:43,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:43,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:43,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:43,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:43,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:17:43,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555056108] [2021-02-19 17:17:43,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:43,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:43,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:43,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:43,670 INFO L87 Difference]: Start difference. First operand 9982 states and 25885 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:17:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:43,867 INFO L93 Difference]: Finished difference Result 13467 states and 33646 transitions. [2021-02-19 17:17:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:43,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-02-19 17:17:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:43,882 INFO L225 Difference]: With dead ends: 13467 [2021-02-19 17:17:43,882 INFO L226 Difference]: Without dead ends: 13467 [2021-02-19 17:17:43,882 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-02-19 17:17:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 10629. [2021-02-19 17:17:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10629 states, 10628 states have (on average 2.6229770417764398) internal successors, (27877), 10628 states have internal predecessors, (27877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10629 states to 10629 states and 27877 transitions. [2021-02-19 17:17:44,057 INFO L78 Accepts]: Start accepts. Automaton has 10629 states and 27877 transitions. Word has length 47 [2021-02-19 17:17:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:44,057 INFO L480 AbstractCegarLoop]: Abstraction has 10629 states and 27877 transitions. [2021-02-19 17:17:44,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:17:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10629 states and 27877 transitions. [2021-02-19 17:17:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:44,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:44,064 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:44,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:44,264 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash 267073639, now seen corresponding path program 93 times [2021-02-19 17:17:44,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:44,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925149557] [2021-02-19 17:17:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:44,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925149557] [2021-02-19 17:17:44,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832983120] [2021-02-19 17:17:44,333 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:44,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:17:44,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:44,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:44,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:44,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:44,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:17:44,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467773593] [2021-02-19 17:17:44,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:44,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:44,451 INFO L87 Difference]: Start difference. First operand 10629 states and 27877 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:44,612 INFO L93 Difference]: Finished difference Result 11523 states and 29624 transitions. [2021-02-19 17:17:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:17:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:44,627 INFO L225 Difference]: With dead ends: 11523 [2021-02-19 17:17:44,627 INFO L226 Difference]: Without dead ends: 11517 [2021-02-19 17:17:44,627 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11517 states. [2021-02-19 17:17:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11517 to 10468. [2021-02-19 17:17:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.6154581064297315) internal successors, (27376), 10467 states have internal predecessors, (27376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 27376 transitions. [2021-02-19 17:17:44,768 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 27376 transitions. Word has length 47 [2021-02-19 17:17:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:44,768 INFO L480 AbstractCegarLoop]: Abstraction has 10468 states and 27376 transitions. [2021-02-19 17:17:44,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 27376 transitions. [2021-02-19 17:17:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:44,775 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:44,775 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:44,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-02-19 17:17:44,975 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:44,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:44,975 INFO L82 PathProgramCache]: Analyzing trace with hash 199561857, now seen corresponding path program 94 times [2021-02-19 17:17:44,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:44,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794762281] [2021-02-19 17:17:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:45,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794762281] [2021-02-19 17:17:45,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468701213] [2021-02-19 17:17:45,026 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:45,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:45,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:45,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:17:45,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809061013] [2021-02-19 17:17:45,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:45,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:45,133 INFO L87 Difference]: Start difference. First operand 10468 states and 27376 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:45,332 INFO L93 Difference]: Finished difference Result 14959 states and 37714 transitions. [2021-02-19 17:17:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:45,351 INFO L225 Difference]: With dead ends: 14959 [2021-02-19 17:17:45,351 INFO L226 Difference]: Without dead ends: 14959 [2021-02-19 17:17:45,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14959 states. [2021-02-19 17:17:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14959 to 10716. [2021-02-19 17:17:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10716 states, 10715 states have (on average 2.626411572561829) internal successors, (28142), 10715 states have internal predecessors, (28142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10716 states to 10716 states and 28142 transitions. [2021-02-19 17:17:45,524 INFO L78 Accepts]: Start accepts. Automaton has 10716 states and 28142 transitions. Word has length 47 [2021-02-19 17:17:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:45,524 INFO L480 AbstractCegarLoop]: Abstraction has 10716 states and 28142 transitions. [2021-02-19 17:17:45,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10716 states and 28142 transitions. [2021-02-19 17:17:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:45,531 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:45,531 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:45,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:45,732 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:45,732 INFO L82 PathProgramCache]: Analyzing trace with hash -38499660, now seen corresponding path program 53 times [2021-02-19 17:17:45,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:45,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663734615] [2021-02-19 17:17:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:45,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663734615] [2021-02-19 17:17:45,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605338925] [2021-02-19 17:17:45,809 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:45,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:17:45,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:45,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:45,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:17:45,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061295610] [2021-02-19 17:17:45,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:45,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:45,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:45,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:45,912 INFO L87 Difference]: Start difference. First operand 10716 states and 28142 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:46,302 INFO L93 Difference]: Finished difference Result 12374 states and 31546 transitions. [2021-02-19 17:17:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:46,316 INFO L225 Difference]: With dead ends: 12374 [2021-02-19 17:17:46,316 INFO L226 Difference]: Without dead ends: 12331 [2021-02-19 17:17:46,317 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12331 states. [2021-02-19 17:17:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12331 to 10993. [2021-02-19 17:17:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10993 states, 10992 states have (on average 2.6203602620087336) internal successors, (28803), 10992 states have internal predecessors, (28803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 28803 transitions. [2021-02-19 17:17:46,467 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 28803 transitions. Word has length 47 [2021-02-19 17:17:46,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:46,467 INFO L480 AbstractCegarLoop]: Abstraction has 10993 states and 28803 transitions. [2021-02-19 17:17:46,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:46,467 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 28803 transitions. [2021-02-19 17:17:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:46,474 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:46,474 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:46,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-02-19 17:17:46,675 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:46,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1592196517, now seen corresponding path program 95 times [2021-02-19 17:17:46,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:46,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904204325] [2021-02-19 17:17:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:46,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904204325] [2021-02-19 17:17:46,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978758154] [2021-02-19 17:17:46,728 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:46,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:17:46,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:46,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:46,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:46,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:46,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2021-02-19 17:17:46,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724916845] [2021-02-19 17:17:46,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:17:46,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:17:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:17:46,857 INFO L87 Difference]: Start difference. First operand 10993 states and 28803 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:47,079 INFO L93 Difference]: Finished difference Result 12690 states and 32099 transitions. [2021-02-19 17:17:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:47,096 INFO L225 Difference]: With dead ends: 12690 [2021-02-19 17:17:47,096 INFO L226 Difference]: Without dead ends: 12681 [2021-02-19 17:17:47,097 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:17:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12681 states. [2021-02-19 17:17:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12681 to 10974. [2021-02-19 17:17:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10974 states, 10973 states have (on average 2.617606853185091) internal successors, (28723), 10973 states have internal predecessors, (28723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10974 states to 10974 states and 28723 transitions. [2021-02-19 17:17:47,251 INFO L78 Accepts]: Start accepts. Automaton has 10974 states and 28723 transitions. Word has length 47 [2021-02-19 17:17:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:47,251 INFO L480 AbstractCegarLoop]: Abstraction has 10974 states and 28723 transitions. [2021-02-19 17:17:47,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 10974 states and 28723 transitions. [2021-02-19 17:17:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:47,258 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:47,258 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:47,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-02-19 17:17:47,459 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1385133951, now seen corresponding path program 96 times [2021-02-19 17:17:47,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:47,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397417828] [2021-02-19 17:17:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:47,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397417828] [2021-02-19 17:17:47,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353276791] [2021-02-19 17:17:47,517 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:47,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:17:47,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:47,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:47,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:47,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:47,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:17:47,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317743984] [2021-02-19 17:17:47,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:47,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:47,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:47,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:47,620 INFO L87 Difference]: Start difference. First operand 10974 states and 28723 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:47,838 INFO L93 Difference]: Finished difference Result 12440 states and 31492 transitions. [2021-02-19 17:17:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:47,853 INFO L225 Difference]: With dead ends: 12440 [2021-02-19 17:17:47,853 INFO L226 Difference]: Without dead ends: 12422 [2021-02-19 17:17:47,853 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12422 states. [2021-02-19 17:17:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12422 to 10986. [2021-02-19 17:17:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10986 states, 10985 states have (on average 2.6160218479745105) internal successors, (28737), 10985 states have internal predecessors, (28737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10986 states to 10986 states and 28737 transitions. [2021-02-19 17:17:48,002 INFO L78 Accepts]: Start accepts. Automaton has 10986 states and 28737 transitions. Word has length 47 [2021-02-19 17:17:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:48,003 INFO L480 AbstractCegarLoop]: Abstraction has 10986 states and 28737 transitions. [2021-02-19 17:17:48,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 10986 states and 28737 transitions. [2021-02-19 17:17:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:48,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:48,010 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:48,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-02-19 17:17:48,210 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1461833332, now seen corresponding path program 97 times [2021-02-19 17:17:48,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:48,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562741666] [2021-02-19 17:17:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:48,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562741666] [2021-02-19 17:17:48,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845415047] [2021-02-19 17:17:48,279 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:48,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:48,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-02-19 17:17:48,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943038679] [2021-02-19 17:17:48,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:48,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:48,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:48,451 INFO L87 Difference]: Start difference. First operand 10986 states and 28737 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-02-19 17:17:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:48,964 INFO L93 Difference]: Finished difference Result 11805 states and 30235 transitions. [2021-02-19 17:17:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:48,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 47 [2021-02-19 17:17:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:48,979 INFO L225 Difference]: With dead ends: 11805 [2021-02-19 17:17:48,980 INFO L226 Difference]: Without dead ends: 11749 [2021-02-19 17:17:48,980 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11749 states. [2021-02-19 17:17:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11749 to 10944. [2021-02-19 17:17:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10944 states, 10943 states have (on average 2.614822260805995) internal successors, (28614), 10943 states have internal predecessors, (28614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 28614 transitions. [2021-02-19 17:17:49,140 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 28614 transitions. Word has length 47 [2021-02-19 17:17:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:49,140 INFO L480 AbstractCegarLoop]: Abstraction has 10944 states and 28614 transitions. [2021-02-19 17:17:49,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-02-19 17:17:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 28614 transitions. [2021-02-19 17:17:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:49,147 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:49,147 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:49,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-02-19 17:17:49,348 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:49,348 INFO L82 PathProgramCache]: Analyzing trace with hash 848297152, now seen corresponding path program 98 times [2021-02-19 17:17:49,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:49,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652434327] [2021-02-19 17:17:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:49,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652434327] [2021-02-19 17:17:49,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768823704] [2021-02-19 17:17:49,426 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:17:49,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:49,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:49,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:49,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:49,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:49,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:17:49,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186475160] [2021-02-19 17:17:49,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:49,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:49,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:49,537 INFO L87 Difference]: Start difference. First operand 10944 states and 28614 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:49,890 INFO L93 Difference]: Finished difference Result 12000 states and 30676 transitions. [2021-02-19 17:17:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:49,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:49,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:49,904 INFO L225 Difference]: With dead ends: 12000 [2021-02-19 17:17:49,904 INFO L226 Difference]: Without dead ends: 11959 [2021-02-19 17:17:49,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2021-02-19 17:17:50,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 10921. [2021-02-19 17:17:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10921 states, 10920 states have (on average 2.615018315018315) internal successors, (28556), 10920 states have internal predecessors, (28556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10921 states to 10921 states and 28556 transitions. [2021-02-19 17:17:50,054 INFO L78 Accepts]: Start accepts. Automaton has 10921 states and 28556 transitions. Word has length 47 [2021-02-19 17:17:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:50,055 INFO L480 AbstractCegarLoop]: Abstraction has 10921 states and 28556 transitions. [2021-02-19 17:17:50,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10921 states and 28556 transitions. [2021-02-19 17:17:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:50,062 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:50,062 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:50,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:50,262 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:50,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1304752810, now seen corresponding path program 99 times [2021-02-19 17:17:50,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:50,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549078568] [2021-02-19 17:17:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:50,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549078568] [2021-02-19 17:17:50,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004759318] [2021-02-19 17:17:50,337 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:50,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:17:50,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:50,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:50,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:50,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:50,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:17:50,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983194882] [2021-02-19 17:17:50,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:50,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:50,440 INFO L87 Difference]: Start difference. First operand 10921 states and 28556 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:50,892 INFO L93 Difference]: Finished difference Result 12408 states and 31512 transitions. [2021-02-19 17:17:50,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:17:50,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:50,908 INFO L225 Difference]: With dead ends: 12408 [2021-02-19 17:17:50,908 INFO L226 Difference]: Without dead ends: 12396 [2021-02-19 17:17:50,908 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12396 states. [2021-02-19 17:17:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12396 to 10956. [2021-02-19 17:17:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10956 states, 10955 states have (on average 2.6144226380648106) internal successors, (28641), 10955 states have internal predecessors, (28641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10956 states to 10956 states and 28641 transitions. [2021-02-19 17:17:51,082 INFO L78 Accepts]: Start accepts. Automaton has 10956 states and 28641 transitions. Word has length 47 [2021-02-19 17:17:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:51,082 INFO L480 AbstractCegarLoop]: Abstraction has 10956 states and 28641 transitions. [2021-02-19 17:17:51,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10956 states and 28641 transitions. [2021-02-19 17:17:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:51,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:51,089 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:51,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:51,290 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1542814327, now seen corresponding path program 54 times [2021-02-19 17:17:51,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:51,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438125468] [2021-02-19 17:17:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:51,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438125468] [2021-02-19 17:17:51,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162415888] [2021-02-19 17:17:51,346 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:51,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:17:51,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:51,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:51,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:51,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 16 [2021-02-19 17:17:51,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119804457] [2021-02-19 17:17:51,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:17:51,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:51,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:17:51,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:17:51,499 INFO L87 Difference]: Start difference. First operand 10956 states and 28641 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:51,827 INFO L93 Difference]: Finished difference Result 14192 states and 35536 transitions. [2021-02-19 17:17:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:17:51,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:51,847 INFO L225 Difference]: With dead ends: 14192 [2021-02-19 17:17:51,847 INFO L226 Difference]: Without dead ends: 14170 [2021-02-19 17:17:51,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14170 states. [2021-02-19 17:17:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14170 to 11133. [2021-02-19 17:17:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11133 states, 11132 states have (on average 2.6205533596837944) internal successors, (29172), 11132 states have internal predecessors, (29172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11133 states to 11133 states and 29172 transitions. [2021-02-19 17:17:52,025 INFO L78 Accepts]: Start accepts. Automaton has 11133 states and 29172 transitions. Word has length 47 [2021-02-19 17:17:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:52,025 INFO L480 AbstractCegarLoop]: Abstraction has 11133 states and 29172 transitions. [2021-02-19 17:17:52,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 11133 states and 29172 transitions. [2021-02-19 17:17:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:52,032 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:52,032 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:52,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:52,233 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2130272559, now seen corresponding path program 55 times [2021-02-19 17:17:52,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:52,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246715068] [2021-02-19 17:17:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:52,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246715068] [2021-02-19 17:17:52,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208071955] [2021-02-19 17:17:52,291 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:52,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:52,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:17:52,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204364567] [2021-02-19 17:17:52,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:52,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:52,400 INFO L87 Difference]: Start difference. First operand 11133 states and 29172 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:17:52,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:52,599 INFO L93 Difference]: Finished difference Result 14656 states and 36594 transitions. [2021-02-19 17:17:52,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:52,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-02-19 17:17:52,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:52,619 INFO L225 Difference]: With dead ends: 14656 [2021-02-19 17:17:52,619 INFO L226 Difference]: Without dead ends: 14656 [2021-02-19 17:17:52,619 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-02-19 17:17:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 11138. [2021-02-19 17:17:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 2.620184969022178) internal successors, (29181), 11137 states have internal predecessors, (29181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 29181 transitions. [2021-02-19 17:17:52,818 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 29181 transitions. Word has length 47 [2021-02-19 17:17:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:52,818 INFO L480 AbstractCegarLoop]: Abstraction has 11138 states and 29181 transitions. [2021-02-19 17:17:52,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:17:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 29181 transitions. [2021-02-19 17:17:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:52,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:52,826 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:53,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-02-19 17:17:53,027 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:53,027 INFO L82 PathProgramCache]: Analyzing trace with hash 492700103, now seen corresponding path program 56 times [2021-02-19 17:17:53,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:53,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348068186] [2021-02-19 17:17:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:53,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348068186] [2021-02-19 17:17:53,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963291240] [2021-02-19 17:17:53,095 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:53,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:53,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:53,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:53,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:53,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:53,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:17:53,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968089789] [2021-02-19 17:17:53,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:17:53,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:53,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:17:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:17:53,205 INFO L87 Difference]: Start difference. First operand 11138 states and 29181 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) [2021-02-19 17:17:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:53,450 INFO L93 Difference]: Finished difference Result 13817 states and 34624 transitions. [2021-02-19 17:17:53,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:53,451 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 47 [2021-02-19 17:17:53,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:53,469 INFO L225 Difference]: With dead ends: 13817 [2021-02-19 17:17:53,470 INFO L226 Difference]: Without dead ends: 13817 [2021-02-19 17:17:53,470 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13817 states. [2021-02-19 17:17:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13817 to 10965. [2021-02-19 17:17:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10965 states, 10964 states have (on average 2.615468807004743) internal successors, (28676), 10964 states have internal predecessors, (28676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10965 states to 10965 states and 28676 transitions. [2021-02-19 17:17:53,653 INFO L78 Accepts]: Start accepts. Automaton has 10965 states and 28676 transitions. Word has length 47 [2021-02-19 17:17:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:53,653 INFO L480 AbstractCegarLoop]: Abstraction has 10965 states and 28676 transitions. [2021-02-19 17:17:53,653 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) [2021-02-19 17:17:53,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10965 states and 28676 transitions. [2021-02-19 17:17:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:53,661 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:53,661 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:53,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:53,861 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash 227806299, now seen corresponding path program 100 times [2021-02-19 17:17:53,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:53,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124690796] [2021-02-19 17:17:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:53,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124690796] [2021-02-19 17:17:53,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230210295] [2021-02-19 17:17:53,934 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:53,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:53,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:53,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:53,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:54,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:54,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:17:54,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650803623] [2021-02-19 17:17:54,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:17:54,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:54,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:17:54,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:54,033 INFO L87 Difference]: Start difference. First operand 10965 states and 28676 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:54,220 INFO L93 Difference]: Finished difference Result 12231 states and 31080 transitions. [2021-02-19 17:17:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:54,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:54,235 INFO L225 Difference]: With dead ends: 12231 [2021-02-19 17:17:54,235 INFO L226 Difference]: Without dead ends: 12213 [2021-02-19 17:17:54,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12213 states. [2021-02-19 17:17:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12213 to 10965. [2021-02-19 17:17:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10965 states, 10964 states have (on average 2.6145567311200293) internal successors, (28666), 10964 states have internal predecessors, (28666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10965 states to 10965 states and 28666 transitions. [2021-02-19 17:17:54,396 INFO L78 Accepts]: Start accepts. Automaton has 10965 states and 28666 transitions. Word has length 47 [2021-02-19 17:17:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:54,396 INFO L480 AbstractCegarLoop]: Abstraction has 10965 states and 28666 transitions. [2021-02-19 17:17:54,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 10965 states and 28666 transitions. [2021-02-19 17:17:54,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:54,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:54,404 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:54,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:54,604 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash -866264614, now seen corresponding path program 57 times [2021-02-19 17:17:54,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:54,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151016275] [2021-02-19 17:17:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:54,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151016275] [2021-02-19 17:17:54,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745805642] [2021-02-19 17:17:54,687 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:54,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:17:54,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:54,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:54,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:54,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 21 [2021-02-19 17:17:54,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956530639] [2021-02-19 17:17:54,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:17:54,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:54,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:17:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:54,938 INFO L87 Difference]: Start difference. First operand 10965 states and 28666 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:56,246 INFO L93 Difference]: Finished difference Result 13117 states and 33100 transitions. [2021-02-19 17:17:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:17:56,247 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:56,261 INFO L225 Difference]: With dead ends: 13117 [2021-02-19 17:17:56,261 INFO L226 Difference]: Without dead ends: 13051 [2021-02-19 17:17:56,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:17:56,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13051 states. [2021-02-19 17:17:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13051 to 11169. [2021-02-19 17:17:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11169 states, 11168 states have (on average 2.6111210601719197) internal successors, (29161), 11168 states have internal predecessors, (29161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11169 states to 11169 states and 29161 transitions. [2021-02-19 17:17:56,414 INFO L78 Accepts]: Start accepts. Automaton has 11169 states and 29161 transitions. Word has length 47 [2021-02-19 17:17:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:56,414 INFO L480 AbstractCegarLoop]: Abstraction has 11169 states and 29161 transitions. [2021-02-19 17:17:56,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11169 states and 29161 transitions. [2021-02-19 17:17:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:56,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:56,421 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:56,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-02-19 17:17:56,622 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:56,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1875005825, now seen corresponding path program 101 times [2021-02-19 17:17:56,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:56,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742364915] [2021-02-19 17:17:56,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742364915] [2021-02-19 17:17:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22326575] [2021-02-19 17:17:56,670 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:56,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:17:56,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:56,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:56,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-02-19 17:17:56,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224763540] [2021-02-19 17:17:56,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:17:56,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:56,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:17:56,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:56,785 INFO L87 Difference]: Start difference. First operand 11169 states and 29161 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:57,000 INFO L93 Difference]: Finished difference Result 12909 states and 32563 transitions. [2021-02-19 17:17:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:57,015 INFO L225 Difference]: With dead ends: 12909 [2021-02-19 17:17:57,015 INFO L226 Difference]: Without dead ends: 12906 [2021-02-19 17:17:57,016 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:17:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-02-19 17:17:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 11155. [2021-02-19 17:17:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11155 states, 11154 states have (on average 2.6095571095571097) internal successors, (29107), 11154 states have internal predecessors, (29107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11155 states to 11155 states and 29107 transitions. [2021-02-19 17:17:57,173 INFO L78 Accepts]: Start accepts. Automaton has 11155 states and 29107 transitions. Word has length 47 [2021-02-19 17:17:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:57,173 INFO L480 AbstractCegarLoop]: Abstraction has 11155 states and 29107 transitions. [2021-02-19 17:17:57,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 11155 states and 29107 transitions. [2021-02-19 17:17:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:57,181 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:57,181 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:57,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:57,381 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2082068391, now seen corresponding path program 102 times [2021-02-19 17:17:57,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:57,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233580625] [2021-02-19 17:17:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:57,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233580625] [2021-02-19 17:17:57,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676930235] [2021-02-19 17:17:57,437 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:57,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:17:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:17:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:57,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:57,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:17:57,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387918988] [2021-02-19 17:17:57,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:57,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:57,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:57,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:57,538 INFO L87 Difference]: Start difference. First operand 11155 states and 29107 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:57,716 INFO L93 Difference]: Finished difference Result 12728 states and 32115 transitions. [2021-02-19 17:17:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:57,735 INFO L225 Difference]: With dead ends: 12728 [2021-02-19 17:17:57,735 INFO L226 Difference]: Without dead ends: 12710 [2021-02-19 17:17:57,735 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-02-19 17:17:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 11218. [2021-02-19 17:17:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11218 states, 11217 states have (on average 2.6064009984844434) internal successors, (29236), 11217 states have internal predecessors, (29236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11218 states to 11218 states and 29236 transitions. [2021-02-19 17:17:57,910 INFO L78 Accepts]: Start accepts. Automaton has 11218 states and 29236 transitions. Word has length 47 [2021-02-19 17:17:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:57,911 INFO L480 AbstractCegarLoop]: Abstraction has 11218 states and 29236 transitions. [2021-02-19 17:17:57,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 11218 states and 29236 transitions. [2021-02-19 17:17:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:57,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:57,918 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:58,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:58,119 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash 634068378, now seen corresponding path program 103 times [2021-02-19 17:17:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:58,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130996047] [2021-02-19 17:17:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:58,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130996047] [2021-02-19 17:17:58,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914019119] [2021-02-19 17:17:58,209 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:58,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:58,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:58,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-02-19 17:17:58,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879504551] [2021-02-19 17:17:58,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:58,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:58,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:58,370 INFO L87 Difference]: Start difference. First operand 11218 states and 29236 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-02-19 17:17:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:58,832 INFO L93 Difference]: Finished difference Result 12000 states and 30668 transitions. [2021-02-19 17:17:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 47 [2021-02-19 17:17:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:58,846 INFO L225 Difference]: With dead ends: 12000 [2021-02-19 17:17:58,846 INFO L226 Difference]: Without dead ends: 11932 [2021-02-19 17:17:58,846 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11932 states. [2021-02-19 17:17:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11932 to 11181. [2021-02-19 17:17:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11181 states, 11180 states have (on average 2.6043828264758497) internal successors, (29117), 11180 states have internal predecessors, (29117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 29117 transitions. [2021-02-19 17:17:59,012 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 29117 transitions. Word has length 47 [2021-02-19 17:17:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:59,012 INFO L480 AbstractCegarLoop]: Abstraction has 11181 states and 29117 transitions. [2021-02-19 17:17:59,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-02-19 17:17:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 29117 transitions. [2021-02-19 17:17:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:59,020 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:59,021 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:59,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:59,221 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash 20532198, now seen corresponding path program 104 times [2021-02-19 17:17:59,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:59,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025209113] [2021-02-19 17:17:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:59,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025209113] [2021-02-19 17:17:59,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406260462] [2021-02-19 17:17:59,300 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:59,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:59,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:59,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:59,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:59,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:59,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:17:59,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541413923] [2021-02-19 17:17:59,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:17:59,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:59,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:17:59,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:59,400 INFO L87 Difference]: Start difference. First operand 11181 states and 29117 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:59,767 INFO L93 Difference]: Finished difference Result 12322 states and 31370 transitions. [2021-02-19 17:17:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:17:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:17:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:59,782 INFO L225 Difference]: With dead ends: 12322 [2021-02-19 17:17:59,782 INFO L226 Difference]: Without dead ends: 12274 [2021-02-19 17:17:59,782 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:17:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12274 states. [2021-02-19 17:17:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12274 to 11043. [2021-02-19 17:17:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11043 states, 11042 states have (on average 2.606411881905452) internal successors, (28780), 11042 states have internal predecessors, (28780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11043 states to 11043 states and 28780 transitions. [2021-02-19 17:17:59,940 INFO L78 Accepts]: Start accepts. Automaton has 11043 states and 28780 transitions. Word has length 47 [2021-02-19 17:17:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:59,940 INFO L480 AbstractCegarLoop]: Abstraction has 11043 states and 28780 transitions. [2021-02-19 17:17:59,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:59,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11043 states and 28780 transitions. [2021-02-19 17:17:59,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:17:59,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:59,948 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:00,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-02-19 17:18:00,148 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash -136767289, now seen corresponding path program 58 times [2021-02-19 17:18:00,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:00,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994787003] [2021-02-19 17:18:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:00,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994787003] [2021-02-19 17:18:00,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864562335] [2021-02-19 17:18:00,205 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:00,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:00,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:00,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:00,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:00,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:18:00,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930585507] [2021-02-19 17:18:00,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:00,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:00,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:00,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:00,307 INFO L87 Difference]: Start difference. First operand 11043 states and 28780 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:00,489 INFO L93 Difference]: Finished difference Result 13070 states and 32866 transitions. [2021-02-19 17:18:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-02-19 17:18:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:00,509 INFO L225 Difference]: With dead ends: 13070 [2021-02-19 17:18:00,509 INFO L226 Difference]: Without dead ends: 13050 [2021-02-19 17:18:00,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13050 states. [2021-02-19 17:18:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13050 to 11210. [2021-02-19 17:18:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11210 states, 11209 states have (on average 2.608707288785797) internal successors, (29241), 11209 states have internal predecessors, (29241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11210 states to 11210 states and 29241 transitions. [2021-02-19 17:18:00,707 INFO L78 Accepts]: Start accepts. Automaton has 11210 states and 29241 transitions. Word has length 47 [2021-02-19 17:18:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:00,707 INFO L480 AbstractCegarLoop]: Abstraction has 11210 states and 29241 transitions. [2021-02-19 17:18:00,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 11210 states and 29241 transitions. [2021-02-19 17:18:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:00,716 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:00,716 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:00,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:00,916 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2132517764, now seen corresponding path program 105 times [2021-02-19 17:18:00,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:00,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183612311] [2021-02-19 17:18:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:00,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183612311] [2021-02-19 17:18:00,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823928561] [2021-02-19 17:18:00,996 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:01,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:18:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:01,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:01,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:01,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:18:01,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030385134] [2021-02-19 17:18:01,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:01,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:01,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:01,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:01,101 INFO L87 Difference]: Start difference. First operand 11210 states and 29241 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:01,614 INFO L93 Difference]: Finished difference Result 13279 states and 33558 transitions. [2021-02-19 17:18:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:18:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:01,631 INFO L225 Difference]: With dead ends: 13279 [2021-02-19 17:18:01,631 INFO L226 Difference]: Without dead ends: 13237 [2021-02-19 17:18:01,631 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:01,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13237 states. [2021-02-19 17:18:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13237 to 11266. [2021-02-19 17:18:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11266 states, 11265 states have (on average 2.6093209054593873) internal successors, (29394), 11265 states have internal predecessors, (29394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11266 states to 11266 states and 29394 transitions. [2021-02-19 17:18:01,801 INFO L78 Accepts]: Start accepts. Automaton has 11266 states and 29394 transitions. Word has length 47 [2021-02-19 17:18:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:01,801 INFO L480 AbstractCegarLoop]: Abstraction has 11266 states and 29394 transitions. [2021-02-19 17:18:01,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11266 states and 29394 transitions. [2021-02-19 17:18:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:01,808 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:01,808 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:02,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:02,008 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:02,009 INFO L82 PathProgramCache]: Analyzing trace with hash -599958655, now seen corresponding path program 106 times [2021-02-19 17:18:02,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:02,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436225379] [2021-02-19 17:18:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:02,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436225379] [2021-02-19 17:18:02,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907214019] [2021-02-19 17:18:02,084 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:02,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:02,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:02,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:02,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:02,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:02,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:18:02,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126814621] [2021-02-19 17:18:02,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:02,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:02,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:02,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:02,186 INFO L87 Difference]: Start difference. First operand 11266 states and 29394 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:02,409 INFO L93 Difference]: Finished difference Result 12930 states and 32620 transitions. [2021-02-19 17:18:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:02,426 INFO L225 Difference]: With dead ends: 12930 [2021-02-19 17:18:02,426 INFO L226 Difference]: Without dead ends: 12906 [2021-02-19 17:18:02,426 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12906 states. [2021-02-19 17:18:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12906 to 11030. [2021-02-19 17:18:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11030 states, 11029 states have (on average 2.6018678030646476) internal successors, (28696), 11029 states have internal predecessors, (28696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 28696 transitions. [2021-02-19 17:18:02,592 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 28696 transitions. Word has length 47 [2021-02-19 17:18:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:02,592 INFO L480 AbstractCegarLoop]: Abstraction has 11030 states and 28696 transitions. [2021-02-19 17:18:02,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 28696 transitions. [2021-02-19 17:18:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:02,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:02,600 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:02,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-02-19 17:18:02,800 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1977681230, now seen corresponding path program 107 times [2021-02-19 17:18:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:02,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707294818] [2021-02-19 17:18:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:02,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707294818] [2021-02-19 17:18:02,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28485313] [2021-02-19 17:18:02,883 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:02,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:18:02,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:02,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:02,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:02,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:18:02,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134835154] [2021-02-19 17:18:02,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:02,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:02,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:02,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:02,985 INFO L87 Difference]: Start difference. First operand 11030 states and 28696 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:03,503 INFO L93 Difference]: Finished difference Result 13230 states and 33203 transitions. [2021-02-19 17:18:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:18:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:03,520 INFO L225 Difference]: With dead ends: 13230 [2021-02-19 17:18:03,520 INFO L226 Difference]: Without dead ends: 13176 [2021-02-19 17:18:03,520 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13176 states. [2021-02-19 17:18:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13176 to 11010. [2021-02-19 17:18:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11010 states, 11009 states have (on average 2.5991461531474247) internal successors, (28614), 11009 states have internal predecessors, (28614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11010 states to 11010 states and 28614 transitions. [2021-02-19 17:18:03,707 INFO L78 Accepts]: Start accepts. Automaton has 11010 states and 28614 transitions. Word has length 47 [2021-02-19 17:18:03,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:03,707 INFO L480 AbstractCegarLoop]: Abstraction has 11010 states and 28614 transitions. [2021-02-19 17:18:03,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 11010 states and 28614 transitions. [2021-02-19 17:18:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:03,715 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:03,715 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:03,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:03,915 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:03,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1457344139, now seen corresponding path program 59 times [2021-02-19 17:18:03,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:03,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547581352] [2021-02-19 17:18:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:03,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547581352] [2021-02-19 17:18:03,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307731211] [2021-02-19 17:18:03,973 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:04,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 17:18:04,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:04,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:04,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 17 [2021-02-19 17:18:04,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236548941] [2021-02-19 17:18:04,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:04,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:04,154 INFO L87 Difference]: Start difference. First operand 11010 states and 28614 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:04,543 INFO L93 Difference]: Finished difference Result 16122 states and 40042 transitions. [2021-02-19 17:18:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:18:04,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:04,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:04,561 INFO L225 Difference]: With dead ends: 16122 [2021-02-19 17:18:04,562 INFO L226 Difference]: Without dead ends: 16122 [2021-02-19 17:18:04,562 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16122 states. [2021-02-19 17:18:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16122 to 11196. [2021-02-19 17:18:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11196 states, 11195 states have (on average 2.6068780705672174) internal successors, (29184), 11195 states have internal predecessors, (29184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11196 states to 11196 states and 29184 transitions. [2021-02-19 17:18:04,740 INFO L78 Accepts]: Start accepts. Automaton has 11196 states and 29184 transitions. Word has length 47 [2021-02-19 17:18:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:04,740 INFO L480 AbstractCegarLoop]: Abstraction has 11196 states and 29184 transitions. [2021-02-19 17:18:04,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 11196 states and 29184 transitions. [2021-02-19 17:18:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:04,747 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:04,747 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:04,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-02-19 17:18:04,948 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash -180228317, now seen corresponding path program 60 times [2021-02-19 17:18:04,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:04,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390988392] [2021-02-19 17:18:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:05,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390988392] [2021-02-19 17:18:05,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610475128] [2021-02-19 17:18:05,015 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:05,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 17:18:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:05,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:05,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:18:05,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262973514] [2021-02-19 17:18:05,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:05,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:05,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:05,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:05,131 INFO L87 Difference]: Start difference. First operand 11196 states and 29184 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) [2021-02-19 17:18:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:05,414 INFO L93 Difference]: Finished difference Result 15167 states and 37748 transitions. [2021-02-19 17:18:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:05,414 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 47 [2021-02-19 17:18:05,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:05,434 INFO L225 Difference]: With dead ends: 15167 [2021-02-19 17:18:05,434 INFO L226 Difference]: Without dead ends: 15167 [2021-02-19 17:18:05,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:18:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15167 states. [2021-02-19 17:18:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15167 to 11204. [2021-02-19 17:18:05,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11204 states, 11203 states have (on average 2.6068017495313756) internal successors, (29204), 11203 states have internal predecessors, (29204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11204 states to 11204 states and 29204 transitions. [2021-02-19 17:18:05,631 INFO L78 Accepts]: Start accepts. Automaton has 11204 states and 29204 transitions. Word has length 47 [2021-02-19 17:18:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:05,631 INFO L480 AbstractCegarLoop]: Abstraction has 11204 states and 29204 transitions. [2021-02-19 17:18:05,631 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) [2021-02-19 17:18:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 11204 states and 29204 transitions. [2021-02-19 17:18:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:05,638 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:05,639 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:05,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-02-19 17:18:05,839 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1870223481, now seen corresponding path program 61 times [2021-02-19 17:18:05,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:05,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691895196] [2021-02-19 17:18:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:05,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691895196] [2021-02-19 17:18:05,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068151527] [2021-02-19 17:18:05,914 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:05,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:05,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:06,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:06,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:18:06,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572018774] [2021-02-19 17:18:06,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:06,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:06,063 INFO L87 Difference]: Start difference. First operand 11204 states and 29204 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:18:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:06,349 INFO L93 Difference]: Finished difference Result 13730 states and 34377 transitions. [2021-02-19 17:18:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:18:06,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 47 [2021-02-19 17:18:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:06,366 INFO L225 Difference]: With dead ends: 13730 [2021-02-19 17:18:06,366 INFO L226 Difference]: Without dead ends: 13730 [2021-02-19 17:18:06,366 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13730 states. [2021-02-19 17:18:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13730 to 11017. [2021-02-19 17:18:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11017 states, 11016 states have (on average 2.605392156862745) internal successors, (28701), 11016 states have internal predecessors, (28701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11017 states to 11017 states and 28701 transitions. [2021-02-19 17:18:06,537 INFO L78 Accepts]: Start accepts. Automaton has 11017 states and 28701 transitions. Word has length 47 [2021-02-19 17:18:06,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:06,537 INFO L480 AbstractCegarLoop]: Abstraction has 11017 states and 28701 transitions. [2021-02-19 17:18:06,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:18:06,537 INFO L276 IsEmpty]: Start isEmpty. Operand 11017 states and 28701 transitions. [2021-02-19 17:18:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:06,545 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:06,545 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:06,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:06,746 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:06,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:06,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1591078553, now seen corresponding path program 108 times [2021-02-19 17:18:06,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:06,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518645966] [2021-02-19 17:18:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:06,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518645966] [2021-02-19 17:18:06,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838568605] [2021-02-19 17:18:06,819 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:06,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:18:06,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:06,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:06,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:18:06,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598515801] [2021-02-19 17:18:06,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:06,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:06,929 INFO L87 Difference]: Start difference. First operand 11017 states and 28701 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:07,139 INFO L93 Difference]: Finished difference Result 12484 states and 31576 transitions. [2021-02-19 17:18:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:07,140 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:07,154 INFO L225 Difference]: With dead ends: 12484 [2021-02-19 17:18:07,154 INFO L226 Difference]: Without dead ends: 12457 [2021-02-19 17:18:07,155 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:18:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12457 states. [2021-02-19 17:18:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12457 to 11017. [2021-02-19 17:18:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11017 states, 11016 states have (on average 2.604847494553377) internal successors, (28695), 11016 states have internal predecessors, (28695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11017 states to 11017 states and 28695 transitions. [2021-02-19 17:18:07,308 INFO L78 Accepts]: Start accepts. Automaton has 11017 states and 28695 transitions. Word has length 47 [2021-02-19 17:18:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:07,308 INFO L480 AbstractCegarLoop]: Abstraction has 11017 states and 28695 transitions. [2021-02-19 17:18:07,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 11017 states and 28695 transitions. [2021-02-19 17:18:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:07,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:07,316 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:07,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-02-19 17:18:07,516 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash 890204404, now seen corresponding path program 62 times [2021-02-19 17:18:07,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:07,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461632161] [2021-02-19 17:18:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:07,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461632161] [2021-02-19 17:18:07,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824616844] [2021-02-19 17:18:07,597 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:07,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:07,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:07,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:07,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:07,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:18:07,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523702702] [2021-02-19 17:18:07,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:07,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:07,702 INFO L87 Difference]: Start difference. First operand 11017 states and 28695 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:08,061 INFO L93 Difference]: Finished difference Result 12299 states and 31344 transitions. [2021-02-19 17:18:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:08,074 INFO L225 Difference]: With dead ends: 12299 [2021-02-19 17:18:08,075 INFO L226 Difference]: Without dead ends: 12272 [2021-02-19 17:18:08,075 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12272 states. [2021-02-19 17:18:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12272 to 11180. [2021-02-19 17:18:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 11179 states have (on average 2.60211110117184) internal successors, (29089), 11179 states have internal predecessors, (29089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 29089 transitions. [2021-02-19 17:18:08,229 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 29089 transitions. Word has length 47 [2021-02-19 17:18:08,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:08,229 INFO L480 AbstractCegarLoop]: Abstraction has 11180 states and 29089 transitions. [2021-02-19 17:18:08,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 29089 transitions. [2021-02-19 17:18:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:08,236 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:08,237 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:08,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:08,437 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash -663492453, now seen corresponding path program 109 times [2021-02-19 17:18:08,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:08,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401440242] [2021-02-19 17:18:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401440242] [2021-02-19 17:18:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890062144] [2021-02-19 17:18:08,499 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:08,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:08,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:08,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:08,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:18:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547134898] [2021-02-19 17:18:08,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:18:08,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:18:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:18:08,598 INFO L87 Difference]: Start difference. First operand 11180 states and 29089 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:08,748 INFO L93 Difference]: Finished difference Result 12853 states and 32381 transitions. [2021-02-19 17:18:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:18:08,748 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:08,765 INFO L225 Difference]: With dead ends: 12853 [2021-02-19 17:18:08,765 INFO L226 Difference]: Without dead ends: 12850 [2021-02-19 17:18:08,765 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12850 states. [2021-02-19 17:18:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12850 to 11172. [2021-02-19 17:18:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11172 states, 11171 states have (on average 2.6009309820069824) internal successors, (29055), 11171 states have internal predecessors, (29055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11172 states to 11172 states and 29055 transitions. [2021-02-19 17:18:08,940 INFO L78 Accepts]: Start accepts. Automaton has 11172 states and 29055 transitions. Word has length 47 [2021-02-19 17:18:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:08,940 INFO L480 AbstractCegarLoop]: Abstraction has 11172 states and 29055 transitions. [2021-02-19 17:18:08,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11172 states and 29055 transitions. [2021-02-19 17:18:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:08,947 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:08,947 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:09,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:09,148 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1904429900, now seen corresponding path program 110 times [2021-02-19 17:18:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:09,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311291203] [2021-02-19 17:18:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:09,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311291203] [2021-02-19 17:18:09,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207469386] [2021-02-19 17:18:09,220 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:09,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:09,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:09,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:09,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:09,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:09,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-02-19 17:18:09,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63048937] [2021-02-19 17:18:09,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:09,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:09,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:09,333 INFO L87 Difference]: Start difference. First operand 11172 states and 29055 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-02-19 17:18:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:09,805 INFO L93 Difference]: Finished difference Result 11857 states and 30318 transitions. [2021-02-19 17:18:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:09,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 47 [2021-02-19 17:18:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:09,820 INFO L225 Difference]: With dead ends: 11857 [2021-02-19 17:18:09,821 INFO L226 Difference]: Without dead ends: 11781 [2021-02-19 17:18:09,821 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11781 states. [2021-02-19 17:18:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11781 to 11141. [2021-02-19 17:18:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11141 states, 11140 states have (on average 2.5981149012567326) internal successors, (28943), 11140 states have internal predecessors, (28943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11141 states to 11141 states and 28943 transitions. [2021-02-19 17:18:09,979 INFO L78 Accepts]: Start accepts. Automaton has 11141 states and 28943 transitions. Word has length 47 [2021-02-19 17:18:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:09,979 INFO L480 AbstractCegarLoop]: Abstraction has 11141 states and 28943 transitions. [2021-02-19 17:18:09,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-02-19 17:18:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 11141 states and 28943 transitions. [2021-02-19 17:18:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:09,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:09,987 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:10,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:10,188 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1777001216, now seen corresponding path program 111 times [2021-02-19 17:18:10,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:10,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614717015] [2021-02-19 17:18:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:10,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614717015] [2021-02-19 17:18:10,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128846354] [2021-02-19 17:18:10,267 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:10,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-02-19 17:18:10,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:10,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:10,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:10,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:10,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:18:10,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464667226] [2021-02-19 17:18:10,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:10,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:10,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:10,372 INFO L87 Difference]: Start difference. First operand 11141 states and 28943 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:10,763 INFO L93 Difference]: Finished difference Result 12215 states and 31099 transitions. [2021-02-19 17:18:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:10,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:10,778 INFO L225 Difference]: With dead ends: 12215 [2021-02-19 17:18:10,778 INFO L226 Difference]: Without dead ends: 12170 [2021-02-19 17:18:10,778 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2021-02-19 17:18:10,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11129. [2021-02-19 17:18:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11129 states, 11128 states have (on average 2.598220704529116) internal successors, (28913), 11128 states have internal predecessors, (28913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 28913 transitions. [2021-02-19 17:18:10,955 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 28913 transitions. Word has length 47 [2021-02-19 17:18:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:10,955 INFO L480 AbstractCegarLoop]: Abstraction has 11129 states and 28913 transitions. [2021-02-19 17:18:10,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 28913 transitions. [2021-02-19 17:18:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:10,963 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:10,963 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:11,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-02-19 17:18:11,164 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:11,164 INFO L82 PathProgramCache]: Analyzing trace with hash 128643713, now seen corresponding path program 112 times [2021-02-19 17:18:11,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:11,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035487126] [2021-02-19 17:18:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:11,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035487126] [2021-02-19 17:18:11,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428098276] [2021-02-19 17:18:11,222 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:11,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:11,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:11,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:11,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:18:11,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461535156] [2021-02-19 17:18:11,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:11,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:11,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:11,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:11,337 INFO L87 Difference]: Start difference. First operand 11129 states and 28913 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:11,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:11,486 INFO L93 Difference]: Finished difference Result 12836 states and 32280 transitions. [2021-02-19 17:18:11,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:18:11,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:11,504 INFO L225 Difference]: With dead ends: 12836 [2021-02-19 17:18:11,504 INFO L226 Difference]: Without dead ends: 12827 [2021-02-19 17:18:11,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12827 states. [2021-02-19 17:18:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12827 to 11129. [2021-02-19 17:18:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11129 states, 11128 states have (on average 2.5973220704529116) internal successors, (28903), 11128 states have internal predecessors, (28903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 28903 transitions. [2021-02-19 17:18:11,696 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 28903 transitions. Word has length 47 [2021-02-19 17:18:11,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:11,696 INFO L480 AbstractCegarLoop]: Abstraction has 11129 states and 28903 transitions. [2021-02-19 17:18:11,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 28903 transitions. [2021-02-19 17:18:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:11,704 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:11,704 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:11,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-02-19 17:18:11,905 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash -376048746, now seen corresponding path program 113 times [2021-02-19 17:18:11,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:11,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503700318] [2021-02-19 17:18:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:11,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503700318] [2021-02-19 17:18:11,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021982006] [2021-02-19 17:18:11,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:12,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-02-19 17:18:12,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:12,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:12,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:12,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:12,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:18:12,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433770339] [2021-02-19 17:18:12,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:12,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:12,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:12,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:12,103 INFO L87 Difference]: Start difference. First operand 11129 states and 28903 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:12,611 INFO L93 Difference]: Finished difference Result 13386 states and 33648 transitions. [2021-02-19 17:18:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:18:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:12,628 INFO L225 Difference]: With dead ends: 13386 [2021-02-19 17:18:12,629 INFO L226 Difference]: Without dead ends: 13332 [2021-02-19 17:18:12,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13332 states. [2021-02-19 17:18:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13332 to 11225. [2021-02-19 17:18:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11225 states, 11224 states have (on average 2.598182466143977) internal successors, (29162), 11224 states have internal predecessors, (29162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11225 states to 11225 states and 29162 transitions. [2021-02-19 17:18:12,803 INFO L78 Accepts]: Start accepts. Automaton has 11225 states and 29162 transitions. Word has length 47 [2021-02-19 17:18:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:12,803 INFO L480 AbstractCegarLoop]: Abstraction has 11225 states and 29162 transitions. [2021-02-19 17:18:12,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 11225 states and 29162 transitions. [2021-02-19 17:18:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:12,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:12,811 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:13,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:13,011 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1156510363, now seen corresponding path program 114 times [2021-02-19 17:18:13,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:13,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054815188] [2021-02-19 17:18:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:13,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054815188] [2021-02-19 17:18:13,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953165389] [2021-02-19 17:18:13,077 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:13,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:18:13,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:13,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:13,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:13,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:18:13,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408028028] [2021-02-19 17:18:13,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:13,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:13,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:13,181 INFO L87 Difference]: Start difference. First operand 11225 states and 29162 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:13,372 INFO L93 Difference]: Finished difference Result 13001 states and 32659 transitions. [2021-02-19 17:18:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:18:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:13,390 INFO L225 Difference]: With dead ends: 13001 [2021-02-19 17:18:13,390 INFO L226 Difference]: Without dead ends: 12977 [2021-02-19 17:18:13,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12977 states. [2021-02-19 17:18:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12977 to 11225. [2021-02-19 17:18:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11225 states, 11224 states have (on average 2.596935138987883) internal successors, (29148), 11224 states have internal predecessors, (29148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11225 states to 11225 states and 29148 transitions. [2021-02-19 17:18:13,572 INFO L78 Accepts]: Start accepts. Automaton has 11225 states and 29148 transitions. Word has length 47 [2021-02-19 17:18:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:13,573 INFO L480 AbstractCegarLoop]: Abstraction has 11225 states and 29148 transitions. [2021-02-19 17:18:13,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 11225 states and 29148 transitions. [2021-02-19 17:18:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:13,581 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:13,581 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:13,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-02-19 17:18:13,781 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash -221212212, now seen corresponding path program 115 times [2021-02-19 17:18:13,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:13,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37766432] [2021-02-19 17:18:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:13,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37766432] [2021-02-19 17:18:13,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778906934] [2021-02-19 17:18:13,868 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:13,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:13,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:13,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:13,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:18:13,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055882104] [2021-02-19 17:18:13,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:13,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:13,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:13,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:13,972 INFO L87 Difference]: Start difference. First operand 11225 states and 29148 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:14,705 INFO L93 Difference]: Finished difference Result 15144 states and 37565 transitions. [2021-02-19 17:18:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 17:18:14,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:14,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:14,723 INFO L225 Difference]: With dead ends: 15144 [2021-02-19 17:18:14,723 INFO L226 Difference]: Without dead ends: 15030 [2021-02-19 17:18:14,723 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:18:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15030 states. [2021-02-19 17:18:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15030 to 11322. [2021-02-19 17:18:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 2.5982687041780763) internal successors, (29415), 11321 states have internal predecessors, (29415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 29415 transitions. [2021-02-19 17:18:14,910 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 29415 transitions. Word has length 47 [2021-02-19 17:18:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:14,910 INFO L480 AbstractCegarLoop]: Abstraction has 11322 states and 29415 transitions. [2021-02-19 17:18:14,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:14,910 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 29415 transitions. [2021-02-19 17:18:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:14,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:14,918 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:15,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:15,118 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:15,118 INFO L82 PathProgramCache]: Analyzing trace with hash 165390465, now seen corresponding path program 116 times [2021-02-19 17:18:15,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:15,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091717211] [2021-02-19 17:18:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:15,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091717211] [2021-02-19 17:18:15,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286888701] [2021-02-19 17:18:15,193 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:15,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:15,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:15,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:15,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:15,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:18:15,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840578352] [2021-02-19 17:18:15,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:15,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:15,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:15,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:15,297 INFO L87 Difference]: Start difference. First operand 11322 states and 29415 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:15,488 INFO L93 Difference]: Finished difference Result 13149 states and 33004 transitions. [2021-02-19 17:18:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:15,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:15,506 INFO L225 Difference]: With dead ends: 13149 [2021-02-19 17:18:15,506 INFO L226 Difference]: Without dead ends: 13116 [2021-02-19 17:18:15,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2021-02-19 17:18:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 11094. [2021-02-19 17:18:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.591724510952853) internal successors, (28750), 11093 states have internal predecessors, (28750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28750 transitions. [2021-02-19 17:18:15,681 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28750 transitions. Word has length 47 [2021-02-19 17:18:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:15,681 INFO L480 AbstractCegarLoop]: Abstraction has 11094 states and 28750 transitions. [2021-02-19 17:18:15,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28750 transitions. [2021-02-19 17:18:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:15,689 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:15,689 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:15,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:15,889 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash -280903722, now seen corresponding path program 117 times [2021-02-19 17:18:15,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:15,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538519325] [2021-02-19 17:18:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:15,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538519325] [2021-02-19 17:18:15,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969055416] [2021-02-19 17:18:15,994 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:16,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 17:18:16,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:16,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:16,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:16,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:16,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:18:16,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816183053] [2021-02-19 17:18:16,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:16,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:16,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:16,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:16,104 INFO L87 Difference]: Start difference. First operand 11094 states and 28750 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:16,669 INFO L93 Difference]: Finished difference Result 13895 states and 34477 transitions. [2021-02-19 17:18:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:18:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:16,688 INFO L225 Difference]: With dead ends: 13895 [2021-02-19 17:18:16,688 INFO L226 Difference]: Without dead ends: 13739 [2021-02-19 17:18:16,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:18:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-02-19 17:18:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 10883. [2021-02-19 17:18:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10883 states, 10882 states have (on average 2.5861054953133613) internal successors, (28142), 10882 states have internal predecessors, (28142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10883 states to 10883 states and 28142 transitions. [2021-02-19 17:18:16,855 INFO L78 Accepts]: Start accepts. Automaton has 10883 states and 28142 transitions. Word has length 47 [2021-02-19 17:18:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:16,855 INFO L480 AbstractCegarLoop]: Abstraction has 10883 states and 28142 transitions. [2021-02-19 17:18:16,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10883 states and 28142 transitions. [2021-02-19 17:18:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:16,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:16,863 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:17,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-02-19 17:18:17,064 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash -518965239, now seen corresponding path program 63 times [2021-02-19 17:18:17,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:17,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887357715] [2021-02-19 17:18:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:17,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887357715] [2021-02-19 17:18:17,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896426362] [2021-02-19 17:18:17,123 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:17,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 17:18:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:17,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:17,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:18:17,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006281237] [2021-02-19 17:18:17,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:17,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:17,232 INFO L87 Difference]: Start difference. First operand 10883 states and 28142 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:17,464 INFO L93 Difference]: Finished difference Result 12858 states and 32283 transitions. [2021-02-19 17:18:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:17,465 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-02-19 17:18:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:17,481 INFO L225 Difference]: With dead ends: 12858 [2021-02-19 17:18:17,481 INFO L226 Difference]: Without dead ends: 12842 [2021-02-19 17:18:17,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12842 states. [2021-02-19 17:18:17,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12842 to 11135. [2021-02-19 17:18:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11135 states, 11134 states have (on average 2.589994611101132) internal successors, (28837), 11134 states have internal predecessors, (28837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11135 states to 11135 states and 28837 transitions. [2021-02-19 17:18:17,669 INFO L78 Accepts]: Start accepts. Automaton has 11135 states and 28837 transitions. Word has length 47 [2021-02-19 17:18:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:17,669 INFO L480 AbstractCegarLoop]: Abstraction has 11135 states and 28837 transitions. [2021-02-19 17:18:17,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 11135 states and 28837 transitions. [2021-02-19 17:18:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:17,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:17,677 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:17,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:17,877 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1140845649, now seen corresponding path program 64 times [2021-02-19 17:18:17,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:17,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248944923] [2021-02-19 17:18:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:17,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248944923] [2021-02-19 17:18:17,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404860566] [2021-02-19 17:18:17,934 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:17,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:17,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:17,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:18,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:18,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:18:18,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797668539] [2021-02-19 17:18:18,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:18,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:18,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:18,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:18,052 INFO L87 Difference]: Start difference. First operand 11135 states and 28837 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:18,304 INFO L93 Difference]: Finished difference Result 15165 states and 37701 transitions. [2021-02-19 17:18:18,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-02-19 17:18:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:18,324 INFO L225 Difference]: With dead ends: 15165 [2021-02-19 17:18:18,324 INFO L226 Difference]: Without dead ends: 15165 [2021-02-19 17:18:18,324 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2021-02-19 17:18:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 11144. [2021-02-19 17:18:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11144 states, 11143 states have (on average 2.590325765054294) internal successors, (28864), 11143 states have internal predecessors, (28864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 28864 transitions. [2021-02-19 17:18:18,516 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 28864 transitions. Word has length 47 [2021-02-19 17:18:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:18,517 INFO L480 AbstractCegarLoop]: Abstraction has 11144 states and 28864 transitions. [2021-02-19 17:18:18,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 28864 transitions. [2021-02-19 17:18:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:18,525 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:18,525 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:18,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-02-19 17:18:18,725 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1516549191, now seen corresponding path program 65 times [2021-02-19 17:18:18,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:18,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332487308] [2021-02-19 17:18:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:18,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332487308] [2021-02-19 17:18:18,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096609862] [2021-02-19 17:18:18,794 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:18,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:18:18,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:18,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:18,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:18,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 19 [2021-02-19 17:18:18,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670332436] [2021-02-19 17:18:18,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:18:18,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:18,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:18:18,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:18:18,986 INFO L87 Difference]: Start difference. First operand 11144 states and 28864 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:19,515 INFO L93 Difference]: Finished difference Result 16556 states and 40982 transitions. [2021-02-19 17:18:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:18:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:19,538 INFO L225 Difference]: With dead ends: 16556 [2021-02-19 17:18:19,538 INFO L226 Difference]: Without dead ends: 16556 [2021-02-19 17:18:19,538 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=369, Invalid=623, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:18:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-02-19 17:18:19,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 11167. [2021-02-19 17:18:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11167 states, 11166 states have (on average 2.5914382948235715) internal successors, (28936), 11166 states have internal predecessors, (28936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11167 states to 11167 states and 28936 transitions. [2021-02-19 17:18:19,738 INFO L78 Accepts]: Start accepts. Automaton has 11167 states and 28936 transitions. Word has length 47 [2021-02-19 17:18:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:19,738 INFO L480 AbstractCegarLoop]: Abstraction has 11167 states and 28936 transitions. [2021-02-19 17:18:19,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 11167 states and 28936 transitions. [2021-02-19 17:18:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:19,745 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:19,746 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:19,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:19,946 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:19,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash -173445973, now seen corresponding path program 66 times [2021-02-19 17:18:19,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:19,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456261550] [2021-02-19 17:18:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:20,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456261550] [2021-02-19 17:18:20,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267865475] [2021-02-19 17:18:20,024 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:20,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-02-19 17:18:20,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:20,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:20,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:18:20,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426887624] [2021-02-19 17:18:20,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:20,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:20,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:20,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:20,136 INFO L87 Difference]: Start difference. First operand 11167 states and 28936 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:18:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:20,467 INFO L93 Difference]: Finished difference Result 14888 states and 37060 transitions. [2021-02-19 17:18:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:18:20,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 47 [2021-02-19 17:18:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:20,487 INFO L225 Difference]: With dead ends: 14888 [2021-02-19 17:18:20,487 INFO L226 Difference]: Without dead ends: 14888 [2021-02-19 17:18:20,487 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2021-02-19 17:18:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 11184. [2021-02-19 17:18:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11184 states, 11183 states have (on average 2.591969954395064) internal successors, (28986), 11183 states have internal predecessors, (28986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11184 states to 11184 states and 28986 transitions. [2021-02-19 17:18:20,683 INFO L78 Accepts]: Start accepts. Automaton has 11184 states and 28986 transitions. Word has length 47 [2021-02-19 17:18:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:20,683 INFO L480 AbstractCegarLoop]: Abstraction has 11184 states and 28986 transitions. [2021-02-19 17:18:20,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:18:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 11184 states and 28986 transitions. [2021-02-19 17:18:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:20,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:20,690 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:20,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-02-19 17:18:20,890 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:20,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1212732985, now seen corresponding path program 67 times [2021-02-19 17:18:20,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:20,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270214574] [2021-02-19 17:18:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:20,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270214574] [2021-02-19 17:18:20,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756813050] [2021-02-19 17:18:20,978 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:20,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:20,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:21,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:21,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:18:21,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957809874] [2021-02-19 17:18:21,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:21,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:21,086 INFO L87 Difference]: Start difference. First operand 11184 states and 28986 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2021-02-19 17:18:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:21,450 INFO L93 Difference]: Finished difference Result 13391 states and 33516 transitions. [2021-02-19 17:18:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 47 [2021-02-19 17:18:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:21,469 INFO L225 Difference]: With dead ends: 13391 [2021-02-19 17:18:21,469 INFO L226 Difference]: Without dead ends: 13391 [2021-02-19 17:18:21,469 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13391 states. [2021-02-19 17:18:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13391 to 10817. [2021-02-19 17:18:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10817 states, 10816 states have (on average 2.58801775147929) internal successors, (27992), 10816 states have internal predecessors, (27992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10817 states to 10817 states and 27992 transitions. [2021-02-19 17:18:21,637 INFO L78 Accepts]: Start accepts. Automaton has 10817 states and 27992 transitions. Word has length 47 [2021-02-19 17:18:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:21,637 INFO L480 AbstractCegarLoop]: Abstraction has 10817 states and 27992 transitions. [2021-02-19 17:18:21,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2021-02-19 17:18:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 10817 states and 27992 transitions. [2021-02-19 17:18:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:21,644 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:21,644 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:21,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:21,845 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1612669147, now seen corresponding path program 118 times [2021-02-19 17:18:21,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:21,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112560356] [2021-02-19 17:18:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112560356] [2021-02-19 17:18:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011010116] [2021-02-19 17:18:21,932 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:21,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:22,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:22,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:18:22,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351763984] [2021-02-19 17:18:22,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:22,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:22,036 INFO L87 Difference]: Start difference. First operand 10817 states and 27992 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:22,247 INFO L93 Difference]: Finished difference Result 12350 states and 31045 transitions. [2021-02-19 17:18:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:22,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:22,264 INFO L225 Difference]: With dead ends: 12350 [2021-02-19 17:18:22,264 INFO L226 Difference]: Without dead ends: 12314 [2021-02-19 17:18:22,264 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:18:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12314 states. [2021-02-19 17:18:22,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12314 to 10817. [2021-02-19 17:18:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10817 states, 10816 states have (on average 2.5874630177514795) internal successors, (27986), 10816 states have internal predecessors, (27986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10817 states to 10817 states and 27986 transitions. [2021-02-19 17:18:22,424 INFO L78 Accepts]: Start accepts. Automaton has 10817 states and 27986 transitions. Word has length 47 [2021-02-19 17:18:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:22,424 INFO L480 AbstractCegarLoop]: Abstraction has 10817 states and 27986 transitions. [2021-02-19 17:18:22,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10817 states and 27986 transitions. [2021-02-19 17:18:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:22,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:22,431 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:22,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:22,631 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:22,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2022814822, now seen corresponding path program 68 times [2021-02-19 17:18:22,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:22,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179099801] [2021-02-19 17:18:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:22,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179099801] [2021-02-19 17:18:22,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756530412] [2021-02-19 17:18:22,714 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:22,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:22,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:22,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:22,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:18:22,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67094970] [2021-02-19 17:18:22,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:22,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:22,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:22,816 INFO L87 Difference]: Start difference. First operand 10817 states and 27986 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:23,202 INFO L93 Difference]: Finished difference Result 11869 states and 30137 transitions. [2021-02-19 17:18:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:23,218 INFO L225 Difference]: With dead ends: 11869 [2021-02-19 17:18:23,218 INFO L226 Difference]: Without dead ends: 11852 [2021-02-19 17:18:23,218 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11852 states. [2021-02-19 17:18:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11852 to 10948. [2021-02-19 17:18:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10948 states, 10947 states have (on average 2.5845437106056455) internal successors, (28293), 10947 states have internal predecessors, (28293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10948 states to 10948 states and 28293 transitions. [2021-02-19 17:18:23,400 INFO L78 Accepts]: Start accepts. Automaton has 10948 states and 28293 transitions. Word has length 47 [2021-02-19 17:18:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:23,400 INFO L480 AbstractCegarLoop]: Abstraction has 10948 states and 28293 transitions. [2021-02-19 17:18:23,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10948 states and 28293 transitions. [2021-02-19 17:18:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:23,407 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:23,408 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:23,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-02-19 17:18:23,608 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash 925518183, now seen corresponding path program 119 times [2021-02-19 17:18:23,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:23,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882148159] [2021-02-19 17:18:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:23,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882148159] [2021-02-19 17:18:23,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137951103] [2021-02-19 17:18:23,667 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:23,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:18:23,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:23,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:23,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-02-19 17:18:23,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572068620] [2021-02-19 17:18:23,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:23,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:23,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:23,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:23,790 INFO L87 Difference]: Start difference. First operand 10948 states and 28293 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:23,984 INFO L93 Difference]: Finished difference Result 12917 states and 32220 transitions. [2021-02-19 17:18:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:23,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:24,000 INFO L225 Difference]: With dead ends: 12917 [2021-02-19 17:18:24,000 INFO L226 Difference]: Without dead ends: 12899 [2021-02-19 17:18:24,000 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:18:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12899 states. [2021-02-19 17:18:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12899 to 10948. [2021-02-19 17:18:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10948 states, 10947 states have (on average 2.582808075271764) internal successors, (28274), 10947 states have internal predecessors, (28274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10948 states to 10948 states and 28274 transitions. [2021-02-19 17:18:24,159 INFO L78 Accepts]: Start accepts. Automaton has 10948 states and 28274 transitions. Word has length 47 [2021-02-19 17:18:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:24,159 INFO L480 AbstractCegarLoop]: Abstraction has 10948 states and 28274 transitions. [2021-02-19 17:18:24,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 10948 states and 28274 transitions. [2021-02-19 17:18:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:24,166 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:24,166 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:24,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-02-19 17:18:24,368 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:24,368 INFO L82 PathProgramCache]: Analyzing trace with hash -522481830, now seen corresponding path program 120 times [2021-02-19 17:18:24,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:24,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230682203] [2021-02-19 17:18:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:24,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230682203] [2021-02-19 17:18:24,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131482327] [2021-02-19 17:18:24,440 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:24,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-02-19 17:18:24,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:24,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:24,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:24,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:24,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-02-19 17:18:24,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921345812] [2021-02-19 17:18:24,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:24,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:24,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:24,558 INFO L87 Difference]: Start difference. First operand 10948 states and 28274 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-02-19 17:18:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:25,039 INFO L93 Difference]: Finished difference Result 11576 states and 29427 transitions. [2021-02-19 17:18:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 47 [2021-02-19 17:18:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:25,054 INFO L225 Difference]: With dead ends: 11576 [2021-02-19 17:18:25,054 INFO L226 Difference]: Without dead ends: 11482 [2021-02-19 17:18:25,054 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-02-19 17:18:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 10887. [2021-02-19 17:18:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10887 states, 10886 states have (on average 2.5807459121807828) internal successors, (28094), 10886 states have internal predecessors, (28094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10887 states to 10887 states and 28094 transitions. [2021-02-19 17:18:25,223 INFO L78 Accepts]: Start accepts. Automaton has 10887 states and 28094 transitions. Word has length 47 [2021-02-19 17:18:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:25,223 INFO L480 AbstractCegarLoop]: Abstraction has 10887 states and 28094 transitions. [2021-02-19 17:18:25,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-02-19 17:18:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 10887 states and 28094 transitions. [2021-02-19 17:18:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:25,231 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:25,231 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:25,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-02-19 17:18:25,432 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:25,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1136018010, now seen corresponding path program 121 times [2021-02-19 17:18:25,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:25,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698007628] [2021-02-19 17:18:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:25,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698007628] [2021-02-19 17:18:25,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095432230] [2021-02-19 17:18:25,522 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:25,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:25,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:25,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:18:25,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630254416] [2021-02-19 17:18:25,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:25,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:25,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:25,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:25,629 INFO L87 Difference]: Start difference. First operand 10887 states and 28094 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:26,019 INFO L93 Difference]: Finished difference Result 11955 states and 30249 transitions. [2021-02-19 17:18:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:26,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:26,034 INFO L225 Difference]: With dead ends: 11955 [2021-02-19 17:18:26,034 INFO L226 Difference]: Without dead ends: 11901 [2021-02-19 17:18:26,035 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11901 states. [2021-02-19 17:18:26,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11901 to 10911. [2021-02-19 17:18:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10911 states, 10910 states have (on average 2.5808432630614115) internal successors, (28157), 10910 states have internal predecessors, (28157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10911 states to 10911 states and 28157 transitions. [2021-02-19 17:18:26,249 INFO L78 Accepts]: Start accepts. Automaton has 10911 states and 28157 transitions. Word has length 47 [2021-02-19 17:18:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:26,249 INFO L480 AbstractCegarLoop]: Abstraction has 10911 states and 28157 transitions. [2021-02-19 17:18:26,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 10911 states and 28157 transitions. [2021-02-19 17:18:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:26,256 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:26,256 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:26,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-02-19 17:18:26,457 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1293317497, now seen corresponding path program 69 times [2021-02-19 17:18:26,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:26,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758077970] [2021-02-19 17:18:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:26,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758077970] [2021-02-19 17:18:26,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031671370] [2021-02-19 17:18:26,515 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:26,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 17:18:26,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:26,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:26,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:18:26,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591697693] [2021-02-19 17:18:26,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:26,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:26,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:26,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:26,631 INFO L87 Difference]: Start difference. First operand 10911 states and 28157 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:26,849 INFO L93 Difference]: Finished difference Result 12496 states and 31409 transitions. [2021-02-19 17:18:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:26,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-02-19 17:18:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:26,864 INFO L225 Difference]: With dead ends: 12496 [2021-02-19 17:18:26,864 INFO L226 Difference]: Without dead ends: 12476 [2021-02-19 17:18:26,864 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12476 states. [2021-02-19 17:18:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12476 to 10514. [2021-02-19 17:18:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10514 states, 10513 states have (on average 2.5682488347759915) internal successors, (27000), 10513 states have internal predecessors, (27000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10514 states to 10514 states and 27000 transitions. [2021-02-19 17:18:27,014 INFO L78 Accepts]: Start accepts. Automaton has 10514 states and 27000 transitions. Word has length 47 [2021-02-19 17:18:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:27,014 INFO L480 AbstractCegarLoop]: Abstraction has 10514 states and 27000 transitions. [2021-02-19 17:18:27,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 10514 states and 27000 transitions. [2021-02-19 17:18:27,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:27,021 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:27,021 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:27,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-02-19 17:18:27,222 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:27,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:27,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1005899324, now seen corresponding path program 122 times [2021-02-19 17:18:27,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:27,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632077761] [2021-02-19 17:18:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:27,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632077761] [2021-02-19 17:18:27,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879364763] [2021-02-19 17:18:27,297 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:27,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:27,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:27,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:27,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:27,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:27,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:18:27,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764227203] [2021-02-19 17:18:27,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:27,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:27,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:27,397 INFO L87 Difference]: Start difference. First operand 10514 states and 27000 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:27,935 INFO L93 Difference]: Finished difference Result 12649 states and 31460 transitions. [2021-02-19 17:18:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:18:27,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:27,951 INFO L225 Difference]: With dead ends: 12649 [2021-02-19 17:18:27,952 INFO L226 Difference]: Without dead ends: 12595 [2021-02-19 17:18:27,952 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:18:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2021-02-19 17:18:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 10614. [2021-02-19 17:18:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10614 states, 10613 states have (on average 2.5693017996796383) internal successors, (27268), 10613 states have internal predecessors, (27268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10614 states to 10614 states and 27268 transitions. [2021-02-19 17:18:28,117 INFO L78 Accepts]: Start accepts. Automaton has 10614 states and 27268 transitions. Word has length 47 [2021-02-19 17:18:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:28,117 INFO L480 AbstractCegarLoop]: Abstraction has 10614 states and 27268 transitions. [2021-02-19 17:18:28,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 10614 states and 27268 transitions. [2021-02-19 17:18:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:28,125 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:28,125 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:28,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:28,326 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1756508863, now seen corresponding path program 123 times [2021-02-19 17:18:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:28,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815342103] [2021-02-19 17:18:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:28,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815342103] [2021-02-19 17:18:28,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674295593] [2021-02-19 17:18:28,395 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:28,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:18:28,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:28,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:28,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:18:28,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74292178] [2021-02-19 17:18:28,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:28,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:28,501 INFO L87 Difference]: Start difference. First operand 10614 states and 27268 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:28,685 INFO L93 Difference]: Finished difference Result 12531 states and 31060 transitions. [2021-02-19 17:18:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:28,703 INFO L225 Difference]: With dead ends: 12531 [2021-02-19 17:18:28,703 INFO L226 Difference]: Without dead ends: 12507 [2021-02-19 17:18:28,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12507 states. [2021-02-19 17:18:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12507 to 10614. [2021-02-19 17:18:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10614 states, 10613 states have (on average 2.5682653349665503) internal successors, (27257), 10613 states have internal predecessors, (27257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10614 states to 10614 states and 27257 transitions. [2021-02-19 17:18:28,869 INFO L78 Accepts]: Start accepts. Automaton has 10614 states and 27257 transitions. Word has length 47 [2021-02-19 17:18:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:28,869 INFO L480 AbstractCegarLoop]: Abstraction has 10614 states and 27257 transitions. [2021-02-19 17:18:28,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 10614 states and 27257 transitions. [2021-02-19 17:18:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:28,877 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:28,877 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:29,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-02-19 17:18:29,077 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1160735858, now seen corresponding path program 124 times [2021-02-19 17:18:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:29,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78236247] [2021-02-19 17:18:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:29,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78236247] [2021-02-19 17:18:29,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390593128] [2021-02-19 17:18:29,180 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:29,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:29,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:29,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:29,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:29,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:18:29,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625081365] [2021-02-19 17:18:29,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:29,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:29,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:29,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:29,330 INFO L87 Difference]: Start difference. First operand 10614 states and 27257 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:30,148 INFO L93 Difference]: Finished difference Result 15368 states and 37360 transitions. [2021-02-19 17:18:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 17:18:30,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:30,167 INFO L225 Difference]: With dead ends: 15368 [2021-02-19 17:18:30,167 INFO L226 Difference]: Without dead ends: 15188 [2021-02-19 17:18:30,168 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:18:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2021-02-19 17:18:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 10820. [2021-02-19 17:18:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10820 states, 10819 states have (on average 2.568906553285886) internal successors, (27793), 10819 states have internal predecessors, (27793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10820 states to 10820 states and 27793 transitions. [2021-02-19 17:18:30,350 INFO L78 Accepts]: Start accepts. Automaton has 10820 states and 27793 transitions. Word has length 47 [2021-02-19 17:18:30,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:30,350 INFO L480 AbstractCegarLoop]: Abstraction has 10820 states and 27793 transitions. [2021-02-19 17:18:30,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:30,351 INFO L276 IsEmpty]: Start isEmpty. Operand 10820 states and 27793 transitions. [2021-02-19 17:18:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:30,358 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:30,358 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:30,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:30,559 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1547338535, now seen corresponding path program 125 times [2021-02-19 17:18:30,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:30,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746941314] [2021-02-19 17:18:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:30,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746941314] [2021-02-19 17:18:30,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303987006] [2021-02-19 17:18:30,634 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:30,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:18:30,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:30,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:30,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:30,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:30,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-02-19 17:18:30,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403439064] [2021-02-19 17:18:30,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:18:30,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:18:30,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:30,766 INFO L87 Difference]: Start difference. First operand 10820 states and 27793 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2021-02-19 17:18:31,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:31,026 INFO L93 Difference]: Finished difference Result 13016 states and 32151 transitions. [2021-02-19 17:18:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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 47 [2021-02-19 17:18:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:31,046 INFO L225 Difference]: With dead ends: 13016 [2021-02-19 17:18:31,046 INFO L226 Difference]: Without dead ends: 12983 [2021-02-19 17:18:31,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12983 states. [2021-02-19 17:18:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12983 to 10820. [2021-02-19 17:18:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10820 states, 10819 states have (on average 2.568629263333025) internal successors, (27790), 10819 states have internal predecessors, (27790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10820 states to 10820 states and 27790 transitions. [2021-02-19 17:18:31,206 INFO L78 Accepts]: Start accepts. Automaton has 10820 states and 27790 transitions. Word has length 47 [2021-02-19 17:18:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:31,206 INFO L480 AbstractCegarLoop]: Abstraction has 10820 states and 27790 transitions. [2021-02-19 17:18:31,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2021-02-19 17:18:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 10820 states and 27790 transitions. [2021-02-19 17:18:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:31,213 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:31,213 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:31,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:31,414 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:31,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1101044348, now seen corresponding path program 126 times [2021-02-19 17:18:31,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:31,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377595937] [2021-02-19 17:18:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:31,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377595937] [2021-02-19 17:18:31,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738661532] [2021-02-19 17:18:31,508 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:31,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-02-19 17:18:31,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:31,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:31,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:31,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:31,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:18:31,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426278644] [2021-02-19 17:18:31,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:31,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:31,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:31,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:31,612 INFO L87 Difference]: Start difference. First operand 10820 states and 27790 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:32,812 INFO L93 Difference]: Finished difference Result 17832 states and 42770 transitions. [2021-02-19 17:18:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 17:18:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:32,832 INFO L225 Difference]: With dead ends: 17832 [2021-02-19 17:18:32,832 INFO L226 Difference]: Without dead ends: 17556 [2021-02-19 17:18:32,832 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 17:18:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-02-19 17:18:32,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 11000. [2021-02-19 17:18:32,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11000 states, 10999 states have (on average 2.567778888989908) internal successors, (28243), 10999 states have internal predecessors, (28243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11000 states to 11000 states and 28243 transitions. [2021-02-19 17:18:33,010 INFO L78 Accepts]: Start accepts. Automaton has 11000 states and 28243 transitions. Word has length 47 [2021-02-19 17:18:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:33,010 INFO L480 AbstractCegarLoop]: Abstraction has 11000 states and 28243 transitions. [2021-02-19 17:18:33,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 11000 states and 28243 transitions. [2021-02-19 17:18:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:33,017 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:33,017 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:33,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:33,218 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1300350079, now seen corresponding path program 127 times [2021-02-19 17:18:33,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:33,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531083748] [2021-02-19 17:18:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531083748] [2021-02-19 17:18:33,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667813426] [2021-02-19 17:18:33,307 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:33,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:33,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:33,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:18:33,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98446263] [2021-02-19 17:18:33,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:33,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:33,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:33,407 INFO L87 Difference]: Start difference. First operand 11000 states and 28243 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:33,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:33,642 INFO L93 Difference]: Finished difference Result 13147 states and 32469 transitions. [2021-02-19 17:18:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:18:33,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:33,660 INFO L225 Difference]: With dead ends: 13147 [2021-02-19 17:18:33,660 INFO L226 Difference]: Without dead ends: 13105 [2021-02-19 17:18:33,660 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13105 states. [2021-02-19 17:18:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13105 to 10785. [2021-02-19 17:18:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10784 states have (on average 2.561758160237389) internal successors, (27626), 10784 states have internal predecessors, (27626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 27626 transitions. [2021-02-19 17:18:33,830 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 27626 transitions. Word has length 47 [2021-02-19 17:18:33,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:33,830 INFO L480 AbstractCegarLoop]: Abstraction has 10785 states and 27626 transitions. [2021-02-19 17:18:33,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 27626 transitions. [2021-02-19 17:18:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:33,838 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:33,838 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:34,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-02-19 17:18:34,038 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:34,038 INFO L82 PathProgramCache]: Analyzing trace with hash 947730482, now seen corresponding path program 128 times [2021-02-19 17:18:34,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:34,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584731483] [2021-02-19 17:18:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:34,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584731483] [2021-02-19 17:18:34,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312227871] [2021-02-19 17:18:34,140 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:34,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:34,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:34,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:34,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:34,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:34,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:18:34,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174035919] [2021-02-19 17:18:34,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:34,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:34,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:34,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:34,239 INFO L87 Difference]: Start difference. First operand 10785 states and 27626 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:34,818 INFO L93 Difference]: Finished difference Result 14592 states and 35347 transitions. [2021-02-19 17:18:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:34,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:34,836 INFO L225 Difference]: With dead ends: 14592 [2021-02-19 17:18:34,836 INFO L226 Difference]: Without dead ends: 14214 [2021-02-19 17:18:34,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:18:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14214 states. [2021-02-19 17:18:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14214 to 10145. [2021-02-19 17:18:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10145 states, 10144 states have (on average 2.5617113564668768) internal successors, (25986), 10144 states have internal predecessors, (25986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10145 states to 10145 states and 25986 transitions. [2021-02-19 17:18:35,001 INFO L78 Accepts]: Start accepts. Automaton has 10145 states and 25986 transitions. Word has length 47 [2021-02-19 17:18:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:35,001 INFO L480 AbstractCegarLoop]: Abstraction has 10145 states and 25986 transitions. [2021-02-19 17:18:35,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 10145 states and 25986 transitions. [2021-02-19 17:18:35,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:35,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:35,009 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:35,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-02-19 17:18:35,209 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash 87788555, now seen corresponding path program 70 times [2021-02-19 17:18:35,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:35,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365521293] [2021-02-19 17:18:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:35,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365521293] [2021-02-19 17:18:35,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748973732] [2021-02-19 17:18:35,269 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:35,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:35,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:35,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:35,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:35,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:35,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:18:35,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346322817] [2021-02-19 17:18:35,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:35,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:35,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:35,392 INFO L87 Difference]: Start difference. First operand 10145 states and 25986 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:35,665 INFO L93 Difference]: Finished difference Result 13552 states and 33367 transitions. [2021-02-19 17:18:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 47 [2021-02-19 17:18:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:35,682 INFO L225 Difference]: With dead ends: 13552 [2021-02-19 17:18:35,682 INFO L226 Difference]: Without dead ends: 13552 [2021-02-19 17:18:35,682 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:18:35,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13552 states. [2021-02-19 17:18:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13552 to 10331. [2021-02-19 17:18:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10331 states, 10330 states have (on average 2.5701839303000966) internal successors, (26550), 10330 states have internal predecessors, (26550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10331 states to 10331 states and 26550 transitions. [2021-02-19 17:18:35,835 INFO L78 Accepts]: Start accepts. Automaton has 10331 states and 26550 transitions. Word has length 47 [2021-02-19 17:18:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:35,835 INFO L480 AbstractCegarLoop]: Abstraction has 10331 states and 26550 transitions. [2021-02-19 17:18:35,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:18:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10331 states and 26550 transitions. [2021-02-19 17:18:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:35,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:35,841 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:36,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-02-19 17:18:36,042 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:36,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1549783901, now seen corresponding path program 71 times [2021-02-19 17:18:36,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:36,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027010027] [2021-02-19 17:18:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:36,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027010027] [2021-02-19 17:18:36,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114760175] [2021-02-19 17:18:36,110 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:36,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-02-19 17:18:36,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:36,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:36,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:36,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:36,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-02-19 17:18:36,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972609526] [2021-02-19 17:18:36,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:18:36,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:18:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:18:36,337 INFO L87 Difference]: Start difference. First operand 10331 states and 26550 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:37,146 INFO L93 Difference]: Finished difference Result 15153 states and 36953 transitions. [2021-02-19 17:18:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 17:18:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:37,164 INFO L225 Difference]: With dead ends: 15153 [2021-02-19 17:18:37,165 INFO L226 Difference]: Without dead ends: 15153 [2021-02-19 17:18:37,165 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=644, Invalid=1336, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 17:18:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15153 states. [2021-02-19 17:18:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15153 to 10347. [2021-02-19 17:18:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10347 states, 10346 states have (on average 2.570751981442103) internal successors, (26597), 10346 states have internal predecessors, (26597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10347 states to 10347 states and 26597 transitions. [2021-02-19 17:18:37,330 INFO L78 Accepts]: Start accepts. Automaton has 10347 states and 26597 transitions. Word has length 47 [2021-02-19 17:18:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:37,330 INFO L480 AbstractCegarLoop]: Abstraction has 10347 states and 26597 transitions. [2021-02-19 17:18:37,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 10347 states and 26597 transitions. [2021-02-19 17:18:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:37,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:37,337 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:37,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-02-19 17:18:37,537 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:37,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1055188231, now seen corresponding path program 72 times [2021-02-19 17:18:37,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:37,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868149031] [2021-02-19 17:18:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:37,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868149031] [2021-02-19 17:18:37,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693850696] [2021-02-19 17:18:37,615 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:37,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-02-19 17:18:37,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:37,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:37,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:18:37,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871163783] [2021-02-19 17:18:37,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:37,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:37,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:37,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:37,725 INFO L87 Difference]: Start difference. First operand 10347 states and 26597 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:18:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:38,118 INFO L93 Difference]: Finished difference Result 14271 states and 35050 transitions. [2021-02-19 17:18:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:38,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 47 [2021-02-19 17:18:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:38,136 INFO L225 Difference]: With dead ends: 14271 [2021-02-19 17:18:38,137 INFO L226 Difference]: Without dead ends: 14271 [2021-02-19 17:18:38,137 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14271 states. [2021-02-19 17:18:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14271 to 10370. [2021-02-19 17:18:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10370 states, 10369 states have (on average 2.5716076767287106) internal successors, (26665), 10369 states have internal predecessors, (26665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10370 states to 10370 states and 26665 transitions. [2021-02-19 17:18:38,314 INFO L78 Accepts]: Start accepts. Automaton has 10370 states and 26665 transitions. Word has length 47 [2021-02-19 17:18:38,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:38,314 INFO L480 AbstractCegarLoop]: Abstraction has 10370 states and 26665 transitions. [2021-02-19 17:18:38,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:18:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 10370 states and 26665 transitions. [2021-02-19 17:18:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:38,322 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:38,322 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:38,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-02-19 17:18:38,524 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:38,524 INFO L82 PathProgramCache]: Analyzing trace with hash 15901219, now seen corresponding path program 73 times [2021-02-19 17:18:38,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:38,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561798012] [2021-02-19 17:18:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561798012] [2021-02-19 17:18:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445608052] [2021-02-19 17:18:38,654 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:38,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:38,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:18:38,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200898564] [2021-02-19 17:18:38,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:38,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:38,773 INFO L87 Difference]: Start difference. First operand 10370 states and 26665 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2021-02-19 17:18:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:39,169 INFO L93 Difference]: Finished difference Result 13394 states and 33045 transitions. [2021-02-19 17:18:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:18:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 47 [2021-02-19 17:18:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:39,186 INFO L225 Difference]: With dead ends: 13394 [2021-02-19 17:18:39,186 INFO L226 Difference]: Without dead ends: 13394 [2021-02-19 17:18:39,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:18:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13394 states. [2021-02-19 17:18:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13394 to 10396. [2021-02-19 17:18:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10396 states, 10395 states have (on average 2.5725829725829725) internal successors, (26742), 10395 states have internal predecessors, (26742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10396 states to 10396 states and 26742 transitions. [2021-02-19 17:18:39,342 INFO L78 Accepts]: Start accepts. Automaton has 10396 states and 26742 transitions. Word has length 47 [2021-02-19 17:18:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:39,342 INFO L480 AbstractCegarLoop]: Abstraction has 10396 states and 26742 transitions. [2021-02-19 17:18:39,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2021-02-19 17:18:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 10396 states and 26742 transitions. [2021-02-19 17:18:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:39,349 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:39,349 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:39,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:39,549 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:39,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1035763591, now seen corresponding path program 74 times [2021-02-19 17:18:39,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:39,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758006088] [2021-02-19 17:18:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:39,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758006088] [2021-02-19 17:18:39,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535585097] [2021-02-19 17:18:39,657 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:39,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:39,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:39,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:39,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:39,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-02-19 17:18:39,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95285176] [2021-02-19 17:18:39,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:18:39,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:39,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:18:39,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:39,782 INFO L87 Difference]: Start difference. First operand 10396 states and 26742 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-02-19 17:18:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:40,198 INFO L93 Difference]: Finished difference Result 12224 states and 30379 transitions. [2021-02-19 17:18:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:40,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 47 [2021-02-19 17:18:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:40,213 INFO L225 Difference]: With dead ends: 12224 [2021-02-19 17:18:40,213 INFO L226 Difference]: Without dead ends: 12224 [2021-02-19 17:18:40,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12224 states. [2021-02-19 17:18:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12224 to 9933. [2021-02-19 17:18:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9933 states, 9932 states have (on average 2.5726943213854208) internal successors, (25552), 9932 states have internal predecessors, (25552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9933 states to 9933 states and 25552 transitions. [2021-02-19 17:18:40,367 INFO L78 Accepts]: Start accepts. Automaton has 9933 states and 25552 transitions. Word has length 47 [2021-02-19 17:18:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:40,367 INFO L480 AbstractCegarLoop]: Abstraction has 9933 states and 25552 transitions. [2021-02-19 17:18:40,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2021-02-19 17:18:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 9933 states and 25552 transitions. [2021-02-19 17:18:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:40,374 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:40,374 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:40,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-02-19 17:18:40,575 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1697148135, now seen corresponding path program 129 times [2021-02-19 17:18:40,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:40,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225373848] [2021-02-19 17:18:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225373848] [2021-02-19 17:18:40,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750454458] [2021-02-19 17:18:40,678 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:40,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:18:40,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:40,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:40,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:18:40,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21538099] [2021-02-19 17:18:40,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:40,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:40,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:40,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:40,793 INFO L87 Difference]: Start difference. First operand 9933 states and 25552 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:41,031 INFO L93 Difference]: Finished difference Result 11582 states and 28847 transitions. [2021-02-19 17:18:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:41,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:41,045 INFO L225 Difference]: With dead ends: 11582 [2021-02-19 17:18:41,046 INFO L226 Difference]: Without dead ends: 11537 [2021-02-19 17:18:41,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:18:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-02-19 17:18:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 9942. [2021-02-19 17:18:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9942 states, 9941 states have (on average 2.571874056935922) internal successors, (25567), 9941 states have internal predecessors, (25567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9942 states to 9942 states and 25567 transitions. [2021-02-19 17:18:41,196 INFO L78 Accepts]: Start accepts. Automaton has 9942 states and 25567 transitions. Word has length 47 [2021-02-19 17:18:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:41,196 INFO L480 AbstractCegarLoop]: Abstraction has 9942 states and 25567 transitions. [2021-02-19 17:18:41,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 9942 states and 25567 transitions. [2021-02-19 17:18:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:41,203 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:41,203 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:41,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:41,403 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1349917643, now seen corresponding path program 130 times [2021-02-19 17:18:41,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:41,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904035226] [2021-02-19 17:18:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:41,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904035226] [2021-02-19 17:18:41,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821579728] [2021-02-19 17:18:41,508 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:41,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:41,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:41,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:41,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:41,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:18:41,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959247675] [2021-02-19 17:18:41,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:41,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:41,653 INFO L87 Difference]: Start difference. First operand 9942 states and 25567 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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) [2021-02-19 17:18:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:42,075 INFO L93 Difference]: Finished difference Result 12326 states and 30897 transitions. [2021-02-19 17:18:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 47 [2021-02-19 17:18:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:42,092 INFO L225 Difference]: With dead ends: 12326 [2021-02-19 17:18:42,092 INFO L226 Difference]: Without dead ends: 12326 [2021-02-19 17:18:42,092 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12326 states. [2021-02-19 17:18:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12326 to 10210. [2021-02-19 17:18:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 2.59104711529043) internal successors, (26452), 10209 states have internal predecessors, (26452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 26452 transitions. [2021-02-19 17:18:42,252 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 26452 transitions. Word has length 47 [2021-02-19 17:18:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:42,253 INFO L480 AbstractCegarLoop]: Abstraction has 10210 states and 26452 transitions. [2021-02-19 17:18:42,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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) [2021-02-19 17:18:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 26452 transitions. [2021-02-19 17:18:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:42,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:42,260 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:42,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-02-19 17:18:42,474 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1627893940, now seen corresponding path program 75 times [2021-02-19 17:18:42,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:42,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429034000] [2021-02-19 17:18:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:42,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429034000] [2021-02-19 17:18:42,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898123358] [2021-02-19 17:18:42,586 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:42,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:18:42,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:42,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:42,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:42,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:42,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:18:42,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587089002] [2021-02-19 17:18:42,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:42,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:42,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:42,693 INFO L87 Difference]: Start difference. First operand 10210 states and 26452 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:43,226 INFO L93 Difference]: Finished difference Result 15408 states and 38231 transitions. [2021-02-19 17:18:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:43,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:43,244 INFO L225 Difference]: With dead ends: 15408 [2021-02-19 17:18:43,244 INFO L226 Difference]: Without dead ends: 15276 [2021-02-19 17:18:43,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:18:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15276 states. [2021-02-19 17:18:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15276 to 10533. [2021-02-19 17:18:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10533 states, 10532 states have (on average 2.591340676034941) internal successors, (27292), 10532 states have internal predecessors, (27292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10533 states to 10533 states and 27292 transitions. [2021-02-19 17:18:43,387 INFO L78 Accepts]: Start accepts. Automaton has 10533 states and 27292 transitions. Word has length 47 [2021-02-19 17:18:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:43,387 INFO L480 AbstractCegarLoop]: Abstraction has 10533 states and 27292 transitions. [2021-02-19 17:18:43,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10533 states and 27292 transitions. [2021-02-19 17:18:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:43,394 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:43,394 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:43,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-02-19 17:18:43,602 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:43,602 INFO L82 PathProgramCache]: Analyzing trace with hash -990822208, now seen corresponding path program 131 times [2021-02-19 17:18:43,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:43,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573328594] [2021-02-19 17:18:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:43,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573328594] [2021-02-19 17:18:43,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42821472] [2021-02-19 17:18:43,709 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:43,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:18:43,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:43,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:43,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:43,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:18:43,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242808029] [2021-02-19 17:18:43,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:18:43,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:18:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:18:43,912 INFO L87 Difference]: Start difference. First operand 10533 states and 27292 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2021-02-19 17:18:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:44,497 INFO L93 Difference]: Finished difference Result 10939 states and 28017 transitions. [2021-02-19 17:18:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 47 [2021-02-19 17:18:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:44,510 INFO L225 Difference]: With dead ends: 10939 [2021-02-19 17:18:44,511 INFO L226 Difference]: Without dead ends: 10815 [2021-02-19 17:18:44,511 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:18:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10815 states. [2021-02-19 17:18:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10815 to 10569. [2021-02-19 17:18:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10569 states, 10568 states have (on average 2.5857305071915215) internal successors, (27326), 10568 states have internal predecessors, (27326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10569 states to 10569 states and 27326 transitions. [2021-02-19 17:18:44,646 INFO L78 Accepts]: Start accepts. Automaton has 10569 states and 27326 transitions. Word has length 47 [2021-02-19 17:18:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:44,646 INFO L480 AbstractCegarLoop]: Abstraction has 10569 states and 27326 transitions. [2021-02-19 17:18:44,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2021-02-19 17:18:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 10569 states and 27326 transitions. [2021-02-19 17:18:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:44,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:44,695 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:44,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-02-19 17:18:44,896 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash -759601221, now seen corresponding path program 76 times [2021-02-19 17:18:44,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:44,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947175202] [2021-02-19 17:18:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:44,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947175202] [2021-02-19 17:18:44,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862589022] [2021-02-19 17:18:44,989 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:45,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:45,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:45,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:45,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:45,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:45,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:18:45,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910053399] [2021-02-19 17:18:45,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:45,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:45,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:45,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:45,107 INFO L87 Difference]: Start difference. First operand 10569 states and 27326 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:45,359 INFO L93 Difference]: Finished difference Result 12470 states and 31124 transitions. [2021-02-19 17:18:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:45,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:45,374 INFO L225 Difference]: With dead ends: 12470 [2021-02-19 17:18:45,374 INFO L226 Difference]: Without dead ends: 12368 [2021-02-19 17:18:45,374 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12368 states. [2021-02-19 17:18:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12368 to 10417. [2021-02-19 17:18:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10417 states, 10416 states have (on average 2.5853494623655915) internal successors, (26929), 10416 states have internal predecessors, (26929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:45,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10417 states to 10417 states and 26929 transitions. [2021-02-19 17:18:45,521 INFO L78 Accepts]: Start accepts. Automaton has 10417 states and 26929 transitions. Word has length 47 [2021-02-19 17:18:45,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:45,521 INFO L480 AbstractCegarLoop]: Abstraction has 10417 states and 26929 transitions. [2021-02-19 17:18:45,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 10417 states and 26929 transitions. [2021-02-19 17:18:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:45,528 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:45,528 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:45,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-02-19 17:18:45,728 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash 975177909, now seen corresponding path program 132 times [2021-02-19 17:18:45,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:45,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101366573] [2021-02-19 17:18:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:45,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101366573] [2021-02-19 17:18:45,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667626887] [2021-02-19 17:18:45,819 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:45,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 17:18:45,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:45,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:45,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:45,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:45,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:18:45,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603869379] [2021-02-19 17:18:45,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:45,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:45,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:45,934 INFO L87 Difference]: Start difference. First operand 10417 states and 26929 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-02-19 17:18:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:46,237 INFO L93 Difference]: Finished difference Result 12839 states and 32379 transitions. [2021-02-19 17:18:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:18:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 47 [2021-02-19 17:18:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:46,253 INFO L225 Difference]: With dead ends: 12839 [2021-02-19 17:18:46,253 INFO L226 Difference]: Without dead ends: 12839 [2021-02-19 17:18:46,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:18:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12839 states. [2021-02-19 17:18:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12839 to 10661. [2021-02-19 17:18:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10661 states, 10660 states have (on average 2.598686679174484) internal successors, (27702), 10660 states have internal predecessors, (27702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10661 states to 10661 states and 27702 transitions. [2021-02-19 17:18:46,424 INFO L78 Accepts]: Start accepts. Automaton has 10661 states and 27702 transitions. Word has length 47 [2021-02-19 17:18:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:46,424 INFO L480 AbstractCegarLoop]: Abstraction has 10661 states and 27702 transitions. [2021-02-19 17:18:46,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-02-19 17:18:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10661 states and 27702 transitions. [2021-02-19 17:18:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:46,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:46,431 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:46,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-02-19 17:18:46,632 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:46,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:46,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1064796374, now seen corresponding path program 77 times [2021-02-19 17:18:46,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:46,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337466186] [2021-02-19 17:18:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:46,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337466186] [2021-02-19 17:18:46,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399455195] [2021-02-19 17:18:46,730 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:46,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:18:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:46,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:46,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:46,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:18:46,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580685474] [2021-02-19 17:18:46,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:46,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:46,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:46,839 INFO L87 Difference]: Start difference. First operand 10661 states and 27702 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:47,329 INFO L93 Difference]: Finished difference Result 14169 states and 35663 transitions. [2021-02-19 17:18:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:18:47,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:47,347 INFO L225 Difference]: With dead ends: 14169 [2021-02-19 17:18:47,347 INFO L226 Difference]: Without dead ends: 14155 [2021-02-19 17:18:47,347 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:18:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14155 states. [2021-02-19 17:18:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14155 to 10632. [2021-02-19 17:18:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10632 states, 10631 states have (on average 2.6041764650550276) internal successors, (27685), 10631 states have internal predecessors, (27685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10632 states to 10632 states and 27685 transitions. [2021-02-19 17:18:47,504 INFO L78 Accepts]: Start accepts. Automaton has 10632 states and 27685 transitions. Word has length 47 [2021-02-19 17:18:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:47,504 INFO L480 AbstractCegarLoop]: Abstraction has 10632 states and 27685 transitions. [2021-02-19 17:18:47,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 10632 states and 27685 transitions. [2021-02-19 17:18:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:47,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:47,511 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:47,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-02-19 17:18:47,711 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash 239202314, now seen corresponding path program 133 times [2021-02-19 17:18:47,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:47,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352009220] [2021-02-19 17:18:47,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352009220] [2021-02-19 17:18:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795805030] [2021-02-19 17:18:47,849 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:48,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:48,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-02-19 17:18:48,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728851284] [2021-02-19 17:18:48,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:48,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:48,019 INFO L87 Difference]: Start difference. First operand 10632 states and 27685 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2021-02-19 17:18:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:48,548 INFO L93 Difference]: Finished difference Result 10972 states and 28281 transitions. [2021-02-19 17:18:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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 47 [2021-02-19 17:18:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:48,564 INFO L225 Difference]: With dead ends: 10972 [2021-02-19 17:18:48,564 INFO L226 Difference]: Without dead ends: 10884 [2021-02-19 17:18:48,564 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:18:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10884 states. [2021-02-19 17:18:48,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10884 to 10614. [2021-02-19 17:18:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10614 states, 10613 states have (on average 2.6034109111467068) internal successors, (27630), 10613 states have internal predecessors, (27630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10614 states to 10614 states and 27630 transitions. [2021-02-19 17:18:48,712 INFO L78 Accepts]: Start accepts. Automaton has 10614 states and 27630 transitions. Word has length 47 [2021-02-19 17:18:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:48,713 INFO L480 AbstractCegarLoop]: Abstraction has 10614 states and 27630 transitions. [2021-02-19 17:18:48,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2021-02-19 17:18:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10614 states and 27630 transitions. [2021-02-19 17:18:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:48,719 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:48,719 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:48,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-02-19 17:18:48,919 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:48,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:48,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1077953399, now seen corresponding path program 78 times [2021-02-19 17:18:48,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:48,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270696945] [2021-02-19 17:18:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:49,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270696945] [2021-02-19 17:18:49,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867493121] [2021-02-19 17:18:49,011 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:49,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:18:49,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:49,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:49,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:49,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-02-19 17:18:49,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116446072] [2021-02-19 17:18:49,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:18:49,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:49,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:18:49,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:18:49,147 INFO L87 Difference]: Start difference. First operand 10614 states and 27630 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) [2021-02-19 17:18:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:49,411 INFO L93 Difference]: Finished difference Result 12144 states and 30667 transitions. [2021-02-19 17:18:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:49,412 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 47 [2021-02-19 17:18:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:49,427 INFO L225 Difference]: With dead ends: 12144 [2021-02-19 17:18:49,427 INFO L226 Difference]: Without dead ends: 12090 [2021-02-19 17:18:49,427 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:18:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12090 states. [2021-02-19 17:18:49,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12090 to 10420. [2021-02-19 17:18:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10420 states, 10419 states have (on average 2.602840963624148) internal successors, (27119), 10419 states have internal predecessors, (27119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10420 states to 10420 states and 27119 transitions. [2021-02-19 17:18:49,595 INFO L78 Accepts]: Start accepts. Automaton has 10420 states and 27119 transitions. Word has length 47 [2021-02-19 17:18:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:49,595 INFO L480 AbstractCegarLoop]: Abstraction has 10420 states and 27119 transitions. [2021-02-19 17:18:49,595 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) [2021-02-19 17:18:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 10420 states and 27119 transitions. [2021-02-19 17:18:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:49,602 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:49,602 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:49,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable499,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:49,802 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1223920652, now seen corresponding path program 79 times [2021-02-19 17:18:49,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:49,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882093885] [2021-02-19 17:18:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:49,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882093885] [2021-02-19 17:18:49,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434908533] [2021-02-19 17:18:49,899 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:49,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:49,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:50,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:50,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:18:50,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771123428] [2021-02-19 17:18:50,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:50,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:50,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:50,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:50,004 INFO L87 Difference]: Start difference. First operand 10420 states and 27119 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:50,464 INFO L93 Difference]: Finished difference Result 12479 states and 31704 transitions. [2021-02-19 17:18:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:18:50,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:50,480 INFO L225 Difference]: With dead ends: 12479 [2021-02-19 17:18:50,480 INFO L226 Difference]: Without dead ends: 12465 [2021-02-19 17:18:50,480 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12465 states. [2021-02-19 17:18:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12465 to 10442. [2021-02-19 17:18:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10442 states, 10441 states have (on average 2.6033904798390957) internal successors, (27182), 10441 states have internal predecessors, (27182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10442 states to 10442 states and 27182 transitions. [2021-02-19 17:18:50,625 INFO L78 Accepts]: Start accepts. Automaton has 10442 states and 27182 transitions. Word has length 47 [2021-02-19 17:18:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:50,626 INFO L480 AbstractCegarLoop]: Abstraction has 10442 states and 27182 transitions. [2021-02-19 17:18:50,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 10442 states and 27182 transitions. [2021-02-19 17:18:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:50,631 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:50,631 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:50,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:50,832 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1400811596, now seen corresponding path program 134 times [2021-02-19 17:18:50,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:50,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83095265] [2021-02-19 17:18:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83095265] [2021-02-19 17:18:50,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951419754] [2021-02-19 17:18:50,940 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:50,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:50,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:50,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:51,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:51,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-02-19 17:18:51,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242346379] [2021-02-19 17:18:51,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:18:51,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:51,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:18:51,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:51,177 INFO L87 Difference]: Start difference. First operand 10442 states and 27182 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2021-02-19 17:18:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:51,567 INFO L93 Difference]: Finished difference Result 10497 states and 27271 transitions. [2021-02-19 17:18:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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 47 [2021-02-19 17:18:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:51,580 INFO L225 Difference]: With dead ends: 10497 [2021-02-19 17:18:51,580 INFO L226 Difference]: Without dead ends: 10459 [2021-02-19 17:18:51,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2021-02-19 17:18:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 10433. [2021-02-19 17:18:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10433 states, 10432 states have (on average 2.6030483128834354) internal successors, (27155), 10432 states have internal predecessors, (27155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10433 states to 10433 states and 27155 transitions. [2021-02-19 17:18:51,719 INFO L78 Accepts]: Start accepts. Automaton has 10433 states and 27155 transitions. Word has length 47 [2021-02-19 17:18:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:51,719 INFO L480 AbstractCegarLoop]: Abstraction has 10433 states and 27155 transitions. [2021-02-19 17:18:51,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2021-02-19 17:18:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 10433 states and 27155 transitions. [2021-02-19 17:18:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:51,724 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:51,724 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:51,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:51,925 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:51,925 INFO L82 PathProgramCache]: Analyzing trace with hash 118327913, now seen corresponding path program 135 times [2021-02-19 17:18:51,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:51,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29251219] [2021-02-19 17:18:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:51,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29251219] [2021-02-19 17:18:51,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66101667] [2021-02-19 17:18:51,994 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:52,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:18:52,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:52,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:52,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:18:52,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562588347] [2021-02-19 17:18:52,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:52,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:52,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:52,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:52,114 INFO L87 Difference]: Start difference. First operand 10433 states and 27155 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 17:18:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:52,327 INFO L93 Difference]: Finished difference Result 13321 states and 33775 transitions. [2021-02-19 17:18:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 47 [2021-02-19 17:18:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:52,345 INFO L225 Difference]: With dead ends: 13321 [2021-02-19 17:18:52,345 INFO L226 Difference]: Without dead ends: 13321 [2021-02-19 17:18:52,346 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13321 states. [2021-02-19 17:18:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13321 to 11000. [2021-02-19 17:18:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11000 states, 10999 states have (on average 2.6252386580598235) internal successors, (28875), 10999 states have internal predecessors, (28875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11000 states to 11000 states and 28875 transitions. [2021-02-19 17:18:52,520 INFO L78 Accepts]: Start accepts. Automaton has 11000 states and 28875 transitions. Word has length 47 [2021-02-19 17:18:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:52,520 INFO L480 AbstractCegarLoop]: Abstraction has 11000 states and 28875 transitions. [2021-02-19 17:18:52,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 17:18:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 11000 states and 28875 transitions. [2021-02-19 17:18:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:52,527 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:52,527 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:52,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-02-19 17:18:52,728 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:52,728 INFO L82 PathProgramCache]: Analyzing trace with hash -652507754, now seen corresponding path program 80 times [2021-02-19 17:18:52,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:52,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884410441] [2021-02-19 17:18:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:52,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884410441] [2021-02-19 17:18:52,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770595528] [2021-02-19 17:18:52,806 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:52,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:52,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:52,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:52,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:18:52,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254566453] [2021-02-19 17:18:52,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:18:52,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:52,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:18:52,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:52,913 INFO L87 Difference]: Start difference. First operand 11000 states and 28875 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:53,323 INFO L93 Difference]: Finished difference Result 12016 states and 31032 transitions. [2021-02-19 17:18:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:18:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:53,338 INFO L225 Difference]: With dead ends: 12016 [2021-02-19 17:18:53,338 INFO L226 Difference]: Without dead ends: 12016 [2021-02-19 17:18:53,339 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12016 states. [2021-02-19 17:18:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12016 to 11016. [2021-02-19 17:18:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11015 states have (on average 2.6254198819791195) internal successors, (28919), 11015 states have internal predecessors, (28919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 28919 transitions. [2021-02-19 17:18:53,495 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 28919 transitions. Word has length 47 [2021-02-19 17:18:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:53,495 INFO L480 AbstractCegarLoop]: Abstraction has 11016 states and 28919 transitions. [2021-02-19 17:18:53,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 28919 transitions. [2021-02-19 17:18:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:53,502 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:53,502 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:53,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:53,702 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2009163158, now seen corresponding path program 136 times [2021-02-19 17:18:53,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:53,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639862423] [2021-02-19 17:18:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:53,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639862423] [2021-02-19 17:18:53,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342830759] [2021-02-19 17:18:53,802 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:53,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:53,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:53,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:53,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:53,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-02-19 17:18:53,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32373944] [2021-02-19 17:18:53,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:53,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:53,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:53,963 INFO L87 Difference]: Start difference. First operand 11016 states and 28919 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 17:18:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:54,313 INFO L93 Difference]: Finished difference Result 11087 states and 29024 transitions. [2021-02-19 17:18:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 47 [2021-02-19 17:18:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:54,327 INFO L225 Difference]: With dead ends: 11087 [2021-02-19 17:18:54,327 INFO L226 Difference]: Without dead ends: 11064 [2021-02-19 17:18:54,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11064 states. [2021-02-19 17:18:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11064 to 11007. [2021-02-19 17:18:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11007 states, 11006 states have (on average 2.625477012538615) internal successors, (28896), 11006 states have internal predecessors, (28896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11007 states to 11007 states and 28896 transitions. [2021-02-19 17:18:54,485 INFO L78 Accepts]: Start accepts. Automaton has 11007 states and 28896 transitions. Word has length 47 [2021-02-19 17:18:54,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:54,485 INFO L480 AbstractCegarLoop]: Abstraction has 11007 states and 28896 transitions. [2021-02-19 17:18:54,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 17:18:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 11007 states and 28896 transitions. [2021-02-19 17:18:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:54,492 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:54,492 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:54,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:54,694 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:54,694 INFO L82 PathProgramCache]: Analyzing trace with hash -732216439, now seen corresponding path program 81 times [2021-02-19 17:18:54,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:54,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971689506] [2021-02-19 17:18:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:54,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971689506] [2021-02-19 17:18:54,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706540896] [2021-02-19 17:18:54,773 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:54,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:18:54,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:54,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:54,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:54,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:18:54,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863891335] [2021-02-19 17:18:54,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:18:54,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:54,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:18:54,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:54,885 INFO L87 Difference]: Start difference. First operand 11007 states and 28896 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:55,080 INFO L93 Difference]: Finished difference Result 12029 states and 30900 transitions. [2021-02-19 17:18:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:55,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:55,094 INFO L225 Difference]: With dead ends: 12029 [2021-02-19 17:18:55,094 INFO L226 Difference]: Without dead ends: 12013 [2021-02-19 17:18:55,094 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12013 states. [2021-02-19 17:18:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12013 to 11007. [2021-02-19 17:18:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11007 states, 11006 states have (on average 2.624750136289297) internal successors, (28888), 11006 states have internal predecessors, (28888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11007 states to 11007 states and 28888 transitions. [2021-02-19 17:18:55,248 INFO L78 Accepts]: Start accepts. Automaton has 11007 states and 28888 transitions. Word has length 47 [2021-02-19 17:18:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:55,248 INFO L480 AbstractCegarLoop]: Abstraction has 11007 states and 28888 transitions. [2021-02-19 17:18:55,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 11007 states and 28888 transitions. [2021-02-19 17:18:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:55,255 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:55,255 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:55,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-02-19 17:18:55,455 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:55,456 INFO L82 PathProgramCache]: Analyzing trace with hash 568667905, now seen corresponding path program 137 times [2021-02-19 17:18:55,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:55,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566796094] [2021-02-19 17:18:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:55,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566796094] [2021-02-19 17:18:55,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154521012] [2021-02-19 17:18:55,521 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:55,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:18:55,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:55,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:55,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:55,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-02-19 17:18:55,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463377465] [2021-02-19 17:18:55,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:18:55,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:55,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:18:55,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:18:55,652 INFO L87 Difference]: Start difference. First operand 11007 states and 28888 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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) [2021-02-19 17:18:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:55,865 INFO L93 Difference]: Finished difference Result 14362 states and 36240 transitions. [2021-02-19 17:18:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:18:55,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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 47 [2021-02-19 17:18:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:55,882 INFO L225 Difference]: With dead ends: 14362 [2021-02-19 17:18:55,883 INFO L226 Difference]: Without dead ends: 14362 [2021-02-19 17:18:55,883 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14362 states. [2021-02-19 17:18:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14362 to 11460. [2021-02-19 17:18:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11460 states, 11459 states have (on average 2.638450126538092) internal successors, (30234), 11459 states have internal predecessors, (30234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 30234 transitions. [2021-02-19 17:18:56,053 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 30234 transitions. Word has length 47 [2021-02-19 17:18:56,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:56,053 INFO L480 AbstractCegarLoop]: Abstraction has 11460 states and 30234 transitions. [2021-02-19 17:18:56,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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) [2021-02-19 17:18:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 30234 transitions. [2021-02-19 17:18:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:56,060 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:56,060 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:56,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-02-19 17:18:56,261 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:56,261 INFO L82 PathProgramCache]: Analyzing trace with hash 330606388, now seen corresponding path program 82 times [2021-02-19 17:18:56,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:56,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974803387] [2021-02-19 17:18:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974803387] [2021-02-19 17:18:56,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239540739] [2021-02-19 17:18:56,339 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:56,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:56,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:56,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:18:56,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934722082] [2021-02-19 17:18:56,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:56,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:56,442 INFO L87 Difference]: Start difference. First operand 11460 states and 30234 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:56,840 INFO L93 Difference]: Finished difference Result 13228 states and 33975 transitions. [2021-02-19 17:18:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:56,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:18:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:56,857 INFO L225 Difference]: With dead ends: 13228 [2021-02-19 17:18:56,858 INFO L226 Difference]: Without dead ends: 13185 [2021-02-19 17:18:56,858 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13185 states. [2021-02-19 17:18:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13185 to 12058. [2021-02-19 17:18:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12058 states, 12057 states have (on average 2.6192253462718753) internal successors, (31580), 12057 states have internal predecessors, (31580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12058 states to 12058 states and 31580 transitions. [2021-02-19 17:18:57,070 INFO L78 Accepts]: Start accepts. Automaton has 12058 states and 31580 transitions. Word has length 47 [2021-02-19 17:18:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:57,070 INFO L480 AbstractCegarLoop]: Abstraction has 12058 states and 31580 transitions. [2021-02-19 17:18:57,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 12058 states and 31580 transitions. [2021-02-19 17:18:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:57,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:57,078 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:57,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:57,278 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1223090469, now seen corresponding path program 138 times [2021-02-19 17:18:57,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:57,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304034545] [2021-02-19 17:18:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:57,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304034545] [2021-02-19 17:18:57,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194153709] [2021-02-19 17:18:57,341 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:57,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:18:57,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:57,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:57,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:57,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:18:57,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61223437] [2021-02-19 17:18:57,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:57,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:57,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:57,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:57,446 INFO L87 Difference]: Start difference. First operand 12058 states and 31580 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) [2021-02-19 17:18:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:57,600 INFO L93 Difference]: Finished difference Result 14393 states and 36304 transitions. [2021-02-19 17:18:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:18:57,601 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 47 [2021-02-19 17:18:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:57,617 INFO L225 Difference]: With dead ends: 14393 [2021-02-19 17:18:57,617 INFO L226 Difference]: Without dead ends: 14390 [2021-02-19 17:18:57,617 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14390 states. [2021-02-19 17:18:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14390 to 12057. [2021-02-19 17:18:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12057 states, 12056 states have (on average 2.6188619774386197) internal successors, (31573), 12056 states have internal predecessors, (31573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 31573 transitions. [2021-02-19 17:18:57,789 INFO L78 Accepts]: Start accepts. Automaton has 12057 states and 31573 transitions. Word has length 47 [2021-02-19 17:18:57,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:57,789 INFO L480 AbstractCegarLoop]: Abstraction has 12057 states and 31573 transitions. [2021-02-19 17:18:57,789 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) [2021-02-19 17:18:57,789 INFO L276 IsEmpty]: Start isEmpty. Operand 12057 states and 31573 transitions. [2021-02-19 17:18:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:57,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:57,796 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:57,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:57,996 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1016027903, now seen corresponding path program 139 times [2021-02-19 17:18:57,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:57,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049057525] [2021-02-19 17:18:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:58,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049057525] [2021-02-19 17:18:58,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176095214] [2021-02-19 17:18:58,059 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:58,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:58,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:58,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:58,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:18:58,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59218013] [2021-02-19 17:18:58,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:58,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:58,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:58,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:58,161 INFO L87 Difference]: Start difference. First operand 12057 states and 31573 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) [2021-02-19 17:18:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:58,313 INFO L93 Difference]: Finished difference Result 14272 states and 36292 transitions. [2021-02-19 17:18:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:18:58,313 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 47 [2021-02-19 17:18:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:58,331 INFO L225 Difference]: With dead ends: 14272 [2021-02-19 17:18:58,331 INFO L226 Difference]: Without dead ends: 14260 [2021-02-19 17:18:58,331 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:58,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14260 states. [2021-02-19 17:18:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14260 to 12057. [2021-02-19 17:18:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12057 states, 12056 states have (on average 2.618364299933643) internal successors, (31567), 12056 states have internal predecessors, (31567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 31567 transitions. [2021-02-19 17:18:58,524 INFO L78 Accepts]: Start accepts. Automaton has 12057 states and 31567 transitions. Word has length 47 [2021-02-19 17:18:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:58,524 INFO L480 AbstractCegarLoop]: Abstraction has 12057 states and 31567 transitions. [2021-02-19 17:18:58,524 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) [2021-02-19 17:18:58,524 INFO L276 IsEmpty]: Start isEmpty. Operand 12057 states and 31567 transitions. [2021-02-19 17:18:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:58,532 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:58,532 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:58,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-02-19 17:18:58,732 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1830939380, now seen corresponding path program 140 times [2021-02-19 17:18:58,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:58,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643832509] [2021-02-19 17:18:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:58,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643832509] [2021-02-19 17:18:58,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991010511] [2021-02-19 17:18:58,806 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:58,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:58,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:58,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:58,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:58,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-02-19 17:18:58,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341857102] [2021-02-19 17:18:58,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:18:58,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:18:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:58,925 INFO L87 Difference]: Start difference. First operand 12057 states and 31567 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2021-02-19 17:18:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:59,411 INFO L93 Difference]: Finished difference Result 12695 states and 32752 transitions. [2021-02-19 17:18:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 47 [2021-02-19 17:18:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:59,428 INFO L225 Difference]: With dead ends: 12695 [2021-02-19 17:18:59,428 INFO L226 Difference]: Without dead ends: 12572 [2021-02-19 17:18:59,428 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12572 states. [2021-02-19 17:18:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12572 to 11820. [2021-02-19 17:18:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11820 states, 11819 states have (on average 2.621795414163635) internal successors, (30987), 11819 states have internal predecessors, (30987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11820 states to 11820 states and 30987 transitions. [2021-02-19 17:18:59,594 INFO L78 Accepts]: Start accepts. Automaton has 11820 states and 30987 transitions. Word has length 47 [2021-02-19 17:18:59,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:59,594 INFO L480 AbstractCegarLoop]: Abstraction has 11820 states and 30987 transitions. [2021-02-19 17:18:59,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2021-02-19 17:18:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 11820 states and 30987 transitions. [2021-02-19 17:18:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:18:59,602 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:59,602 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:59,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-02-19 17:18:59,802 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:59,802 INFO L82 PathProgramCache]: Analyzing trace with hash 596912347, now seen corresponding path program 141 times [2021-02-19 17:18:59,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:59,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597766585] [2021-02-19 17:18:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597766585] [2021-02-19 17:18:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830668862] [2021-02-19 17:18:59,930 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:59,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:18:59,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:59,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:00,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:00,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:19:00,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012149371] [2021-02-19 17:19:00,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:00,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:00,037 INFO L87 Difference]: Start difference. First operand 11820 states and 30987 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:00,204 INFO L93 Difference]: Finished difference Result 14028 states and 35670 transitions. [2021-02-19 17:19:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:19:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:19:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:00,222 INFO L225 Difference]: With dead ends: 14028 [2021-02-19 17:19:00,222 INFO L226 Difference]: Without dead ends: 14010 [2021-02-19 17:19:00,222 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:19:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14010 states. [2021-02-19 17:19:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14010 to 11993. [2021-02-19 17:19:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11993 states, 11992 states have (on average 2.628585723815877) internal successors, (31522), 11992 states have internal predecessors, (31522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11993 states to 11993 states and 31522 transitions. [2021-02-19 17:19:00,403 INFO L78 Accepts]: Start accepts. Automaton has 11993 states and 31522 transitions. Word has length 47 [2021-02-19 17:19:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:00,403 INFO L480 AbstractCegarLoop]: Abstraction has 11993 states and 31522 transitions. [2021-02-19 17:19:00,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 11993 states and 31522 transitions. [2021-02-19 17:19:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:19:00,410 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:00,410 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:00,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-02-19 17:19:00,611 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash -394207551, now seen corresponding path program 142 times [2021-02-19 17:19:00,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:00,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862699353] [2021-02-19 17:19:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:00,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862699353] [2021-02-19 17:19:00,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408408834] [2021-02-19 17:19:00,696 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:00,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:00,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:00,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:19:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:00,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:00,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:19:00,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304241371] [2021-02-19 17:19:00,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:19:00,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:19:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:19:00,801 INFO L87 Difference]: Start difference. First operand 11993 states and 31522 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:01,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:01,014 INFO L93 Difference]: Finished difference Result 14091 states and 35774 transitions. [2021-02-19 17:19:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:19:01,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:19:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:01,033 INFO L225 Difference]: With dead ends: 14091 [2021-02-19 17:19:01,033 INFO L226 Difference]: Without dead ends: 14064 [2021-02-19 17:19:01,034 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:19:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14064 states. [2021-02-19 17:19:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14064 to 11993. [2021-02-19 17:19:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11993 states, 11992 states have (on average 2.6283355570380253) internal successors, (31519), 11992 states have internal predecessors, (31519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11993 states to 11993 states and 31519 transitions. [2021-02-19 17:19:01,228 INFO L78 Accepts]: Start accepts. Automaton has 11993 states and 31519 transitions. Word has length 47 [2021-02-19 17:19:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:01,228 INFO L480 AbstractCegarLoop]: Abstraction has 11993 states and 31519 transitions. [2021-02-19 17:19:01,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 11993 states and 31519 transitions. [2021-02-19 17:19:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:19:01,235 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:01,235 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:01,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:01,435 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1053071131, now seen corresponding path program 143 times [2021-02-19 17:19:01,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:01,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448096557] [2021-02-19 17:19:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:01,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448096557] [2021-02-19 17:19:01,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567753883] [2021-02-19 17:19:01,529 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:01,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:19:01,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:01,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:19:01,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:01,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:01,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-02-19 17:19:01,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316534589] [2021-02-19 17:19:01,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:19:01,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:19:01,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:19:01,662 INFO L87 Difference]: Start difference. First operand 11993 states and 31519 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) [2021-02-19 17:19:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:01,959 INFO L93 Difference]: Finished difference Result 14368 states and 36331 transitions. [2021-02-19 17:19:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:19:01,960 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 47 [2021-02-19 17:19:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:01,977 INFO L225 Difference]: With dead ends: 14368 [2021-02-19 17:19:01,977 INFO L226 Difference]: Without dead ends: 14332 [2021-02-19 17:19:01,978 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:19:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14332 states. [2021-02-19 17:19:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14332 to 11993. [2021-02-19 17:19:02,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11993 states, 11992 states have (on average 2.6280853902601735) internal successors, (31516), 11992 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11993 states to 11993 states and 31516 transitions. [2021-02-19 17:19:02,176 INFO L78 Accepts]: Start accepts. Automaton has 11993 states and 31516 transitions. Word has length 47 [2021-02-19 17:19:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:02,177 INFO L480 AbstractCegarLoop]: Abstraction has 11993 states and 31516 transitions. [2021-02-19 17:19:02,177 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) [2021-02-19 17:19:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 11993 states and 31516 transitions. [2021-02-19 17:19:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:19:02,184 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:02,184 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:02,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-02-19 17:19:02,385 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:02,385 INFO L82 PathProgramCache]: Analyzing trace with hash -244397951, now seen corresponding path program 144 times [2021-02-19 17:19:02,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:02,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044652075] [2021-02-19 17:19:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:02,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044652075] [2021-02-19 17:19:02,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571369369] [2021-02-19 17:19:02,490 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:02,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:19:02,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:19:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:02,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:02,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:19:02,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931760333] [2021-02-19 17:19:02,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:19:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:19:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:19:02,644 INFO L87 Difference]: Start difference. First operand 11993 states and 31516 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:02,886 INFO L93 Difference]: Finished difference Result 14376 states and 36287 transitions. [2021-02-19 17:19:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:19:02,887 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:19:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:02,905 INFO L225 Difference]: With dead ends: 14376 [2021-02-19 17:19:02,905 INFO L226 Difference]: Without dead ends: 14331 [2021-02-19 17:19:02,905 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14331 states. [2021-02-19 17:19:03,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14331 to 11993. [2021-02-19 17:19:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11993 states, 11992 states have (on average 2.6278352234823217) internal successors, (31513), 11992 states have internal predecessors, (31513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11993 states to 11993 states and 31513 transitions. [2021-02-19 17:19:03,085 INFO L78 Accepts]: Start accepts. Automaton has 11993 states and 31513 transitions. Word has length 47 [2021-02-19 17:19:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:03,085 INFO L480 AbstractCegarLoop]: Abstraction has 11993 states and 31513 transitions. [2021-02-19 17:19:03,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 11993 states and 31513 transitions. [2021-02-19 17:19:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:19:03,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:03,092 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:03,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-02-19 17:19:03,293 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1478005334, now seen corresponding path program 145 times [2021-02-19 17:19:03,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:03,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642957132] [2021-02-19 17:19:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:03,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642957132] [2021-02-19 17:19:03,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757306016] [2021-02-19 17:19:03,415 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:03,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 17:19:03,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:03,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:19:03,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 17:19:03,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:19:03,616 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-02-19 17:19:03,616 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:19:03,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:19:03,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-02-19 17:19:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:03,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:03,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-02-19 17:19:03,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14065157] [2021-02-19 17:19:03,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:19:03,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:03,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:19:03,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:03,629 INFO L87 Difference]: Start difference. First operand 11993 states and 31513 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:06,483 INFO L93 Difference]: Finished difference Result 24067 states and 58447 transitions. [2021-02-19 17:19:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-02-19 17:19:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:19:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:06,507 INFO L225 Difference]: With dead ends: 24067 [2021-02-19 17:19:06,507 INFO L226 Difference]: Without dead ends: 23396 [2021-02-19 17:19:06,508 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1477, Invalid=13775, Unknown=0, NotChecked=0, Total=15252 [2021-02-19 17:19:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23396 states. [2021-02-19 17:19:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23396 to 15197. [2021-02-19 17:19:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15197 states, 15196 states have (on average 2.6318768096867595) internal successors, (39994), 15196 states have internal predecessors, (39994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15197 states to 15197 states and 39994 transitions. [2021-02-19 17:19:06,770 INFO L78 Accepts]: Start accepts. Automaton has 15197 states and 39994 transitions. Word has length 47 [2021-02-19 17:19:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:06,771 INFO L480 AbstractCegarLoop]: Abstraction has 15197 states and 39994 transitions. [2021-02-19 17:19:06,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 15197 states and 39994 transitions. [2021-02-19 17:19:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:19:06,777 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:06,778 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:06,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:06,982 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:06,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1239943817, now seen corresponding path program 83 times [2021-02-19 17:19:06,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:06,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247555554] [2021-02-19 17:19:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:07,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247555554] [2021-02-19 17:19:07,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841014929] [2021-02-19 17:19:07,049 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:07,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:19:07,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:19:07,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:07,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:07,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2021-02-19 17:19:07,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202998470] [2021-02-19 17:19:07,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:19:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:07,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:19:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:19:07,196 INFO L87 Difference]: Start difference. First operand 15197 states and 39994 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:07,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:07,540 INFO L93 Difference]: Finished difference Result 17242 states and 44306 transitions. [2021-02-19 17:19:07,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:07,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:19:07,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:07,563 INFO L225 Difference]: With dead ends: 17242 [2021-02-19 17:19:07,563 INFO L226 Difference]: Without dead ends: 17226 [2021-02-19 17:19:07,563 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-02-19 17:19:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 14465. [2021-02-19 17:19:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14465 states, 14464 states have (on average 2.6145602876106193) internal successors, (37817), 14464 states have internal predecessors, (37817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14465 states to 14465 states and 37817 transitions. [2021-02-19 17:19:07,804 INFO L78 Accepts]: Start accepts. Automaton has 14465 states and 37817 transitions. Word has length 47 [2021-02-19 17:19:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:07,804 INFO L480 AbstractCegarLoop]: Abstraction has 14465 states and 37817 transitions. [2021-02-19 17:19:07,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14465 states and 37817 transitions. [2021-02-19 17:19:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:19:07,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:07,811 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:08,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-02-19 17:19:08,011 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash 618063407, now seen corresponding path program 84 times [2021-02-19 17:19:08,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:08,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180784009] [2021-02-19 17:19:08,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180784009] [2021-02-19 17:19:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163142160] [2021-02-19 17:19:08,077 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:08,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:19:08,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:19:08,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:08,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:08,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-02-19 17:19:08,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169376982] [2021-02-19 17:19:08,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:08,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:08,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:08,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:08,191 INFO L87 Difference]: Start difference. First operand 14465 states and 37817 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:19:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:08,482 INFO L93 Difference]: Finished difference Result 18659 states and 47018 transitions. [2021-02-19 17:19:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:19:08,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 47 [2021-02-19 17:19:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:08,506 INFO L225 Difference]: With dead ends: 18659 [2021-02-19 17:19:08,506 INFO L226 Difference]: Without dead ends: 18659 [2021-02-19 17:19:08,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:19:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18659 states. [2021-02-19 17:19:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18659 to 14479. [2021-02-19 17:19:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14479 states, 14478 states have (on average 2.6146567205415114) internal successors, (37855), 14478 states have internal predecessors, (37855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14479 states to 14479 states and 37855 transitions. [2021-02-19 17:19:08,774 INFO L78 Accepts]: Start accepts. Automaton has 14479 states and 37855 transitions. Word has length 47 [2021-02-19 17:19:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:08,774 INFO L480 AbstractCegarLoop]: Abstraction has 14479 states and 37855 transitions. [2021-02-19 17:19:08,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:19:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 14479 states and 37855 transitions. [2021-02-19 17:19:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:19:08,781 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:08,781 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:08,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:08,981 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:08,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1019509049, now seen corresponding path program 85 times [2021-02-19 17:19:08,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:08,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163854919] [2021-02-19 17:19:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163854919] [2021-02-19 17:19:09,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12793866] [2021-02-19 17:19:09,057 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:19:09,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:09,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:09,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-02-19 17:19:09,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118828305] [2021-02-19 17:19:09,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:19:09,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:09,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:19:09,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:19:09,194 INFO L87 Difference]: Start difference. First operand 14479 states and 37855 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:09,666 INFO L93 Difference]: Finished difference Result 16775 states and 42545 transitions. [2021-02-19 17:19:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:19:09,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:19:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:09,690 INFO L225 Difference]: With dead ends: 16775 [2021-02-19 17:19:09,690 INFO L226 Difference]: Without dead ends: 16775 [2021-02-19 17:19:09,691 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:19:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16775 states. [2021-02-19 17:19:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16775 to 14081. [2021-02-19 17:19:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14081 states, 14080 states have (on average 2.628053977272727) internal successors, (37003), 14080 states have internal predecessors, (37003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14081 states to 14081 states and 37003 transitions. [2021-02-19 17:19:09,941 INFO L78 Accepts]: Start accepts. Automaton has 14081 states and 37003 transitions. Word has length 47 [2021-02-19 17:19:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:09,941 INFO L480 AbstractCegarLoop]: Abstraction has 14081 states and 37003 transitions. [2021-02-19 17:19:09,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:09,942 INFO L276 IsEmpty]: Start isEmpty. Operand 14081 states and 37003 transitions. [2021-02-19 17:19:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 17:19:09,949 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:09,949 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:10,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:10,149 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1559844187, now seen corresponding path program 146 times [2021-02-19 17:19:10,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:10,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371728269] [2021-02-19 17:19:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:10,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371728269] [2021-02-19 17:19:10,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534942808] [2021-02-19 17:19:10,269 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:10,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:10,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:19:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:10,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-02-19 17:19:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117332012] [2021-02-19 17:19:10,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:19:10,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:19:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:19:10,382 INFO L87 Difference]: Start difference. First operand 14081 states and 37003 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:10,669 INFO L93 Difference]: Finished difference Result 15863 states and 40647 transitions. [2021-02-19 17:19:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:19:10,670 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 17:19:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:10,692 INFO L225 Difference]: With dead ends: 15863 [2021-02-19 17:19:10,692 INFO L226 Difference]: Without dead ends: 15807 [2021-02-19 17:19:10,692 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15807 states. [2021-02-19 17:19:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15807 to 14090. [2021-02-19 17:19:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14090 states, 14089 states have (on average 2.6273688693306836) internal successors, (37017), 14089 states have internal predecessors, (37017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14090 states to 14090 states and 37017 transitions. [2021-02-19 17:19:10,923 INFO L78 Accepts]: Start accepts. Automaton has 14090 states and 37017 transitions. Word has length 47 [2021-02-19 17:19:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:10,923 INFO L480 AbstractCegarLoop]: Abstraction has 14090 states and 37017 transitions. [2021-02-19 17:19:10,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 14090 states and 37017 transitions. [2021-02-19 17:19:10,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:10,931 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:10,931 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:11,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:11,132 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1896172028, now seen corresponding path program 147 times [2021-02-19 17:19:11,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:11,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278890224] [2021-02-19 17:19:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:11,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278890224] [2021-02-19 17:19:11,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84122820] [2021-02-19 17:19:11,196 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:11,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:19:11,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:11,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:11,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:11,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:11,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:19:11,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504722727] [2021-02-19 17:19:11,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:19:11,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:19:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:11,305 INFO L87 Difference]: Start difference. First operand 14090 states and 37017 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:11,689 INFO L93 Difference]: Finished difference Result 16589 states and 42624 transitions. [2021-02-19 17:19:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:19:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 17:19:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:11,716 INFO L225 Difference]: With dead ends: 16589 [2021-02-19 17:19:11,716 INFO L226 Difference]: Without dead ends: 16548 [2021-02-19 17:19:11,717 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16548 states. [2021-02-19 17:19:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16548 to 15618. [2021-02-19 17:19:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15618 states, 15617 states have (on average 2.60645450470641) internal successors, (40705), 15617 states have internal predecessors, (40705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15618 states to 15618 states and 40705 transitions. [2021-02-19 17:19:11,983 INFO L78 Accepts]: Start accepts. Automaton has 15618 states and 40705 transitions. Word has length 50 [2021-02-19 17:19:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:11,983 INFO L480 AbstractCegarLoop]: Abstraction has 15618 states and 40705 transitions. [2021-02-19 17:19:11,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 15618 states and 40705 transitions. [2021-02-19 17:19:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:11,992 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:11,992 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:12,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:12,193 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1860539034, now seen corresponding path program 148 times [2021-02-19 17:19:12,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:12,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159917076] [2021-02-19 17:19:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:12,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159917076] [2021-02-19 17:19:12,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255281553] [2021-02-19 17:19:12,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:12,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:12,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:12,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:12,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:19:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262914666] [2021-02-19 17:19:12,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:19:12,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:12,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:19:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:12,355 INFO L87 Difference]: Start difference. First operand 15618 states and 40705 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:12,676 INFO L93 Difference]: Finished difference Result 17323 states and 44223 transitions. [2021-02-19 17:19:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:19:12,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 17:19:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:12,699 INFO L225 Difference]: With dead ends: 17323 [2021-02-19 17:19:12,699 INFO L226 Difference]: Without dead ends: 17257 [2021-02-19 17:19:12,699 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17257 states. [2021-02-19 17:19:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17257 to 15711. [2021-02-19 17:19:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15711 states, 15710 states have (on average 2.6045194143857415) internal successors, (40917), 15710 states have internal predecessors, (40917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15711 states to 15711 states and 40917 transitions. [2021-02-19 17:19:12,925 INFO L78 Accepts]: Start accepts. Automaton has 15711 states and 40917 transitions. Word has length 50 [2021-02-19 17:19:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:12,926 INFO L480 AbstractCegarLoop]: Abstraction has 15711 states and 40917 transitions. [2021-02-19 17:19:12,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 15711 states and 40917 transitions. [2021-02-19 17:19:12,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:12,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:12,934 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:13,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:13,134 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash -7628425, now seen corresponding path program 4 times [2021-02-19 17:19:13,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:13,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949722710] [2021-02-19 17:19:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:13,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949722710] [2021-02-19 17:19:13,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564525873] [2021-02-19 17:19:13,270 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:13,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:13,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:19:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:13,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:13,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-02-19 17:19:13,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119521160] [2021-02-19 17:19:13,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:19:13,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:13,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:19:13,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:19:13,544 INFO L87 Difference]: Start difference. First operand 15711 states and 40917 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 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) [2021-02-19 17:19:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:14,300 INFO L93 Difference]: Finished difference Result 15801 states and 41044 transitions. [2021-02-19 17:19:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:19:14,301 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 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 50 [2021-02-19 17:19:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:14,325 INFO L225 Difference]: With dead ends: 15801 [2021-02-19 17:19:14,325 INFO L226 Difference]: Without dead ends: 15659 [2021-02-19 17:19:14,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:19:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15659 states. [2021-02-19 17:19:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15659 to 15633. [2021-02-19 17:19:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15633 states, 15632 states have (on average 2.606704196519959) internal successors, (40748), 15632 states have internal predecessors, (40748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15633 states to 15633 states and 40748 transitions. [2021-02-19 17:19:14,586 INFO L78 Accepts]: Start accepts. Automaton has 15633 states and 40748 transitions. Word has length 50 [2021-02-19 17:19:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:14,586 INFO L480 AbstractCegarLoop]: Abstraction has 15633 states and 40748 transitions. [2021-02-19 17:19:14,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 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) [2021-02-19 17:19:14,586 INFO L276 IsEmpty]: Start isEmpty. Operand 15633 states and 40748 transitions. [2021-02-19 17:19:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:14,594 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:14,594 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:14,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:14,795 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:14,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1761499842, now seen corresponding path program 149 times [2021-02-19 17:19:14,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:14,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472494818] [2021-02-19 17:19:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:14,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472494818] [2021-02-19 17:19:14,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647884400] [2021-02-19 17:19:14,866 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:14,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:19:14,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:14,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:14,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:14,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:14,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:19:14,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565693433] [2021-02-19 17:19:14,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:19:14,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:14,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:19:14,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:14,971 INFO L87 Difference]: Start difference. First operand 15633 states and 40748 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:15,292 INFO L93 Difference]: Finished difference Result 16924 states and 43372 transitions. [2021-02-19 17:19:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:19:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 17:19:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:15,316 INFO L225 Difference]: With dead ends: 16924 [2021-02-19 17:19:15,316 INFO L226 Difference]: Without dead ends: 16861 [2021-02-19 17:19:15,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16861 states. [2021-02-19 17:19:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16861 to 15651. [2021-02-19 17:19:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15651 states, 15650 states have (on average 2.605367412140575) internal successors, (40774), 15650 states have internal predecessors, (40774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15651 states to 15651 states and 40774 transitions. [2021-02-19 17:19:15,549 INFO L78 Accepts]: Start accepts. Automaton has 15651 states and 40774 transitions. Word has length 50 [2021-02-19 17:19:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:15,549 INFO L480 AbstractCegarLoop]: Abstraction has 15651 states and 40774 transitions. [2021-02-19 17:19:15,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 15651 states and 40774 transitions. [2021-02-19 17:19:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:15,557 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:15,557 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:15,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-02-19 17:19:15,757 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash -836689946, now seen corresponding path program 150 times [2021-02-19 17:19:15,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:15,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840565860] [2021-02-19 17:19:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:15,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840565860] [2021-02-19 17:19:15,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510545272] [2021-02-19 17:19:15,824 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:15,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-02-19 17:19:15,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:15,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:15,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:15,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:15,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:19:15,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521176269] [2021-02-19 17:19:15,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:19:15,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:19:15,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:15,936 INFO L87 Difference]: Start difference. First operand 15651 states and 40774 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:16,278 INFO L93 Difference]: Finished difference Result 16830 states and 43166 transitions. [2021-02-19 17:19:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:19:16,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 17:19:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:16,300 INFO L225 Difference]: With dead ends: 16830 [2021-02-19 17:19:16,300 INFO L226 Difference]: Without dead ends: 16789 [2021-02-19 17:19:16,300 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16789 states. [2021-02-19 17:19:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16789 to 15696. [2021-02-19 17:19:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15696 states, 15695 states have (on average 2.603185727938834) internal successors, (40857), 15695 states have internal predecessors, (40857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:16,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15696 states to 15696 states and 40857 transitions. [2021-02-19 17:19:16,534 INFO L78 Accepts]: Start accepts. Automaton has 15696 states and 40857 transitions. Word has length 50 [2021-02-19 17:19:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:16,534 INFO L480 AbstractCegarLoop]: Abstraction has 15696 states and 40857 transitions. [2021-02-19 17:19:16,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:16,534 INFO L276 IsEmpty]: Start isEmpty. Operand 15696 states and 40857 transitions. [2021-02-19 17:19:16,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:16,542 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:16,542 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:16,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:16,742 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:16,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:16,743 INFO L82 PathProgramCache]: Analyzing trace with hash 391944258, now seen corresponding path program 151 times [2021-02-19 17:19:16,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:16,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449506234] [2021-02-19 17:19:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:16,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449506234] [2021-02-19 17:19:16,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030990383] [2021-02-19 17:19:16,805 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:16,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:16,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:16,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:16,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:19:16,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787362559] [2021-02-19 17:19:16,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:19:16,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:19:16,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:16,910 INFO L87 Difference]: Start difference. First operand 15696 states and 40857 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:17,234 INFO L93 Difference]: Finished difference Result 16674 states and 42851 transitions. [2021-02-19 17:19:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:19:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 17:19:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:17,257 INFO L225 Difference]: With dead ends: 16674 [2021-02-19 17:19:17,258 INFO L226 Difference]: Without dead ends: 16637 [2021-02-19 17:19:17,258 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16637 states. [2021-02-19 17:19:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16637 to 15768. [2021-02-19 17:19:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15768 states, 15767 states have (on average 2.5999873152787467) internal successors, (40994), 15767 states have internal predecessors, (40994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15768 states to 15768 states and 40994 transitions. [2021-02-19 17:19:17,574 INFO L78 Accepts]: Start accepts. Automaton has 15768 states and 40994 transitions. Word has length 50 [2021-02-19 17:19:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:17,574 INFO L480 AbstractCegarLoop]: Abstraction has 15768 states and 40994 transitions. [2021-02-19 17:19:17,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand 15768 states and 40994 transitions. [2021-02-19 17:19:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:17,583 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:17,583 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:17,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-02-19 17:19:17,783 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:17,784 INFO L82 PathProgramCache]: Analyzing trace with hash 922219110, now seen corresponding path program 152 times [2021-02-19 17:19:17,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:17,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070492799] [2021-02-19 17:19:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:17,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070492799] [2021-02-19 17:19:17,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903530453] [2021-02-19 17:19:17,858 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:17,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:17,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:19:17,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:17,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 17:19:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36575970] [2021-02-19 17:19:17,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:19:17,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:17,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:19:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:17,974 INFO L87 Difference]: Start difference. First operand 15768 states and 40994 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:18,328 INFO L93 Difference]: Finished difference Result 16826 states and 43144 transitions. [2021-02-19 17:19:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:19:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 17:19:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:18,351 INFO L225 Difference]: With dead ends: 16826 [2021-02-19 17:19:18,351 INFO L226 Difference]: Without dead ends: 16787 [2021-02-19 17:19:18,352 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:19:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16787 states. [2021-02-19 17:19:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16787 to 15867. [2021-02-19 17:19:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15867 states, 15866 states have (on average 2.5954872053447624) internal successors, (41180), 15866 states have internal predecessors, (41180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15867 states to 15867 states and 41180 transitions. [2021-02-19 17:19:18,589 INFO L78 Accepts]: Start accepts. Automaton has 15867 states and 41180 transitions. Word has length 50 [2021-02-19 17:19:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:18,590 INFO L480 AbstractCegarLoop]: Abstraction has 15867 states and 41180 transitions. [2021-02-19 17:19:18,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15867 states and 41180 transitions. [2021-02-19 17:19:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:18,598 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:18,598 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:18,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-02-19 17:19:18,799 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:18,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1980912905, now seen corresponding path program 5 times [2021-02-19 17:19:18,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:18,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820486233] [2021-02-19 17:19:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:18,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820486233] [2021-02-19 17:19:18,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211408837] [2021-02-19 17:19:18,927 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:18,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:19:18,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:19:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:19,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:19,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-02-19 17:19:19,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472897171] [2021-02-19 17:19:19,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:19:19,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:19,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:19:19,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:19:19,169 INFO L87 Difference]: Start difference. First operand 15867 states and 41180 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:19,868 INFO L93 Difference]: Finished difference Result 15981 states and 41361 transitions. [2021-02-19 17:19:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:19:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 17:19:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:19,891 INFO L225 Difference]: With dead ends: 15981 [2021-02-19 17:19:19,891 INFO L226 Difference]: Without dead ends: 15863 [2021-02-19 17:19:19,892 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:19:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15863 states. [2021-02-19 17:19:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15863 to 15837. [2021-02-19 17:19:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15837 states, 15836 states have (on average 2.5957943925233646) internal successors, (41107), 15836 states have internal predecessors, (41107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15837 states to 15837 states and 41107 transitions. [2021-02-19 17:19:20,117 INFO L78 Accepts]: Start accepts. Automaton has 15837 states and 41107 transitions. Word has length 50 [2021-02-19 17:19:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:20,117 INFO L480 AbstractCegarLoop]: Abstraction has 15837 states and 41107 transitions. [2021-02-19 17:19:20,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:20,117 INFO L276 IsEmpty]: Start isEmpty. Operand 15837 states and 41107 transitions. [2021-02-19 17:19:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 17:19:20,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:20,126 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:20,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:20,326 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash 365630293, now seen corresponding path program 6 times [2021-02-19 17:19:20,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:20,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751415175] [2021-02-19 17:19:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:20,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751415175] [2021-02-19 17:19:20,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26446137] [2021-02-19 17:19:20,438 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:20,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:19:20,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:19:20,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:20,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:20,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 17:19:20,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973220761] [2021-02-19 17:19:20,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:19:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:19:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:19:20,654 INFO L87 Difference]: Start difference. First operand 15837 states and 41107 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:21,160 INFO L93 Difference]: Finished difference Result 15901 states and 41192 transitions. [2021-02-19 17:19:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:19:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 17:19:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:21,183 INFO L225 Difference]: With dead ends: 15901 [2021-02-19 17:19:21,183 INFO L226 Difference]: Without dead ends: 15807 [2021-02-19 17:19:21,184 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:19:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15807 states. [2021-02-19 17:19:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15807 to 15781. [2021-02-19 17:19:21,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15781 states, 15780 states have (on average 2.597148288973384) internal successors, (40983), 15780 states have internal predecessors, (40983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15781 states to 15781 states and 40983 transitions. [2021-02-19 17:19:21,427 INFO L78 Accepts]: Start accepts. Automaton has 15781 states and 40983 transitions. Word has length 50 [2021-02-19 17:19:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:21,427 INFO L480 AbstractCegarLoop]: Abstraction has 15781 states and 40983 transitions. [2021-02-19 17:19:21,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 15781 states and 40983 transitions. [2021-02-19 17:19:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:21,438 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:21,438 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:21,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-02-19 17:19:21,638 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:21,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:21,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2070322164, now seen corresponding path program 153 times [2021-02-19 17:19:21,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:21,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21105754] [2021-02-19 17:19:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:21,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21105754] [2021-02-19 17:19:21,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819683139] [2021-02-19 17:19:21,802 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:21,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:19:21,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:21,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:21,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:21,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-02-19 17:19:21,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934350697] [2021-02-19 17:19:21,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:19:21,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:21,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:19:21,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:19:21,933 INFO L87 Difference]: Start difference. First operand 15781 states and 40983 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) [2021-02-19 17:19:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:22,465 INFO L93 Difference]: Finished difference Result 18719 states and 47320 transitions. [2021-02-19 17:19:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:22,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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 53 [2021-02-19 17:19:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:22,490 INFO L225 Difference]: With dead ends: 18719 [2021-02-19 17:19:22,490 INFO L226 Difference]: Without dead ends: 18719 [2021-02-19 17:19:22,490 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:19:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18719 states. [2021-02-19 17:19:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18719 to 16149. [2021-02-19 17:19:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16149 states, 16148 states have (on average 2.5997646767401537) internal successors, (41981), 16148 states have internal predecessors, (41981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16149 states to 16149 states and 41981 transitions. [2021-02-19 17:19:22,741 INFO L78 Accepts]: Start accepts. Automaton has 16149 states and 41981 transitions. Word has length 53 [2021-02-19 17:19:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:22,741 INFO L480 AbstractCegarLoop]: Abstraction has 16149 states and 41981 transitions. [2021-02-19 17:19:22,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 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) [2021-02-19 17:19:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 16149 states and 41981 transitions. [2021-02-19 17:19:22,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:22,751 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:22,751 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:22,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:22,952 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:22,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:22,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1040519353, now seen corresponding path program 86 times [2021-02-19 17:19:22,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:22,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896947717] [2021-02-19 17:19:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:23,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896947717] [2021-02-19 17:19:23,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80937838] [2021-02-19 17:19:23,118 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:23,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:23,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:23,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:23,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:24,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:19:24,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-02-19 17:19:24,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:19:24,077 INFO L628 ElimStorePlain]: treesize reduction 19, result has 5.0 percent of original size [2021-02-19 17:19:24,077 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:19:24,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:19:24,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:1 [2021-02-19 17:19:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:24,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:24,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-02-19 17:19:24,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667623027] [2021-02-19 17:19:24,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 17:19:24,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:24,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 17:19:24,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:19:24,093 INFO L87 Difference]: Start difference. First operand 16149 states and 41981 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:37,732 INFO L93 Difference]: Finished difference Result 34514 states and 82893 transitions. [2021-02-19 17:19:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-02-19 17:19:37,733 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:19:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:37,786 INFO L225 Difference]: With dead ends: 34514 [2021-02-19 17:19:37,787 INFO L226 Difference]: Without dead ends: 33666 [2021-02-19 17:19:37,791 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=7737, Invalid=56525, Unknown=0, NotChecked=0, Total=64262 [2021-02-19 17:19:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33666 states. [2021-02-19 17:19:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33666 to 17615. [2021-02-19 17:19:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17615 states, 17614 states have (on average 2.6037810832292494) internal successors, (45863), 17614 states have internal predecessors, (45863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17615 states to 17615 states and 45863 transitions. [2021-02-19 17:19:38,228 INFO L78 Accepts]: Start accepts. Automaton has 17615 states and 45863 transitions. Word has length 53 [2021-02-19 17:19:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:38,228 INFO L480 AbstractCegarLoop]: Abstraction has 17615 states and 45863 transitions. [2021-02-19 17:19:38,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 17615 states and 45863 transitions. [2021-02-19 17:19:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:38,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:38,239 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:38,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-02-19 17:19:38,440 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:38,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1015136760, now seen corresponding path program 154 times [2021-02-19 17:19:38,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:38,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205603335] [2021-02-19 17:19:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:38,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205603335] [2021-02-19 17:19:38,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587400452] [2021-02-19 17:19:38,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:38,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:38,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:38,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:38,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:38,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:19:38,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507013534] [2021-02-19 17:19:38,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:38,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:38,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:38,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:38,653 INFO L87 Difference]: Start difference. First operand 17615 states and 45863 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:19:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:38,880 INFO L93 Difference]: Finished difference Result 19186 states and 48955 transitions. [2021-02-19 17:19:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:19:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 53 [2021-02-19 17:19:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:38,905 INFO L225 Difference]: With dead ends: 19186 [2021-02-19 17:19:38,906 INFO L226 Difference]: Without dead ends: 19183 [2021-02-19 17:19:38,906 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:19:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19183 states. [2021-02-19 17:19:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19183 to 17296. [2021-02-19 17:19:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17296 states, 17295 states have (on average 2.599595258745302) internal successors, (44960), 17295 states have internal predecessors, (44960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17296 states to 17296 states and 44960 transitions. [2021-02-19 17:19:39,173 INFO L78 Accepts]: Start accepts. Automaton has 17296 states and 44960 transitions. Word has length 53 [2021-02-19 17:19:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:39,173 INFO L480 AbstractCegarLoop]: Abstraction has 17296 states and 44960 transitions. [2021-02-19 17:19:39,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:19:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 17296 states and 44960 transitions. [2021-02-19 17:19:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:39,184 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:39,184 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:39,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-02-19 17:19:39,384 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:39,384 INFO L82 PathProgramCache]: Analyzing trace with hash 521259350, now seen corresponding path program 155 times [2021-02-19 17:19:39,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:39,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348391453] [2021-02-19 17:19:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 77 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348391453] [2021-02-19 17:19:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424773868] [2021-02-19 17:19:39,468 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:39,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:19:39,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:39,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:39,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:39,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:39,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2021-02-19 17:19:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144534046] [2021-02-19 17:19:39,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:19:39,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:39,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:19:39,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:19:39,635 INFO L87 Difference]: Start difference. First operand 17296 states and 44960 transitions. Second operand has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:40,026 INFO L93 Difference]: Finished difference Result 19024 states and 48657 transitions. [2021-02-19 17:19:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:40,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:19:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:40,050 INFO L225 Difference]: With dead ends: 19024 [2021-02-19 17:19:40,051 INFO L226 Difference]: Without dead ends: 19012 [2021-02-19 17:19:40,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:19:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19012 states. [2021-02-19 17:19:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19012 to 17296. [2021-02-19 17:19:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17296 states, 17295 states have (on average 2.599248337669847) internal successors, (44954), 17295 states have internal predecessors, (44954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17296 states to 17296 states and 44954 transitions. [2021-02-19 17:19:40,337 INFO L78 Accepts]: Start accepts. Automaton has 17296 states and 44954 transitions. Word has length 53 [2021-02-19 17:19:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:40,337 INFO L480 AbstractCegarLoop]: Abstraction has 17296 states and 44954 transitions. [2021-02-19 17:19:40,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 17296 states and 44954 transitions. [2021-02-19 17:19:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:40,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:40,349 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:40,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:40,549 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2009696071, now seen corresponding path program 156 times [2021-02-19 17:19:40,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:40,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627307815] [2021-02-19 17:19:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:40,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627307815] [2021-02-19 17:19:40,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087834699] [2021-02-19 17:19:40,708 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:40,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:19:40,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:19:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:41,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:41,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-02-19 17:19:41,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261431866] [2021-02-19 17:19:41,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:19:41,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:41,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:19:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:41,095 INFO L87 Difference]: Start difference. First operand 17296 states and 44954 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:42,144 INFO L93 Difference]: Finished difference Result 17603 states and 45498 transitions. [2021-02-19 17:19:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:19:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:19:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:42,169 INFO L225 Difference]: With dead ends: 17603 [2021-02-19 17:19:42,169 INFO L226 Difference]: Without dead ends: 17301 [2021-02-19 17:19:42,169 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17301 states. [2021-02-19 17:19:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17301 to 17150. [2021-02-19 17:19:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17150 states, 17149 states have (on average 2.595195055105254) internal successors, (44505), 17149 states have internal predecessors, (44505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17150 states to 17150 states and 44505 transitions. [2021-02-19 17:19:42,433 INFO L78 Accepts]: Start accepts. Automaton has 17150 states and 44505 transitions. Word has length 53 [2021-02-19 17:19:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:42,433 INFO L480 AbstractCegarLoop]: Abstraction has 17150 states and 44505 transitions. [2021-02-19 17:19:42,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17150 states and 44505 transitions. [2021-02-19 17:19:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:42,444 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:42,444 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:42,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:42,644 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:42,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1609870278, now seen corresponding path program 87 times [2021-02-19 17:19:42,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:42,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773832924] [2021-02-19 17:19:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 79 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:42,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773832924] [2021-02-19 17:19:42,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376404597] [2021-02-19 17:19:42,722 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:42,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:19:42,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:42,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:42,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:42,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:42,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:19:42,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563012813] [2021-02-19 17:19:42,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:19:42,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:42,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:19:42,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:19:42,859 INFO L87 Difference]: Start difference. First operand 17150 states and 44505 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:19:43,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:43,099 INFO L93 Difference]: Finished difference Result 22414 states and 56326 transitions. [2021-02-19 17:19:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:19:43,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 53 [2021-02-19 17:19:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:43,128 INFO L225 Difference]: With dead ends: 22414 [2021-02-19 17:19:43,128 INFO L226 Difference]: Without dead ends: 22414 [2021-02-19 17:19:43,128 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:19:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22414 states. [2021-02-19 17:19:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22414 to 18186. [2021-02-19 17:19:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18186 states, 18185 states have (on average 2.617596920538906) internal successors, (47601), 18185 states have internal predecessors, (47601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18186 states to 18186 states and 47601 transitions. [2021-02-19 17:19:43,452 INFO L78 Accepts]: Start accepts. Automaton has 18186 states and 47601 transitions. Word has length 53 [2021-02-19 17:19:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:43,453 INFO L480 AbstractCegarLoop]: Abstraction has 18186 states and 47601 transitions. [2021-02-19 17:19:43,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:19:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 18186 states and 47601 transitions. [2021-02-19 17:19:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:43,464 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:43,464 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:43,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:43,665 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1194965221, now seen corresponding path program 88 times [2021-02-19 17:19:43,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:43,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63964728] [2021-02-19 17:19:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:43,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63964728] [2021-02-19 17:19:43,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091959031] [2021-02-19 17:19:43,765 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:43,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:43,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:43,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:19:43,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:43,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:43,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:19:43,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077180593] [2021-02-19 17:19:43,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:43,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:43,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:43,890 INFO L87 Difference]: Start difference. First operand 18186 states and 47601 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:19:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:44,416 INFO L93 Difference]: Finished difference Result 20262 states and 51992 transitions. [2021-02-19 17:19:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 53 [2021-02-19 17:19:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:44,442 INFO L225 Difference]: With dead ends: 20262 [2021-02-19 17:19:44,442 INFO L226 Difference]: Without dead ends: 20211 [2021-02-19 17:19:44,442 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:19:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20211 states. [2021-02-19 17:19:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20211 to 18617. [2021-02-19 17:19:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18617 states, 18616 states have (on average 2.613289643317576) internal successors, (48649), 18616 states have internal predecessors, (48649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18617 states to 18617 states and 48649 transitions. [2021-02-19 17:19:44,766 INFO L78 Accepts]: Start accepts. Automaton has 18617 states and 48649 transitions. Word has length 53 [2021-02-19 17:19:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:44,766 INFO L480 AbstractCegarLoop]: Abstraction has 18617 states and 48649 transitions. [2021-02-19 17:19:44,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:19:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 18617 states and 48649 transitions. [2021-02-19 17:19:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:44,777 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:44,777 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:44,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-02-19 17:19:44,977 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:44,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash -358731636, now seen corresponding path program 157 times [2021-02-19 17:19:44,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:44,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569552329] [2021-02-19 17:19:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:45,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569552329] [2021-02-19 17:19:45,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741415167] [2021-02-19 17:19:45,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:45,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:45,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:19:45,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385350350] [2021-02-19 17:19:45,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:19:45,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:19:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:19:45,173 INFO L87 Difference]: Start difference. First operand 18617 states and 48649 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:19:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:45,396 INFO L93 Difference]: Finished difference Result 20664 states and 52847 transitions. [2021-02-19 17:19:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:19:45,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 53 [2021-02-19 17:19:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:45,425 INFO L225 Difference]: With dead ends: 20664 [2021-02-19 17:19:45,425 INFO L226 Difference]: Without dead ends: 20661 [2021-02-19 17:19:45,425 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20661 states. [2021-02-19 17:19:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20661 to 18591. [2021-02-19 17:19:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18591 states, 18590 states have (on average 2.611888111888112) internal successors, (48555), 18590 states have internal predecessors, (48555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18591 states to 18591 states and 48555 transitions. [2021-02-19 17:19:45,761 INFO L78 Accepts]: Start accepts. Automaton has 18591 states and 48555 transitions. Word has length 53 [2021-02-19 17:19:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:45,762 INFO L480 AbstractCegarLoop]: Abstraction has 18591 states and 48555 transitions. [2021-02-19 17:19:45,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:19:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 18591 states and 48555 transitions. [2021-02-19 17:19:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:45,774 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:45,774 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:45,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-02-19 17:19:45,974 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:45,975 INFO L82 PathProgramCache]: Analyzing trace with hash -151669070, now seen corresponding path program 158 times [2021-02-19 17:19:45,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:45,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919206454] [2021-02-19 17:19:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:46,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919206454] [2021-02-19 17:19:46,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033435605] [2021-02-19 17:19:46,052 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:46,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:46,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:46,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:46,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:46,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:46,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:19:46,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772368822] [2021-02-19 17:19:46,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:46,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:46,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:46,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:46,184 INFO L87 Difference]: Start difference. First operand 18591 states and 48555 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:46,473 INFO L93 Difference]: Finished difference Result 20671 states and 52797 transitions. [2021-02-19 17:19:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:19:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:19:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:46,503 INFO L225 Difference]: With dead ends: 20671 [2021-02-19 17:19:46,503 INFO L226 Difference]: Without dead ends: 20653 [2021-02-19 17:19:46,503 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:19:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20653 states. [2021-02-19 17:19:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20653 to 18428. [2021-02-19 17:19:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 18427 states have (on average 2.603245237966028) internal successors, (47970), 18427 states have internal predecessors, (47970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 47970 transitions. [2021-02-19 17:19:46,829 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 47970 transitions. Word has length 53 [2021-02-19 17:19:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:46,829 INFO L480 AbstractCegarLoop]: Abstraction has 18428 states and 47970 transitions. [2021-02-19 17:19:46,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 47970 transitions. [2021-02-19 17:19:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:46,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:46,841 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:47,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-02-19 17:19:47,042 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:47,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:47,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1599669083, now seen corresponding path program 159 times [2021-02-19 17:19:47,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:47,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034098218] [2021-02-19 17:19:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:47,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034098218] [2021-02-19 17:19:47,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101736260] [2021-02-19 17:19:47,141 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:47,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:19:47,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:19:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:47,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:47,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:19:47,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211358289] [2021-02-19 17:19:47,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:47,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:47,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:47,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:47,298 INFO L87 Difference]: Start difference. First operand 18428 states and 47970 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:19:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:48,030 INFO L93 Difference]: Finished difference Result 19276 states and 49538 transitions. [2021-02-19 17:19:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:48,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 53 [2021-02-19 17:19:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:48,053 INFO L225 Difference]: With dead ends: 19276 [2021-02-19 17:19:48,054 INFO L226 Difference]: Without dead ends: 19220 [2021-02-19 17:19:48,054 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:19:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19220 states. [2021-02-19 17:19:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19220 to 18392. [2021-02-19 17:19:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18392 states, 18391 states have (on average 2.6025773476156817) internal successors, (47864), 18391 states have internal predecessors, (47864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18392 states to 18392 states and 47864 transitions. [2021-02-19 17:19:48,324 INFO L78 Accepts]: Start accepts. Automaton has 18392 states and 47864 transitions. Word has length 53 [2021-02-19 17:19:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:48,324 INFO L480 AbstractCegarLoop]: Abstraction has 18392 states and 47864 transitions. [2021-02-19 17:19:48,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:19:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 18392 states and 47864 transitions. [2021-02-19 17:19:48,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:48,335 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:48,335 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:48,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:48,536 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:48,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2081762033, now seen corresponding path program 160 times [2021-02-19 17:19:48,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:48,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18347690] [2021-02-19 17:19:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:48,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18347690] [2021-02-19 17:19:48,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399618501] [2021-02-19 17:19:48,642 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:48,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:48,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:48,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:19:48,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:48,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:48,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:19:48,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557659723] [2021-02-19 17:19:48,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:48,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:48,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:48,770 INFO L87 Difference]: Start difference. First operand 18392 states and 47864 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:19:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:49,339 INFO L93 Difference]: Finished difference Result 19509 states and 50084 transitions. [2021-02-19 17:19:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 53 [2021-02-19 17:19:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:49,368 INFO L225 Difference]: With dead ends: 19509 [2021-02-19 17:19:49,368 INFO L226 Difference]: Without dead ends: 19468 [2021-02-19 17:19:49,369 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:19:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19468 states. [2021-02-19 17:19:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19468 to 18191. [2021-02-19 17:19:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18191 states, 18190 states have (on average 2.604068169323804) internal successors, (47368), 18190 states have internal predecessors, (47368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 47368 transitions. [2021-02-19 17:19:49,676 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 47368 transitions. Word has length 53 [2021-02-19 17:19:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:49,676 INFO L480 AbstractCegarLoop]: Abstraction has 18191 states and 47368 transitions. [2021-02-19 17:19:49,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:19:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 47368 transitions. [2021-02-19 17:19:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:49,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:49,688 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:49,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:49,889 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash -71287929, now seen corresponding path program 161 times [2021-02-19 17:19:49,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:49,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548151763] [2021-02-19 17:19:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:49,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548151763] [2021-02-19 17:19:49,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389598371] [2021-02-19 17:19:49,991 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:50,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:19:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:19:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:50,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:50,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:19:50,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566820603] [2021-02-19 17:19:50,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:19:50,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:50,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:19:50,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:19:50,126 INFO L87 Difference]: Start difference. First operand 18191 states and 47368 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 17:19:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:50,787 INFO L93 Difference]: Finished difference Result 19866 states and 50762 transitions. [2021-02-19 17:19:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:50,788 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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 53 [2021-02-19 17:19:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:50,817 INFO L225 Difference]: With dead ends: 19866 [2021-02-19 17:19:50,817 INFO L226 Difference]: Without dead ends: 19854 [2021-02-19 17:19:50,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19854 states. [2021-02-19 17:19:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19854 to 18226. [2021-02-19 17:19:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18226 states, 18225 states have (on average 2.603731138545953) internal successors, (47453), 18225 states have internal predecessors, (47453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18226 states to 18226 states and 47453 transitions. [2021-02-19 17:19:51,181 INFO L78 Accepts]: Start accepts. Automaton has 18226 states and 47453 transitions. Word has length 53 [2021-02-19 17:19:51,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:51,181 INFO L480 AbstractCegarLoop]: Abstraction has 18226 states and 47453 transitions. [2021-02-19 17:19:51,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2021-02-19 17:19:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 18226 states and 47453 transitions. [2021-02-19 17:19:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:51,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:51,192 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:51,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:51,393 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:51,393 INFO L82 PathProgramCache]: Analyzing trace with hash -309349446, now seen corresponding path program 89 times [2021-02-19 17:19:51,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:51,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283456154] [2021-02-19 17:19:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:51,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283456154] [2021-02-19 17:19:51,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663378537] [2021-02-19 17:19:51,468 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:51,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:19:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:51,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:51,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-02-19 17:19:51,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050440962] [2021-02-19 17:19:51,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:19:51,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:19:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:19:51,617 INFO L87 Difference]: Start difference. First operand 18226 states and 47453 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:51,923 INFO L93 Difference]: Finished difference Result 22269 states and 55820 transitions. [2021-02-19 17:19:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:19:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:19:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:51,953 INFO L225 Difference]: With dead ends: 22269 [2021-02-19 17:19:51,953 INFO L226 Difference]: Without dead ends: 22261 [2021-02-19 17:19:51,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:19:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22261 states. [2021-02-19 17:19:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22261 to 18490. [2021-02-19 17:19:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18490 states, 18489 states have (on average 2.6109578668397426) internal successors, (48274), 18489 states have internal predecessors, (48274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18490 states to 18490 states and 48274 transitions. [2021-02-19 17:19:52,295 INFO L78 Accepts]: Start accepts. Automaton has 18490 states and 48274 transitions. Word has length 53 [2021-02-19 17:19:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:52,296 INFO L480 AbstractCegarLoop]: Abstraction has 18490 states and 48274 transitions. [2021-02-19 17:19:52,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 18490 states and 48274 transitions. [2021-02-19 17:19:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:52,308 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:52,308 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:52,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:52,508 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash -931229856, now seen corresponding path program 90 times [2021-02-19 17:19:52,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:52,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179619335] [2021-02-19 17:19:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:19:52,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179619335] [2021-02-19 17:19:52,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054090813] [2021-02-19 17:19:52,587 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:52,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:19:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:52,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:52,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-02-19 17:19:52,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940468986] [2021-02-19 17:19:52,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:19:52,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:19:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:19:52,740 INFO L87 Difference]: Start difference. First operand 18490 states and 48274 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:53,030 INFO L93 Difference]: Finished difference Result 24326 states and 60671 transitions. [2021-02-19 17:19:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:19:53,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:19:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:53,063 INFO L225 Difference]: With dead ends: 24326 [2021-02-19 17:19:53,063 INFO L226 Difference]: Without dead ends: 24326 [2021-02-19 17:19:53,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:19:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24326 states. [2021-02-19 17:19:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24326 to 18498. [2021-02-19 17:19:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18498 states, 18497 states have (on average 2.6108558144563982) internal successors, (48293), 18497 states have internal predecessors, (48293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18498 states to 18498 states and 48293 transitions. [2021-02-19 17:19:53,407 INFO L78 Accepts]: Start accepts. Automaton has 18498 states and 48293 transitions. Word has length 53 [2021-02-19 17:19:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:53,407 INFO L480 AbstractCegarLoop]: Abstraction has 18498 states and 48293 transitions. [2021-02-19 17:19:53,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 18498 states and 48293 transitions. [2021-02-19 17:19:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:53,418 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:53,419 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:53,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-02-19 17:19:53,619 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:53,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1726164984, now seen corresponding path program 91 times [2021-02-19 17:19:53,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:53,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545415807] [2021-02-19 17:19:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:53,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545415807] [2021-02-19 17:19:53,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396664081] [2021-02-19 17:19:53,716 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:53,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:53,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:53,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:19:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876498535] [2021-02-19 17:19:53,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:19:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:19:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:19:53,850 INFO L87 Difference]: Start difference. First operand 18498 states and 48293 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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) [2021-02-19 17:19:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:54,137 INFO L93 Difference]: Finished difference Result 22558 states and 56564 transitions. [2021-02-19 17:19:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:19:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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 53 [2021-02-19 17:19:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:54,168 INFO L225 Difference]: With dead ends: 22558 [2021-02-19 17:19:54,168 INFO L226 Difference]: Without dead ends: 22558 [2021-02-19 17:19:54,168 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:19:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22558 states. [2021-02-19 17:19:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22558 to 18322. [2021-02-19 17:19:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18322 states, 18321 states have (on average 2.6065716936848426) internal successors, (47755), 18321 states have internal predecessors, (47755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18322 states to 18322 states and 47755 transitions. [2021-02-19 17:19:54,514 INFO L78 Accepts]: Start accepts. Automaton has 18322 states and 47755 transitions. Word has length 53 [2021-02-19 17:19:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:54,514 INFO L480 AbstractCegarLoop]: Abstraction has 18322 states and 47755 transitions. [2021-02-19 17:19:54,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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) [2021-02-19 17:19:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 18322 states and 47755 transitions. [2021-02-19 17:19:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:54,525 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:54,525 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:54,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-02-19 17:19:54,726 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:54,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1461271180, now seen corresponding path program 162 times [2021-02-19 17:19:54,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:54,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104008395] [2021-02-19 17:19:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:54,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104008395] [2021-02-19 17:19:54,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128334981] [2021-02-19 17:19:54,811 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:54,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:19:54,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:54,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:54,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:54,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:54,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:19:54,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358335424] [2021-02-19 17:19:54,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:19:54,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:54,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:19:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:19:54,938 INFO L87 Difference]: Start difference. First operand 18322 states and 47755 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:19:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:55,171 INFO L93 Difference]: Finished difference Result 19963 states and 51076 transitions. [2021-02-19 17:19:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:19:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 53 [2021-02-19 17:19:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:55,200 INFO L225 Difference]: With dead ends: 19963 [2021-02-19 17:19:55,200 INFO L226 Difference]: Without dead ends: 19945 [2021-02-19 17:19:55,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:19:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19945 states. [2021-02-19 17:19:55,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19945 to 18322. [2021-02-19 17:19:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18322 states, 18321 states have (on average 2.606025871950221) internal successors, (47745), 18321 states have internal predecessors, (47745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18322 states to 18322 states and 47745 transitions. [2021-02-19 17:19:55,506 INFO L78 Accepts]: Start accepts. Automaton has 18322 states and 47745 transitions. Word has length 53 [2021-02-19 17:19:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:55,506 INFO L480 AbstractCegarLoop]: Abstraction has 18322 states and 47745 transitions. [2021-02-19 17:19:55,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:19:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 18322 states and 47745 transitions. [2021-02-19 17:19:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:55,518 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:55,518 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:55,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-02-19 17:19:55,719 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:55,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1403224567, now seen corresponding path program 92 times [2021-02-19 17:19:55,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:55,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780583961] [2021-02-19 17:19:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:55,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780583961] [2021-02-19 17:19:55,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793260644] [2021-02-19 17:19:55,826 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:55,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:55,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:55,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:19:55,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:55,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:55,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:19:55,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397949369] [2021-02-19 17:19:55,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:55,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:55,955 INFO L87 Difference]: Start difference. First operand 18322 states and 47745 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:19:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:56,554 INFO L93 Difference]: Finished difference Result 20315 states and 51884 transitions. [2021-02-19 17:19:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 53 [2021-02-19 17:19:56,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:56,580 INFO L225 Difference]: With dead ends: 20315 [2021-02-19 17:19:56,580 INFO L226 Difference]: Without dead ends: 20272 [2021-02-19 17:19:56,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:19:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20272 states. [2021-02-19 17:19:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20272 to 18608. [2021-02-19 17:19:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18608 states, 18607 states have (on average 2.6038587628311927) internal successors, (48450), 18607 states have internal predecessors, (48450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18608 states to 18608 states and 48450 transitions. [2021-02-19 17:19:56,909 INFO L78 Accepts]: Start accepts. Automaton has 18608 states and 48450 transitions. Word has length 53 [2021-02-19 17:19:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:56,909 INFO L480 AbstractCegarLoop]: Abstraction has 18608 states and 48450 transitions. [2021-02-19 17:19:56,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:19:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 18608 states and 48450 transitions. [2021-02-19 17:19:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:56,921 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:56,921 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:57,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-02-19 17:19:57,122 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:57,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1338045872, now seen corresponding path program 163 times [2021-02-19 17:19:57,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:57,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340298977] [2021-02-19 17:19:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:57,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340298977] [2021-02-19 17:19:57,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87730677] [2021-02-19 17:19:57,201 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:19:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:57,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:57,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:57,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:57,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:19:57,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649147155] [2021-02-19 17:19:57,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:19:57,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:57,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:19:57,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:19:57,327 INFO L87 Difference]: Start difference. First operand 18608 states and 48450 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:19:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:57,589 INFO L93 Difference]: Finished difference Result 20701 states and 52634 transitions. [2021-02-19 17:19:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:19:57,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 53 [2021-02-19 17:19:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:57,617 INFO L225 Difference]: With dead ends: 20701 [2021-02-19 17:19:57,618 INFO L226 Difference]: Without dead ends: 20698 [2021-02-19 17:19:57,618 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20698 states. [2021-02-19 17:19:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20698 to 18588. [2021-02-19 17:19:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18588 states, 18587 states have (on average 2.602571689890784) internal successors, (48374), 18587 states have internal predecessors, (48374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18588 states to 18588 states and 48374 transitions. [2021-02-19 17:19:57,919 INFO L78 Accepts]: Start accepts. Automaton has 18588 states and 48374 transitions. Word has length 53 [2021-02-19 17:19:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:57,919 INFO L480 AbstractCegarLoop]: Abstraction has 18588 states and 48374 transitions. [2021-02-19 17:19:57,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:19:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 18588 states and 48374 transitions. [2021-02-19 17:19:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:57,930 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:57,930 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:58,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:58,131 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:58,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1545108438, now seen corresponding path program 164 times [2021-02-19 17:19:58,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:58,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081834273] [2021-02-19 17:19:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:58,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081834273] [2021-02-19 17:19:58,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781577511] [2021-02-19 17:19:58,204 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:58,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:58,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:58,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:19:58,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:19:58,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:58,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:19:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183749152] [2021-02-19 17:19:58,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:58,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:58,327 INFO L87 Difference]: Start difference. First operand 18588 states and 48374 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:58,601 INFO L93 Difference]: Finished difference Result 20717 states and 52607 transitions. [2021-02-19 17:19:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:19:58,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:19:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:58,629 INFO L225 Difference]: With dead ends: 20717 [2021-02-19 17:19:58,629 INFO L226 Difference]: Without dead ends: 20699 [2021-02-19 17:19:58,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:19:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20699 states. [2021-02-19 17:19:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20699 to 18588. [2021-02-19 17:19:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18588 states, 18587 states have (on average 2.6012804648410177) internal successors, (48350), 18587 states have internal predecessors, (48350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18588 states to 18588 states and 48350 transitions. [2021-02-19 17:19:58,940 INFO L78 Accepts]: Start accepts. Automaton has 18588 states and 48350 transitions. Word has length 53 [2021-02-19 17:19:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:58,940 INFO L480 AbstractCegarLoop]: Abstraction has 18588 states and 48350 transitions. [2021-02-19 17:19:58,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 18588 states and 48350 transitions. [2021-02-19 17:19:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:19:58,951 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:58,951 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:59,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:59,152 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash 97108425, now seen corresponding path program 165 times [2021-02-19 17:19:59,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:59,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839101915] [2021-02-19 17:19:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:59,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839101915] [2021-02-19 17:19:59,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214714370] [2021-02-19 17:19:59,249 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:59,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 17:19:59,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:19:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:59,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:19:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772427143] [2021-02-19 17:19:59,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:19:59,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:19:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:19:59,394 INFO L87 Difference]: Start difference. First operand 18588 states and 48350 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:20:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:00,175 INFO L93 Difference]: Finished difference Result 19474 states and 49972 transitions. [2021-02-19 17:20:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:00,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 53 [2021-02-19 17:20:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:00,204 INFO L225 Difference]: With dead ends: 19474 [2021-02-19 17:20:00,204 INFO L226 Difference]: Without dead ends: 19406 [2021-02-19 17:20:00,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19406 states. [2021-02-19 17:20:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19406 to 18555. [2021-02-19 17:20:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18555 states, 18554 states have (on average 2.5994933707017354) internal successors, (48231), 18554 states have internal predecessors, (48231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18555 states to 18555 states and 48231 transitions. [2021-02-19 17:20:00,589 INFO L78 Accepts]: Start accepts. Automaton has 18555 states and 48231 transitions. Word has length 53 [2021-02-19 17:20:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:00,589 INFO L480 AbstractCegarLoop]: Abstraction has 18555 states and 48231 transitions. [2021-02-19 17:20:00,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:20:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 18555 states and 48231 transitions. [2021-02-19 17:20:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:00,601 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:00,601 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:00,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:00,802 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:00,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash -516427755, now seen corresponding path program 166 times [2021-02-19 17:20:00,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:00,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321578883] [2021-02-19 17:20:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:00,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321578883] [2021-02-19 17:20:00,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108126458] [2021-02-19 17:20:00,902 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:00,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:00,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:00,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:00,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:01,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:01,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:20:01,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54883481] [2021-02-19 17:20:01,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:01,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:01,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:01,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:01,027 INFO L87 Difference]: Start difference. First operand 18555 states and 48231 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:20:01,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:01,571 INFO L93 Difference]: Finished difference Result 19852 states and 50816 transitions. [2021-02-19 17:20:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:01,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 53 [2021-02-19 17:20:01,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:01,599 INFO L225 Difference]: With dead ends: 19852 [2021-02-19 17:20:01,599 INFO L226 Difference]: Without dead ends: 19804 [2021-02-19 17:20:01,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19804 states. [2021-02-19 17:20:01,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19804 to 18355. [2021-02-19 17:20:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18355 states, 18354 states have (on average 2.601176855181432) internal successors, (47742), 18354 states have internal predecessors, (47742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18355 states to 18355 states and 47742 transitions. [2021-02-19 17:20:01,901 INFO L78 Accepts]: Start accepts. Automaton has 18355 states and 47742 transitions. Word has length 53 [2021-02-19 17:20:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:01,901 INFO L480 AbstractCegarLoop]: Abstraction has 18355 states and 47742 transitions. [2021-02-19 17:20:01,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:20:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18355 states and 47742 transitions. [2021-02-19 17:20:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:01,913 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:01,913 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:02,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:02,113 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1625489579, now seen corresponding path program 167 times [2021-02-19 17:20:02,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:02,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640443398] [2021-02-19 17:20:02,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:02,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640443398] [2021-02-19 17:20:02,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690065190] [2021-02-19 17:20:02,228 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:02,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:20:02,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:02,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:02,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:02,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:02,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:20:02,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133867246] [2021-02-19 17:20:02,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:02,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:02,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:02,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:02,370 INFO L87 Difference]: Start difference. First operand 18355 states and 47742 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-02-19 17:20:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:03,084 INFO L93 Difference]: Finished difference Result 20976 states and 53276 transitions. [2021-02-19 17:20:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:20:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 53 [2021-02-19 17:20:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:03,114 INFO L225 Difference]: With dead ends: 20976 [2021-02-19 17:20:03,114 INFO L226 Difference]: Without dead ends: 20934 [2021-02-19 17:20:03,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:20:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20934 states. [2021-02-19 17:20:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20934 to 18408. [2021-02-19 17:20:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18408 states, 18407 states have (on average 2.6013473135220297) internal successors, (47883), 18407 states have internal predecessors, (47883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18408 states to 18408 states and 47883 transitions. [2021-02-19 17:20:03,425 INFO L78 Accepts]: Start accepts. Automaton has 18408 states and 47883 transitions. Word has length 53 [2021-02-19 17:20:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:03,425 INFO L480 AbstractCegarLoop]: Abstraction has 18408 states and 47883 transitions. [2021-02-19 17:20:03,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-02-19 17:20:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 18408 states and 47883 transitions. [2021-02-19 17:20:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:03,436 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:03,436 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:03,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-02-19 17:20:03,637 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1136918608, now seen corresponding path program 168 times [2021-02-19 17:20:03,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:03,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121237100] [2021-02-19 17:20:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:03,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121237100] [2021-02-19 17:20:03,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691421689] [2021-02-19 17:20:03,737 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:03,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:20:03,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:03,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:03,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:20:03,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878239696] [2021-02-19 17:20:03,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:03,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:03,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:03,868 INFO L87 Difference]: Start difference. First operand 18408 states and 47883 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:20:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:04,192 INFO L93 Difference]: Finished difference Result 20776 states and 52686 transitions. [2021-02-19 17:20:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:20:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 53 [2021-02-19 17:20:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:04,216 INFO L225 Difference]: With dead ends: 20776 [2021-02-19 17:20:04,216 INFO L226 Difference]: Without dead ends: 20752 [2021-02-19 17:20:04,216 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:20:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20752 states. [2021-02-19 17:20:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20752 to 18041. [2021-02-19 17:20:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18041 states, 18040 states have (on average 2.5951219512195123) internal successors, (46816), 18040 states have internal predecessors, (46816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18041 states to 18041 states and 46816 transitions. [2021-02-19 17:20:04,490 INFO L78 Accepts]: Start accepts. Automaton has 18041 states and 46816 transitions. Word has length 53 [2021-02-19 17:20:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:04,491 INFO L480 AbstractCegarLoop]: Abstraction has 18041 states and 46816 transitions. [2021-02-19 17:20:04,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:20:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 18041 states and 46816 transitions. [2021-02-19 17:20:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:04,502 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:04,502 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:04,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-02-19 17:20:04,702 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1780326113, now seen corresponding path program 169 times [2021-02-19 17:20:04,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:04,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064827751] [2021-02-19 17:20:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:04,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064827751] [2021-02-19 17:20:04,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234773498] [2021-02-19 17:20:04,808 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:04,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:04,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:20:04,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958913007] [2021-02-19 17:20:04,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:20:04,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:04,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:20:04,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:04,930 INFO L87 Difference]: Start difference. First operand 18041 states and 46816 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-02-19 17:20:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:05,651 INFO L93 Difference]: Finished difference Result 21002 states and 53015 transitions. [2021-02-19 17:20:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:20:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 53 [2021-02-19 17:20:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:05,683 INFO L225 Difference]: With dead ends: 21002 [2021-02-19 17:20:05,683 INFO L226 Difference]: Without dead ends: 20948 [2021-02-19 17:20:05,683 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:20:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20948 states. [2021-02-19 17:20:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20948 to 18011. [2021-02-19 17:20:05,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18011 states, 18010 states have (on average 2.593225985563576) internal successors, (46704), 18010 states have internal predecessors, (46704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18011 states to 18011 states and 46704 transitions. [2021-02-19 17:20:05,983 INFO L78 Accepts]: Start accepts. Automaton has 18011 states and 46704 transitions. Word has length 53 [2021-02-19 17:20:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:05,983 INFO L480 AbstractCegarLoop]: Abstraction has 18011 states and 46704 transitions. [2021-02-19 17:20:05,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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) [2021-02-19 17:20:05,983 INFO L276 IsEmpty]: Start isEmpty. Operand 18011 states and 46704 transitions. [2021-02-19 17:20:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:05,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:05,995 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:06,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-02-19 17:20:06,195 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1542264596, now seen corresponding path program 93 times [2021-02-19 17:20:06,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:06,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121394206] [2021-02-19 17:20:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:06,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121394206] [2021-02-19 17:20:06,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826998859] [2021-02-19 17:20:06,265 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:06,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 17:20:06,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:06,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:06,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:20:06,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944943846] [2021-02-19 17:20:06,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:06,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:06,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:06,415 INFO L87 Difference]: Start difference. First operand 18011 states and 46704 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:20:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:06,677 INFO L93 Difference]: Finished difference Result 21439 states and 53755 transitions. [2021-02-19 17:20:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:20:06,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 53 [2021-02-19 17:20:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:06,706 INFO L225 Difference]: With dead ends: 21439 [2021-02-19 17:20:06,706 INFO L226 Difference]: Without dead ends: 21425 [2021-02-19 17:20:06,706 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21425 states. [2021-02-19 17:20:06,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21425 to 18294. [2021-02-19 17:20:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18294 states, 18293 states have (on average 2.597824304378724) internal successors, (47522), 18293 states have internal predecessors, (47522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18294 states to 18294 states and 47522 transitions. [2021-02-19 17:20:07,005 INFO L78 Accepts]: Start accepts. Automaton has 18294 states and 47522 transitions. Word has length 53 [2021-02-19 17:20:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:07,005 INFO L480 AbstractCegarLoop]: Abstraction has 18294 states and 47522 transitions. [2021-02-19 17:20:07,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:20:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 18294 states and 47522 transitions. [2021-02-19 17:20:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:07,094 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:07,094 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:07,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:07,295 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash 920384186, now seen corresponding path program 94 times [2021-02-19 17:20:07,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:07,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017073305] [2021-02-19 17:20:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:07,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017073305] [2021-02-19 17:20:07,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504329713] [2021-02-19 17:20:07,368 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:07,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:07,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:07,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:07,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:20:07,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434006722] [2021-02-19 17:20:07,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:07,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:07,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:07,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:07,504 INFO L87 Difference]: Start difference. First operand 18294 states and 47522 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:20:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:07,780 INFO L93 Difference]: Finished difference Result 24998 states and 62195 transitions. [2021-02-19 17:20:07,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:20:07,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 53 [2021-02-19 17:20:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:07,816 INFO L225 Difference]: With dead ends: 24998 [2021-02-19 17:20:07,817 INFO L226 Difference]: Without dead ends: 24998 [2021-02-19 17:20:07,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:20:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2021-02-19 17:20:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 18308. [2021-02-19 17:20:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18308 states, 18307 states have (on average 2.5978587425574915) internal successors, (47559), 18307 states have internal predecessors, (47559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18308 states to 18308 states and 47559 transitions. [2021-02-19 17:20:08,131 INFO L78 Accepts]: Start accepts. Automaton has 18308 states and 47559 transitions. Word has length 53 [2021-02-19 17:20:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:08,131 INFO L480 AbstractCegarLoop]: Abstraction has 18308 states and 47559 transitions. [2021-02-19 17:20:08,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:20:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 18308 states and 47559 transitions. [2021-02-19 17:20:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:08,142 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:08,142 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:08,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:08,343 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:08,343 INFO L82 PathProgramCache]: Analyzing trace with hash -717188270, now seen corresponding path program 95 times [2021-02-19 17:20:08,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:08,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808654338] [2021-02-19 17:20:08,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808654338] [2021-02-19 17:20:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141687309] [2021-02-19 17:20:08,424 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:08,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:20:08,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:08,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:08,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:08,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:08,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-02-19 17:20:08,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813132865] [2021-02-19 17:20:08,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:20:08,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:08,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:20:08,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:20:08,635 INFO L87 Difference]: Start difference. First operand 18308 states and 47559 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:09,156 INFO L93 Difference]: Finished difference Result 25404 states and 63122 transitions. [2021-02-19 17:20:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:20:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:09,194 INFO L225 Difference]: With dead ends: 25404 [2021-02-19 17:20:09,194 INFO L226 Difference]: Without dead ends: 25404 [2021-02-19 17:20:09,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=445, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:20:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25404 states. [2021-02-19 17:20:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25404 to 18331. [2021-02-19 17:20:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18331 states, 18330 states have (on average 2.5983633387888707) internal successors, (47628), 18330 states have internal predecessors, (47628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18331 states to 18331 states and 47628 transitions. [2021-02-19 17:20:09,522 INFO L78 Accepts]: Start accepts. Automaton has 18331 states and 47628 transitions. Word has length 53 [2021-02-19 17:20:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:09,522 INFO L480 AbstractCegarLoop]: Abstraction has 18331 states and 47628 transitions. [2021-02-19 17:20:09,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 18331 states and 47628 transitions. [2021-02-19 17:20:09,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:09,533 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:09,533 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:09,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:09,733 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1887783862, now seen corresponding path program 96 times [2021-02-19 17:20:09,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:09,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470034643] [2021-02-19 17:20:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:09,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470034643] [2021-02-19 17:20:09,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602808677] [2021-02-19 17:20:09,836 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:09,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-02-19 17:20:09,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:09,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:20:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:10,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:10,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 16 [2021-02-19 17:20:10,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205923319] [2021-02-19 17:20:10,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:20:10,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:20:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:10,021 INFO L87 Difference]: Start difference. First operand 18331 states and 47628 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:10,402 INFO L93 Difference]: Finished difference Result 22236 states and 55674 transitions. [2021-02-19 17:20:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:10,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:10,492 INFO L225 Difference]: With dead ends: 22236 [2021-02-19 17:20:10,492 INFO L226 Difference]: Without dead ends: 22236 [2021-02-19 17:20:10,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:20:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22236 states. [2021-02-19 17:20:10,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22236 to 18084. [2021-02-19 17:20:10,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18084 states, 18083 states have (on average 2.594038599789858) internal successors, (46908), 18083 states have internal predecessors, (46908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18084 states to 18084 states and 46908 transitions. [2021-02-19 17:20:10,827 INFO L78 Accepts]: Start accepts. Automaton has 18084 states and 46908 transitions. Word has length 53 [2021-02-19 17:20:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:10,827 INFO L480 AbstractCegarLoop]: Abstraction has 18084 states and 46908 transitions. [2021-02-19 17:20:10,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18084 states and 46908 transitions. [2021-02-19 17:20:10,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:10,838 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:10,838 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:11,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-02-19 17:20:11,039 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2128038506, now seen corresponding path program 170 times [2021-02-19 17:20:11,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:11,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878797147] [2021-02-19 17:20:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878797147] [2021-02-19 17:20:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464661419] [2021-02-19 17:20:11,143 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:11,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:11,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:11,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:20:11,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630729847] [2021-02-19 17:20:11,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:20:11,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:11,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:20:11,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:11,284 INFO L87 Difference]: Start difference. First operand 18084 states and 46908 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) [2021-02-19 17:20:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:11,577 INFO L93 Difference]: Finished difference Result 20228 states and 51314 transitions. [2021-02-19 17:20:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:20:11,578 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 53 [2021-02-19 17:20:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:11,605 INFO L225 Difference]: With dead ends: 20228 [2021-02-19 17:20:11,605 INFO L226 Difference]: Without dead ends: 20201 [2021-02-19 17:20:11,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20201 states. [2021-02-19 17:20:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20201 to 18084. [2021-02-19 17:20:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18084 states, 18083 states have (on average 2.593540894763037) internal successors, (46899), 18083 states have internal predecessors, (46899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18084 states to 18084 states and 46899 transitions. [2021-02-19 17:20:11,921 INFO L78 Accepts]: Start accepts. Automaton has 18084 states and 46899 transitions. Word has length 53 [2021-02-19 17:20:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:11,921 INFO L480 AbstractCegarLoop]: Abstraction has 18084 states and 46899 transitions. [2021-02-19 17:20:11,922 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) [2021-02-19 17:20:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 18084 states and 46899 transitions. [2021-02-19 17:20:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:11,936 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:11,936 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:12,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-02-19 17:20:12,136 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:12,137 INFO L82 PathProgramCache]: Analyzing trace with hash 63471154, now seen corresponding path program 171 times [2021-02-19 17:20:12,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:12,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056920959] [2021-02-19 17:20:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:12,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056920959] [2021-02-19 17:20:12,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050984060] [2021-02-19 17:20:12,204 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:12,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-02-19 17:20:12,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:12,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:12,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:12,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:12,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:20:12,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275283906] [2021-02-19 17:20:12,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:20:12,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:12,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:20:12,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:20:12,349 INFO L87 Difference]: Start difference. First operand 18084 states and 46899 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:20:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:12,630 INFO L93 Difference]: Finished difference Result 25377 states and 63889 transitions. [2021-02-19 17:20:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:20:12,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 53 [2021-02-19 17:20:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:12,666 INFO L225 Difference]: With dead ends: 25377 [2021-02-19 17:20:12,666 INFO L226 Difference]: Without dead ends: 25377 [2021-02-19 17:20:12,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25377 states. [2021-02-19 17:20:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25377 to 18345. [2021-02-19 17:20:12,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18345 states, 18344 states have (on average 2.6009049280418663) internal successors, (47711), 18344 states have internal predecessors, (47711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18345 states to 18345 states and 47711 transitions. [2021-02-19 17:20:13,006 INFO L78 Accepts]: Start accepts. Automaton has 18345 states and 47711 transitions. Word has length 53 [2021-02-19 17:20:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:13,006 INFO L480 AbstractCegarLoop]: Abstraction has 18345 states and 47711 transitions. [2021-02-19 17:20:13,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:20:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 18345 states and 47711 transitions. [2021-02-19 17:20:13,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:13,016 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:13,017 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:13,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:13,217 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:13,217 INFO L82 PathProgramCache]: Analyzing trace with hash -174590363, now seen corresponding path program 97 times [2021-02-19 17:20:13,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:13,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655051323] [2021-02-19 17:20:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655051323] [2021-02-19 17:20:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193767872] [2021-02-19 17:20:13,333 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:13,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:13,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:13,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:20:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283081669] [2021-02-19 17:20:13,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:13,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:13,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:13,463 INFO L87 Difference]: Start difference. First operand 18345 states and 47711 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:20:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:14,062 INFO L93 Difference]: Finished difference Result 20068 states and 51285 transitions. [2021-02-19 17:20:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 53 [2021-02-19 17:20:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:14,088 INFO L225 Difference]: With dead ends: 20068 [2021-02-19 17:20:14,089 INFO L226 Difference]: Without dead ends: 20033 [2021-02-19 17:20:14,089 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20033 states. [2021-02-19 17:20:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20033 to 18594. [2021-02-19 17:20:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18594 states, 18593 states have (on average 2.5987199483676653) internal successors, (48318), 18593 states have internal predecessors, (48318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18594 states to 18594 states and 48318 transitions. [2021-02-19 17:20:14,409 INFO L78 Accepts]: Start accepts. Automaton has 18594 states and 48318 transitions. Word has length 53 [2021-02-19 17:20:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:14,409 INFO L480 AbstractCegarLoop]: Abstraction has 18594 states and 48318 transitions. [2021-02-19 17:20:14,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:20:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 18594 states and 48318 transitions. [2021-02-19 17:20:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:14,420 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:14,420 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:14,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:14,620 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1728287220, now seen corresponding path program 172 times [2021-02-19 17:20:14,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:14,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960563270] [2021-02-19 17:20:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:14,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960563270] [2021-02-19 17:20:14,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226038293] [2021-02-19 17:20:14,685 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:14,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:14,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:14,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:20:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074696366] [2021-02-19 17:20:14,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:20:14,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:20:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:20:14,811 INFO L87 Difference]: Start difference. First operand 18594 states and 48318 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:20:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:15,046 INFO L93 Difference]: Finished difference Result 21173 states and 53581 transitions. [2021-02-19 17:20:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:20:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 53 [2021-02-19 17:20:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:15,079 INFO L225 Difference]: With dead ends: 21173 [2021-02-19 17:20:15,079 INFO L226 Difference]: Without dead ends: 21164 [2021-02-19 17:20:15,080 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21164 states. [2021-02-19 17:20:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21164 to 18576. [2021-02-19 17:20:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18576 states, 18575 states have (on average 2.5972543741588154) internal successors, (48244), 18575 states have internal predecessors, (48244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18576 states to 18576 states and 48244 transitions. [2021-02-19 17:20:15,402 INFO L78 Accepts]: Start accepts. Automaton has 18576 states and 48244 transitions. Word has length 53 [2021-02-19 17:20:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:15,403 INFO L480 AbstractCegarLoop]: Abstraction has 18576 states and 48244 transitions. [2021-02-19 17:20:15,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:20:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 18576 states and 48244 transitions. [2021-02-19 17:20:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:15,415 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:15,415 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:15,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-02-19 17:20:15,616 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:15,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1521224654, now seen corresponding path program 173 times [2021-02-19 17:20:15,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:15,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896972972] [2021-02-19 17:20:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:15,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896972972] [2021-02-19 17:20:15,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295578589] [2021-02-19 17:20:15,691 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:15,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:20:15,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:15,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:15,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:15,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 14 [2021-02-19 17:20:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743101971] [2021-02-19 17:20:15,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:20:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:15,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:20:15,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:20:15,848 INFO L87 Difference]: Start difference. First operand 18576 states and 48244 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:16,183 INFO L93 Difference]: Finished difference Result 21383 states and 53981 transitions. [2021-02-19 17:20:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:20:16,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:16,213 INFO L225 Difference]: With dead ends: 21383 [2021-02-19 17:20:16,214 INFO L226 Difference]: Without dead ends: 21365 [2021-02-19 17:20:16,214 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:20:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21365 states. [2021-02-19 17:20:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21365 to 18576. [2021-02-19 17:20:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18576 states, 18575 states have (on average 2.5959623149394346) internal successors, (48220), 18575 states have internal predecessors, (48220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18576 states to 18576 states and 48220 transitions. [2021-02-19 17:20:16,537 INFO L78 Accepts]: Start accepts. Automaton has 18576 states and 48220 transitions. Word has length 53 [2021-02-19 17:20:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:16,537 INFO L480 AbstractCegarLoop]: Abstraction has 18576 states and 48220 transitions. [2021-02-19 17:20:16,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18576 states and 48220 transitions. [2021-02-19 17:20:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:16,550 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:16,550 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:16,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:16,750 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:16,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1325742629, now seen corresponding path program 174 times [2021-02-19 17:20:16,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:16,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113190682] [2021-02-19 17:20:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113190682] [2021-02-19 17:20:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698475521] [2021-02-19 17:20:16,850 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:16,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-02-19 17:20:16,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:16,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:16,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:16,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:16,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:20:16,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73732444] [2021-02-19 17:20:16,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:16,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:16,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:16,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:16,999 INFO L87 Difference]: Start difference. First operand 18576 states and 48220 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:20:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:17,815 INFO L93 Difference]: Finished difference Result 19388 states and 49713 transitions. [2021-02-19 17:20:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 53 [2021-02-19 17:20:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:17,845 INFO L225 Difference]: With dead ends: 19388 [2021-02-19 17:20:17,845 INFO L226 Difference]: Without dead ends: 19312 [2021-02-19 17:20:17,845 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19312 states. [2021-02-19 17:20:18,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19312 to 18549. [2021-02-19 17:20:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18549 states, 18548 states have (on average 2.593487168427863) internal successors, (48104), 18548 states have internal predecessors, (48104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18549 states to 18549 states and 48104 transitions. [2021-02-19 17:20:18,167 INFO L78 Accepts]: Start accepts. Automaton has 18549 states and 48104 transitions. Word has length 53 [2021-02-19 17:20:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:18,167 INFO L480 AbstractCegarLoop]: Abstraction has 18549 states and 48104 transitions. [2021-02-19 17:20:18,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:20:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 18549 states and 48104 transitions. [2021-02-19 17:20:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:18,177 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:18,177 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:18,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-02-19 17:20:18,378 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash 712206449, now seen corresponding path program 175 times [2021-02-19 17:20:18,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:18,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339841556] [2021-02-19 17:20:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:18,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339841556] [2021-02-19 17:20:18,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550238723] [2021-02-19 17:20:18,479 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:18,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:18,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:18,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:20:18,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227475169] [2021-02-19 17:20:18,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:18,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:18,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:18,609 INFO L87 Difference]: Start difference. First operand 18549 states and 48104 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:20:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:19,170 INFO L93 Difference]: Finished difference Result 19838 states and 50709 transitions. [2021-02-19 17:20:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 53 [2021-02-19 17:20:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:19,197 INFO L225 Difference]: With dead ends: 19838 [2021-02-19 17:20:19,197 INFO L226 Difference]: Without dead ends: 19793 [2021-02-19 17:20:19,197 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19793 states. [2021-02-19 17:20:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19793 to 18538. [2021-02-19 17:20:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18538 states, 18537 states have (on average 2.5935156713599827) internal successors, (48076), 18537 states have internal predecessors, (48076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18538 states to 18538 states and 48076 transitions. [2021-02-19 17:20:19,491 INFO L78 Accepts]: Start accepts. Automaton has 18538 states and 48076 transitions. Word has length 53 [2021-02-19 17:20:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:19,492 INFO L480 AbstractCegarLoop]: Abstraction has 18538 states and 48076 transitions. [2021-02-19 17:20:19,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:20:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 18538 states and 48076 transitions. [2021-02-19 17:20:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:19,503 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:19,503 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:19,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:19,703 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1440843513, now seen corresponding path program 176 times [2021-02-19 17:20:19,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:19,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053320651] [2021-02-19 17:20:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:19,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053320651] [2021-02-19 17:20:19,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94233795] [2021-02-19 17:20:19,807 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:19,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:19,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:19,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:19,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:19,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:19,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:20:19,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136381590] [2021-02-19 17:20:19,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:19,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:19,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:19,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:19,938 INFO L87 Difference]: Start difference. First operand 18538 states and 48076 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-02-19 17:20:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:20,701 INFO L93 Difference]: Finished difference Result 21341 states and 54040 transitions. [2021-02-19 17:20:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:20:20,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 53 [2021-02-19 17:20:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:20,730 INFO L225 Difference]: With dead ends: 21341 [2021-02-19 17:20:20,730 INFO L226 Difference]: Without dead ends: 21287 [2021-02-19 17:20:20,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:20:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21287 states. [2021-02-19 17:20:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21287 to 18695. [2021-02-19 17:20:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18695 states, 18694 states have (on average 2.594201348026105) internal successors, (48496), 18694 states have internal predecessors, (48496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18695 states to 18695 states and 48496 transitions. [2021-02-19 17:20:21,033 INFO L78 Accepts]: Start accepts. Automaton has 18695 states and 48496 transitions. Word has length 53 [2021-02-19 17:20:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:21,033 INFO L480 AbstractCegarLoop]: Abstraction has 18695 states and 48496 transitions. [2021-02-19 17:20:21,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-02-19 17:20:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 18695 states and 48496 transitions. [2021-02-19 17:20:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:21,045 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:21,045 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:21,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable637 [2021-02-19 17:20:21,246 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 91715596, now seen corresponding path program 177 times [2021-02-19 17:20:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:21,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111399929] [2021-02-19 17:20:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:21,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111399929] [2021-02-19 17:20:21,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744555720] [2021-02-19 17:20:21,410 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:21,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:20:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:21,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:21,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:21,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:20:21,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962421949] [2021-02-19 17:20:21,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:21,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:21,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:21,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:21,552 INFO L87 Difference]: Start difference. First operand 18695 states and 48496 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:20:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:21,882 INFO L93 Difference]: Finished difference Result 21411 states and 54036 transitions. [2021-02-19 17:20:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:20:21,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 53 [2021-02-19 17:20:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:21,910 INFO L225 Difference]: With dead ends: 21411 [2021-02-19 17:20:21,911 INFO L226 Difference]: Without dead ends: 21387 [2021-02-19 17:20:21,911 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:20:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21387 states. [2021-02-19 17:20:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21387 to 18695. [2021-02-19 17:20:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18695 states, 18694 states have (on average 2.5932919653364714) internal successors, (48479), 18694 states have internal predecessors, (48479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18695 states to 18695 states and 48479 transitions. [2021-02-19 17:20:22,258 INFO L78 Accepts]: Start accepts. Automaton has 18695 states and 48479 transitions. Word has length 53 [2021-02-19 17:20:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:22,258 INFO L480 AbstractCegarLoop]: Abstraction has 18695 states and 48479 transitions. [2021-02-19 17:20:22,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:20:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 18695 states and 48479 transitions. [2021-02-19 17:20:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:22,269 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:22,269 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:22,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:22,469 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:22,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:22,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1286006979, now seen corresponding path program 178 times [2021-02-19 17:20:22,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:22,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860431668] [2021-02-19 17:20:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:22,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860431668] [2021-02-19 17:20:22,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041676538] [2021-02-19 17:20:22,578 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:22,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:22,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:22,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:22,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:22,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:20:22,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337261362] [2021-02-19 17:20:22,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:20:22,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:20:22,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:22,710 INFO L87 Difference]: Start difference. First operand 18695 states and 48479 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) [2021-02-19 17:20:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:23,757 INFO L93 Difference]: Finished difference Result 23725 states and 59400 transitions. [2021-02-19 17:20:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 17:20:23,758 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 53 [2021-02-19 17:20:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:23,786 INFO L225 Difference]: With dead ends: 23725 [2021-02-19 17:20:23,787 INFO L226 Difference]: Without dead ends: 23611 [2021-02-19 17:20:23,787 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:20:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23611 states. [2021-02-19 17:20:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23611 to 18825. [2021-02-19 17:20:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18825 states, 18824 states have (on average 2.594294517637059) internal successors, (48835), 18824 states have internal predecessors, (48835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18825 states to 18825 states and 48835 transitions. [2021-02-19 17:20:24,105 INFO L78 Accepts]: Start accepts. Automaton has 18825 states and 48835 transitions. Word has length 53 [2021-02-19 17:20:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:24,105 INFO L480 AbstractCegarLoop]: Abstraction has 18825 states and 48835 transitions. [2021-02-19 17:20:24,105 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) [2021-02-19 17:20:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 18825 states and 48835 transitions. [2021-02-19 17:20:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:24,117 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:24,117 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:24,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-02-19 17:20:24,318 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:24,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:24,318 INFO L82 PathProgramCache]: Analyzing trace with hash -899404302, now seen corresponding path program 179 times [2021-02-19 17:20:24,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:24,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291184940] [2021-02-19 17:20:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:24,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291184940] [2021-02-19 17:20:24,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239722500] [2021-02-19 17:20:24,425 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:24,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:20:24,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:24,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:24,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:24,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:24,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 16 [2021-02-19 17:20:24,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899538714] [2021-02-19 17:20:24,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:20:24,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:20:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:24,590 INFO L87 Difference]: Start difference. First operand 18825 states and 48835 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 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) [2021-02-19 17:20:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:24,989 INFO L93 Difference]: Finished difference Result 21758 states and 54832 transitions. [2021-02-19 17:20:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:20:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 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 53 [2021-02-19 17:20:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:25,024 INFO L225 Difference]: With dead ends: 21758 [2021-02-19 17:20:25,025 INFO L226 Difference]: Without dead ends: 21725 [2021-02-19 17:20:25,025 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:20:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21725 states. [2021-02-19 17:20:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21725 to 18825. [2021-02-19 17:20:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18825 states, 18824 states have (on average 2.593816404589885) internal successors, (48826), 18824 states have internal predecessors, (48826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18825 states to 18825 states and 48826 transitions. [2021-02-19 17:20:25,389 INFO L78 Accepts]: Start accepts. Automaton has 18825 states and 48826 transitions. Word has length 53 [2021-02-19 17:20:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:25,389 INFO L480 AbstractCegarLoop]: Abstraction has 18825 states and 48826 transitions. [2021-02-19 17:20:25,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 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) [2021-02-19 17:20:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 18825 states and 48826 transitions. [2021-02-19 17:20:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:25,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:25,403 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:25,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-02-19 17:20:25,604 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:25,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1345698489, now seen corresponding path program 180 times [2021-02-19 17:20:25,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:25,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737928144] [2021-02-19 17:20:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:25,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737928144] [2021-02-19 17:20:25,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777500215] [2021-02-19 17:20:25,734 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:25,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-02-19 17:20:25,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:25,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:25,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:25,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:20:25,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692441607] [2021-02-19 17:20:25,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:20:25,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:25,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:20:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:25,869 INFO L87 Difference]: Start difference. First operand 18825 states and 48826 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) [2021-02-19 17:20:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:26,661 INFO L93 Difference]: Finished difference Result 22765 states and 57071 transitions. [2021-02-19 17:20:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:20:26,662 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 53 [2021-02-19 17:20:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:26,692 INFO L225 Difference]: With dead ends: 22765 [2021-02-19 17:20:26,692 INFO L226 Difference]: Without dead ends: 22609 [2021-02-19 17:20:26,692 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:20:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22609 states. [2021-02-19 17:20:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22609 to 18519. [2021-02-19 17:20:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18519 states, 18518 states have (on average 2.588940490333729) internal successors, (47942), 18518 states have internal predecessors, (47942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18519 states to 18519 states and 47942 transitions. [2021-02-19 17:20:27,030 INFO L78 Accepts]: Start accepts. Automaton has 18519 states and 47942 transitions. Word has length 53 [2021-02-19 17:20:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:27,030 INFO L480 AbstractCegarLoop]: Abstraction has 18519 states and 47942 transitions. [2021-02-19 17:20:27,030 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) [2021-02-19 17:20:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 18519 states and 47942 transitions. [2021-02-19 17:20:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:27,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:27,041 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:27,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:27,242 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:27,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1583760006, now seen corresponding path program 98 times [2021-02-19 17:20:27,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:27,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395443695] [2021-02-19 17:20:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:27,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395443695] [2021-02-19 17:20:27,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246294022] [2021-02-19 17:20:27,332 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:27,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:27,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:27,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:27,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:27,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:27,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:20:27,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978114685] [2021-02-19 17:20:27,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:27,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:27,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:27,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:27,466 INFO L87 Difference]: Start difference. First operand 18519 states and 47942 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:20:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:27,748 INFO L93 Difference]: Finished difference Result 21678 states and 54462 transitions. [2021-02-19 17:20:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:20:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 53 [2021-02-19 17:20:27,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:27,778 INFO L225 Difference]: With dead ends: 21678 [2021-02-19 17:20:27,779 INFO L226 Difference]: Without dead ends: 21664 [2021-02-19 17:20:27,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21664 states. [2021-02-19 17:20:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21664 to 18888. [2021-02-19 17:20:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18888 states, 18887 states have (on average 2.5939005665272408) internal successors, (48991), 18887 states have internal predecessors, (48991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18888 states to 18888 states and 48991 transitions. [2021-02-19 17:20:28,113 INFO L78 Accepts]: Start accepts. Automaton has 18888 states and 48991 transitions. Word has length 53 [2021-02-19 17:20:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:28,114 INFO L480 AbstractCegarLoop]: Abstraction has 18888 states and 48991 transitions. [2021-02-19 17:20:28,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:20:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18888 states and 48991 transitions. [2021-02-19 17:20:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:28,125 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:28,125 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:28,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-02-19 17:20:28,326 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:28,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:28,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2089326880, now seen corresponding path program 99 times [2021-02-19 17:20:28,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:28,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622924743] [2021-02-19 17:20:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:28,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622924743] [2021-02-19 17:20:28,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075541715] [2021-02-19 17:20:28,416 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:28,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-02-19 17:20:28,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:20:28,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 109 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:28,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:28,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-02-19 17:20:28,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098134746] [2021-02-19 17:20:28,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:20:28,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:20:28,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:28,573 INFO L87 Difference]: Start difference. First operand 18888 states and 48991 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:20:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:29,010 INFO L93 Difference]: Finished difference Result 22429 states and 56253 transitions. [2021-02-19 17:20:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 53 [2021-02-19 17:20:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:29,038 INFO L225 Difference]: With dead ends: 22429 [2021-02-19 17:20:29,038 INFO L226 Difference]: Without dead ends: 22429 [2021-02-19 17:20:29,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:20:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22429 states. [2021-02-19 17:20:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22429 to 18495. [2021-02-19 17:20:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18495 states, 18494 states have (on average 2.589650697523521) internal successors, (47893), 18494 states have internal predecessors, (47893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18495 states to 18495 states and 47893 transitions. [2021-02-19 17:20:29,349 INFO L78 Accepts]: Start accepts. Automaton has 18495 states and 47893 transitions. Word has length 53 [2021-02-19 17:20:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:29,349 INFO L480 AbstractCegarLoop]: Abstraction has 18495 states and 47893 transitions. [2021-02-19 17:20:29,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:20:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 18495 states and 47893 transitions. [2021-02-19 17:20:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:29,360 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:29,360 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:29,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-02-19 17:20:29,560 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash 547874380, now seen corresponding path program 181 times [2021-02-19 17:20:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:29,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555003328] [2021-02-19 17:20:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555003328] [2021-02-19 17:20:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796897847] [2021-02-19 17:20:29,683 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:29,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:29,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:29,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:29,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:20:29,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875928390] [2021-02-19 17:20:29,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:20:29,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:20:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:29,819 INFO L87 Difference]: Start difference. First operand 18495 states and 47893 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:30,188 INFO L93 Difference]: Finished difference Result 20941 states and 52943 transitions. [2021-02-19 17:20:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:20:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:30,220 INFO L225 Difference]: With dead ends: 20941 [2021-02-19 17:20:30,220 INFO L226 Difference]: Without dead ends: 20905 [2021-02-19 17:20:30,220 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:20:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2021-02-19 17:20:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 18495. [2021-02-19 17:20:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18495 states, 18494 states have (on average 2.5891640532064453) internal successors, (47884), 18494 states have internal predecessors, (47884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18495 states to 18495 states and 47884 transitions. [2021-02-19 17:20:30,577 INFO L78 Accepts]: Start accepts. Automaton has 18495 states and 47884 transitions. Word has length 53 [2021-02-19 17:20:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:30,577 INFO L480 AbstractCegarLoop]: Abstraction has 18495 states and 47884 transitions. [2021-02-19 17:20:30,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 18495 states and 47884 transitions. [2021-02-19 17:20:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:30,588 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:30,588 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:30,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-02-19 17:20:30,789 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash 355684489, now seen corresponding path program 100 times [2021-02-19 17:20:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:30,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405520915] [2021-02-19 17:20:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:30,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405520915] [2021-02-19 17:20:30,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682487435] [2021-02-19 17:20:30,899 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:30,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:31,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:31,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:20:31,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842589685] [2021-02-19 17:20:31,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:31,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:31,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:31,031 INFO L87 Difference]: Start difference. First operand 18495 states and 47884 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:20:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:31,606 INFO L93 Difference]: Finished difference Result 20077 states and 51155 transitions. [2021-02-19 17:20:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 53 [2021-02-19 17:20:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:31,632 INFO L225 Difference]: With dead ends: 20077 [2021-02-19 17:20:31,632 INFO L226 Difference]: Without dead ends: 20052 [2021-02-19 17:20:31,632 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20052 states. [2021-02-19 17:20:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20052 to 18718. [2021-02-19 17:20:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18718 states, 18717 states have (on average 2.5876475930971843) internal successors, (48433), 18717 states have internal predecessors, (48433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18718 states to 18718 states and 48433 transitions. [2021-02-19 17:20:31,939 INFO L78 Accepts]: Start accepts. Automaton has 18718 states and 48433 transitions. Word has length 53 [2021-02-19 17:20:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:31,939 INFO L480 AbstractCegarLoop]: Abstraction has 18718 states and 48433 transitions. [2021-02-19 17:20:31,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:20:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 18718 states and 48433 transitions. [2021-02-19 17:20:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:31,952 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:31,952 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:32,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:32,152 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1198012368, now seen corresponding path program 182 times [2021-02-19 17:20:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:32,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522372343] [2021-02-19 17:20:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:32,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522372343] [2021-02-19 17:20:32,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715482976] [2021-02-19 17:20:32,225 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:32,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:32,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:32,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:32,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:32,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:32,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:20:32,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255896491] [2021-02-19 17:20:32,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:20:32,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:32,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:20:32,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:20:32,368 INFO L87 Difference]: Start difference. First operand 18718 states and 48433 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:20:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:32,598 INFO L93 Difference]: Finished difference Result 21478 states and 54134 transitions. [2021-02-19 17:20:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:20:32,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 53 [2021-02-19 17:20:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:32,628 INFO L225 Difference]: With dead ends: 21478 [2021-02-19 17:20:32,628 INFO L226 Difference]: Without dead ends: 21475 [2021-02-19 17:20:32,628 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21475 states. [2021-02-19 17:20:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21475 to 18710. [2021-02-19 17:20:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18710 states, 18709 states have (on average 2.5868298679779786) internal successors, (48397), 18709 states have internal predecessors, (48397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18710 states to 18710 states and 48397 transitions. [2021-02-19 17:20:32,913 INFO L78 Accepts]: Start accepts. Automaton has 18710 states and 48397 transitions. Word has length 53 [2021-02-19 17:20:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:32,913 INFO L480 AbstractCegarLoop]: Abstraction has 18710 states and 48397 transitions. [2021-02-19 17:20:32,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-02-19 17:20:32,913 INFO L276 IsEmpty]: Start isEmpty. Operand 18710 states and 48397 transitions. [2021-02-19 17:20:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:32,924 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:32,924 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:33,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:33,124 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -990949802, now seen corresponding path program 183 times [2021-02-19 17:20:33,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:33,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738011155] [2021-02-19 17:20:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:33,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738011155] [2021-02-19 17:20:33,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123204555] [2021-02-19 17:20:33,203 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:33,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 17:20:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:33,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:33,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:20:33,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839287234] [2021-02-19 17:20:33,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:33,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:33,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:33,342 INFO L87 Difference]: Start difference. First operand 18710 states and 48397 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:33,605 INFO L93 Difference]: Finished difference Result 21506 states and 54147 transitions. [2021-02-19 17:20:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:20:33,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:33,632 INFO L225 Difference]: With dead ends: 21506 [2021-02-19 17:20:33,632 INFO L226 Difference]: Without dead ends: 21488 [2021-02-19 17:20:33,632 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21488 states. [2021-02-19 17:20:33,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21488 to 18710. [2021-02-19 17:20:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18710 states, 18709 states have (on average 2.5855470629108983) internal successors, (48373), 18709 states have internal predecessors, (48373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18710 states to 18710 states and 48373 transitions. [2021-02-19 17:20:33,909 INFO L78 Accepts]: Start accepts. Automaton has 18710 states and 48373 transitions. Word has length 53 [2021-02-19 17:20:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:33,909 INFO L480 AbstractCegarLoop]: Abstraction has 18710 states and 48373 transitions. [2021-02-19 17:20:33,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 18710 states and 48373 transitions. [2021-02-19 17:20:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:33,920 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:33,920 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:34,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-02-19 17:20:34,120 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1856017481, now seen corresponding path program 184 times [2021-02-19 17:20:34,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:34,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982060871] [2021-02-19 17:20:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:34,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982060871] [2021-02-19 17:20:34,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864272301] [2021-02-19 17:20:34,292 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:34,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:34,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:34,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:34,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:34,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:20:34,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847540941] [2021-02-19 17:20:34,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:34,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:34,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:34,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:34,447 INFO L87 Difference]: Start difference. First operand 18710 states and 48373 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:20:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:35,279 INFO L93 Difference]: Finished difference Result 19552 states and 49924 transitions. [2021-02-19 17:20:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:35,280 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 53 [2021-02-19 17:20:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:35,306 INFO L225 Difference]: With dead ends: 19552 [2021-02-19 17:20:35,307 INFO L226 Difference]: Without dead ends: 19458 [2021-02-19 17:20:35,307 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19458 states. [2021-02-19 17:20:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19458 to 18698. [2021-02-19 17:20:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18698 states, 18697 states have (on average 2.581858052093919) internal successors, (48273), 18697 states have internal predecessors, (48273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18698 states to 18698 states and 48273 transitions. [2021-02-19 17:20:35,601 INFO L78 Accepts]: Start accepts. Automaton has 18698 states and 48273 transitions. Word has length 53 [2021-02-19 17:20:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:35,601 INFO L480 AbstractCegarLoop]: Abstraction has 18698 states and 48273 transitions. [2021-02-19 17:20:35,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:20:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 18698 states and 48273 transitions. [2021-02-19 17:20:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:35,612 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:35,612 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:35,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:35,813 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1242481301, now seen corresponding path program 185 times [2021-02-19 17:20:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:35,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549107249] [2021-02-19 17:20:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:35,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549107249] [2021-02-19 17:20:35,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564597640] [2021-02-19 17:20:35,928 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:35,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-02-19 17:20:35,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:35,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:35,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:36,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:36,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:20:36,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891662952] [2021-02-19 17:20:36,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:36,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:36,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:36,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:36,064 INFO L87 Difference]: Start difference. First operand 18698 states and 48273 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:20:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:36,639 INFO L93 Difference]: Finished difference Result 20069 states and 51059 transitions. [2021-02-19 17:20:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:36,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 53 [2021-02-19 17:20:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:36,664 INFO L225 Difference]: With dead ends: 20069 [2021-02-19 17:20:36,664 INFO L226 Difference]: Without dead ends: 20015 [2021-02-19 17:20:36,664 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20015 states. [2021-02-19 17:20:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20015 to 18744. [2021-02-19 17:20:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18744 states, 18743 states have (on average 2.581763858507176) internal successors, (48390), 18743 states have internal predecessors, (48390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18744 states to 18744 states and 48390 transitions. [2021-02-19 17:20:36,960 INFO L78 Accepts]: Start accepts. Automaton has 18744 states and 48390 transitions. Word has length 53 [2021-02-19 17:20:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:36,960 INFO L480 AbstractCegarLoop]: Abstraction has 18744 states and 48390 transitions. [2021-02-19 17:20:36,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:20:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 18744 states and 48390 transitions. [2021-02-19 17:20:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:36,972 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:36,972 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:37,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-02-19 17:20:37,173 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:37,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:37,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1085181814, now seen corresponding path program 101 times [2021-02-19 17:20:37,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:37,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838627111] [2021-02-19 17:20:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:37,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838627111] [2021-02-19 17:20:37,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123931123] [2021-02-19 17:20:37,249 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:37,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-02-19 17:20:37,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:37,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:37,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:37,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-02-19 17:20:37,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524510097] [2021-02-19 17:20:37,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:20:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:37,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:20:37,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:37,407 INFO L87 Difference]: Start difference. First operand 18744 states and 48390 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:37,701 INFO L93 Difference]: Finished difference Result 21514 states and 54054 transitions. [2021-02-19 17:20:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:20:37,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:37,728 INFO L225 Difference]: With dead ends: 21514 [2021-02-19 17:20:37,728 INFO L226 Difference]: Without dead ends: 21494 [2021-02-19 17:20:37,728 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21494 states. [2021-02-19 17:20:37,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21494 to 19105. [2021-02-19 17:20:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19105 states, 19104 states have (on average 2.583856783919598) internal successors, (49362), 19104 states have internal predecessors, (49362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19105 states to 19105 states and 49362 transitions. [2021-02-19 17:20:38,034 INFO L78 Accepts]: Start accepts. Automaton has 19105 states and 49362 transitions. Word has length 53 [2021-02-19 17:20:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:38,034 INFO L480 AbstractCegarLoop]: Abstraction has 19105 states and 49362 transitions. [2021-02-19 17:20:38,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 19105 states and 49362 transitions. [2021-02-19 17:20:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:38,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:38,124 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:38,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable668 [2021-02-19 17:20:38,325 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:38,325 INFO L82 PathProgramCache]: Analyzing trace with hash -910568661, now seen corresponding path program 186 times [2021-02-19 17:20:38,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:38,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676454944] [2021-02-19 17:20:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:38,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676454944] [2021-02-19 17:20:38,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914248294] [2021-02-19 17:20:38,426 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:38,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-02-19 17:20:38,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:38,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:38,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:38,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:38,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:20:38,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367256962] [2021-02-19 17:20:38,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:38,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:38,562 INFO L87 Difference]: Start difference. First operand 19105 states and 49362 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-02-19 17:20:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:39,397 INFO L93 Difference]: Finished difference Result 22055 states and 55667 transitions. [2021-02-19 17:20:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:20:39,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 53 [2021-02-19 17:20:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:39,424 INFO L225 Difference]: With dead ends: 22055 [2021-02-19 17:20:39,424 INFO L226 Difference]: Without dead ends: 22001 [2021-02-19 17:20:39,424 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:20:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22001 states. [2021-02-19 17:20:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22001 to 19382. [2021-02-19 17:20:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19382 states, 19381 states have (on average 2.585676693669057) internal successors, (50113), 19381 states have internal predecessors, (50113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19382 states to 19382 states and 50113 transitions. [2021-02-19 17:20:39,730 INFO L78 Accepts]: Start accepts. Automaton has 19382 states and 50113 transitions. Word has length 53 [2021-02-19 17:20:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:39,730 INFO L480 AbstractCegarLoop]: Abstraction has 19382 states and 50113 transitions. [2021-02-19 17:20:39,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-02-19 17:20:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 19382 states and 50113 transitions. [2021-02-19 17:20:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:39,741 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:39,741 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:39,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable671 [2021-02-19 17:20:39,942 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:39,942 INFO L82 PathProgramCache]: Analyzing trace with hash 621990448, now seen corresponding path program 187 times [2021-02-19 17:20:39,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:39,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403408242] [2021-02-19 17:20:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:40,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403408242] [2021-02-19 17:20:40,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235209439] [2021-02-19 17:20:40,027 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:40,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:40,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:40,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:20:40,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986613819] [2021-02-19 17:20:40,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:40,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:40,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:40,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:40,157 INFO L87 Difference]: Start difference. First operand 19382 states and 50113 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:20:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:40,450 INFO L93 Difference]: Finished difference Result 22274 states and 56066 transitions. [2021-02-19 17:20:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:20:40,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 53 [2021-02-19 17:20:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:40,480 INFO L225 Difference]: With dead ends: 22274 [2021-02-19 17:20:40,480 INFO L226 Difference]: Without dead ends: 22250 [2021-02-19 17:20:40,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:20:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22250 states. [2021-02-19 17:20:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 19382. [2021-02-19 17:20:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19382 states, 19381 states have (on average 2.5847995459470616) internal successors, (50096), 19381 states have internal predecessors, (50096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19382 states to 19382 states and 50096 transitions. [2021-02-19 17:20:40,813 INFO L78 Accepts]: Start accepts. Automaton has 19382 states and 50096 transitions. Word has length 53 [2021-02-19 17:20:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:40,813 INFO L480 AbstractCegarLoop]: Abstraction has 19382 states and 50096 transitions. [2021-02-19 17:20:40,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:20:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 19382 states and 50096 transitions. [2021-02-19 17:20:40,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:40,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:40,825 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:41,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:41,026 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash -755732127, now seen corresponding path program 188 times [2021-02-19 17:20:41,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:41,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43313501] [2021-02-19 17:20:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:41,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43313501] [2021-02-19 17:20:41,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019542939] [2021-02-19 17:20:41,144 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:41,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:41,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:41,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:41,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:20:41,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829002734] [2021-02-19 17:20:41,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:20:41,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:41,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:20:41,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:41,282 INFO L87 Difference]: Start difference. First operand 19382 states and 50096 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) [2021-02-19 17:20:42,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:42,416 INFO L93 Difference]: Finished difference Result 25825 states and 64169 transitions. [2021-02-19 17:20:42,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 17:20:42,417 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 53 [2021-02-19 17:20:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:42,450 INFO L225 Difference]: With dead ends: 25825 [2021-02-19 17:20:42,451 INFO L226 Difference]: Without dead ends: 25645 [2021-02-19 17:20:42,451 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:20:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25645 states. [2021-02-19 17:20:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25645 to 19870. [2021-02-19 17:20:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19870 states, 19869 states have (on average 2.5872464643414363) internal successors, (51406), 19869 states have internal predecessors, (51406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19870 states to 19870 states and 51406 transitions. [2021-02-19 17:20:42,838 INFO L78 Accepts]: Start accepts. Automaton has 19870 states and 51406 transitions. Word has length 53 [2021-02-19 17:20:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:42,838 INFO L480 AbstractCegarLoop]: Abstraction has 19870 states and 51406 transitions. [2021-02-19 17:20:42,838 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) [2021-02-19 17:20:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 19870 states and 51406 transitions. [2021-02-19 17:20:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:42,850 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:42,850 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:43,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-02-19 17:20:43,050 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:43,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash -369129450, now seen corresponding path program 189 times [2021-02-19 17:20:43,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:43,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550054868] [2021-02-19 17:20:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:43,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550054868] [2021-02-19 17:20:43,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677459829] [2021-02-19 17:20:43,155 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:43,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:20:43,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:43,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:43,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:43,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:20:43,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608987260] [2021-02-19 17:20:43,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:20:43,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:43,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:20:43,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:43,294 INFO L87 Difference]: Start difference. First operand 19870 states and 51406 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) [2021-02-19 17:20:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:43,610 INFO L93 Difference]: Finished difference Result 22895 states and 57607 transitions. [2021-02-19 17:20:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:20:43,611 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 53 [2021-02-19 17:20:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:43,640 INFO L225 Difference]: With dead ends: 22895 [2021-02-19 17:20:43,640 INFO L226 Difference]: Without dead ends: 22862 [2021-02-19 17:20:43,640 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22862 states. [2021-02-19 17:20:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22862 to 19870. [2021-02-19 17:20:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19870 states, 19869 states have (on average 2.5867934974080224) internal successors, (51397), 19869 states have internal predecessors, (51397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19870 states to 19870 states and 51397 transitions. [2021-02-19 17:20:43,966 INFO L78 Accepts]: Start accepts. Automaton has 19870 states and 51397 transitions. Word has length 53 [2021-02-19 17:20:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:43,966 INFO L480 AbstractCegarLoop]: Abstraction has 19870 states and 51397 transitions. [2021-02-19 17:20:43,966 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) [2021-02-19 17:20:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19870 states and 51397 transitions. [2021-02-19 17:20:43,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:43,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:43,977 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:44,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:44,178 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash -815423637, now seen corresponding path program 190 times [2021-02-19 17:20:44,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:44,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924271949] [2021-02-19 17:20:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:44,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924271949] [2021-02-19 17:20:44,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349808780] [2021-02-19 17:20:44,305 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:44,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:44,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:44,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:44,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:44,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:20:44,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011223137] [2021-02-19 17:20:44,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:20:44,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:44,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:20:44,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:44,438 INFO L87 Difference]: Start difference. First operand 19870 states and 51397 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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) [2021-02-19 17:20:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:46,061 INFO L93 Difference]: Finished difference Result 30121 states and 74105 transitions. [2021-02-19 17:20:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 17:20:46,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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 53 [2021-02-19 17:20:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:46,106 INFO L225 Difference]: With dead ends: 30121 [2021-02-19 17:20:46,107 INFO L226 Difference]: Without dead ends: 29845 [2021-02-19 17:20:46,107 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 17:20:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29845 states. [2021-02-19 17:20:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29845 to 20316. [2021-02-19 17:20:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20316 states, 20315 states have (on average 2.589367462466158) internal successors, (52603), 20315 states have internal predecessors, (52603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20316 states to 20316 states and 52603 transitions. [2021-02-19 17:20:46,501 INFO L78 Accepts]: Start accepts. Automaton has 20316 states and 52603 transitions. Word has length 53 [2021-02-19 17:20:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:46,501 INFO L480 AbstractCegarLoop]: Abstraction has 20316 states and 52603 transitions. [2021-02-19 17:20:46,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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) [2021-02-19 17:20:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 20316 states and 52603 transitions. [2021-02-19 17:20:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:46,514 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:46,514 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:46,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:46,714 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1078149232, now seen corresponding path program 191 times [2021-02-19 17:20:46,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:46,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438073638] [2021-02-19 17:20:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:46,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438073638] [2021-02-19 17:20:46,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629303241] [2021-02-19 17:20:46,912 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:46,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:20:46,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:46,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:46,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:47,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:47,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-02-19 17:20:47,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276488966] [2021-02-19 17:20:47,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:20:47,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:47,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:20:47,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:47,072 INFO L87 Difference]: Start difference. First operand 20316 states and 52603 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:47,461 INFO L93 Difference]: Finished difference Result 23542 states and 59224 transitions. [2021-02-19 17:20:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:47,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:47,491 INFO L225 Difference]: With dead ends: 23542 [2021-02-19 17:20:47,491 INFO L226 Difference]: Without dead ends: 23500 [2021-02-19 17:20:47,491 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:20:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23500 states. [2021-02-19 17:20:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23500 to 19982. [2021-02-19 17:20:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19982 states, 19981 states have (on average 2.5859566588258844) internal successors, (51670), 19981 states have internal predecessors, (51670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19982 states to 19982 states and 51670 transitions. [2021-02-19 17:20:47,822 INFO L78 Accepts]: Start accepts. Automaton has 19982 states and 51670 transitions. Word has length 53 [2021-02-19 17:20:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:47,822 INFO L480 AbstractCegarLoop]: Abstraction has 19982 states and 51670 transitions. [2021-02-19 17:20:47,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 19982 states and 51670 transitions. [2021-02-19 17:20:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:47,833 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:47,833 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:48,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-02-19 17:20:48,034 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:48,034 INFO L82 PathProgramCache]: Analyzing trace with hash -968737503, now seen corresponding path program 192 times [2021-02-19 17:20:48,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:48,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176951410] [2021-02-19 17:20:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:48,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176951410] [2021-02-19 17:20:48,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307923441] [2021-02-19 17:20:48,177 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:48,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-02-19 17:20:48,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:48,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:48,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:48,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:20:48,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583569811] [2021-02-19 17:20:48,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:20:48,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:20:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:20:48,315 INFO L87 Difference]: Start difference. First operand 19982 states and 51670 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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) [2021-02-19 17:20:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:49,250 INFO L93 Difference]: Finished difference Result 24985 states and 61884 transitions. [2021-02-19 17:20:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:20:49,251 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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 53 [2021-02-19 17:20:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:49,286 INFO L225 Difference]: With dead ends: 24985 [2021-02-19 17:20:49,286 INFO L226 Difference]: Without dead ends: 24607 [2021-02-19 17:20:49,286 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:20:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24607 states. [2021-02-19 17:20:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24607 to 18827. [2021-02-19 17:20:49,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18827 states, 18826 states have (on average 2.575215128014448) internal successors, (48481), 18826 states have internal predecessors, (48481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18827 states to 18827 states and 48481 transitions. [2021-02-19 17:20:49,603 INFO L78 Accepts]: Start accepts. Automaton has 18827 states and 48481 transitions. Word has length 53 [2021-02-19 17:20:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:49,603 INFO L480 AbstractCegarLoop]: Abstraction has 18827 states and 48481 transitions. [2021-02-19 17:20:49,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 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) [2021-02-19 17:20:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 18827 states and 48481 transitions. [2021-02-19 17:20:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:49,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:49,614 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:49,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-02-19 17:20:49,815 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:49,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1828679430, now seen corresponding path program 102 times [2021-02-19 17:20:49,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:49,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263695875] [2021-02-19 17:20:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:49,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263695875] [2021-02-19 17:20:49,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279874321] [2021-02-19 17:20:49,894 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:49,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-02-19 17:20:49,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:49,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:50,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:50,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:20:50,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582960034] [2021-02-19 17:20:50,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:20:50,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:50,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:20:50,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:20:50,049 INFO L87 Difference]: Start difference. First operand 18827 states and 48481 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:20:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:50,406 INFO L93 Difference]: Finished difference Result 25910 states and 64466 transitions. [2021-02-19 17:20:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:20:50,407 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 53 [2021-02-19 17:20:50,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:50,443 INFO L225 Difference]: With dead ends: 25910 [2021-02-19 17:20:50,443 INFO L226 Difference]: Without dead ends: 25910 [2021-02-19 17:20:50,444 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25910 states. [2021-02-19 17:20:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25910 to 19052. [2021-02-19 17:20:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 2.5807569156474726) internal successors, (49166), 19051 states have internal predecessors, (49166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 49166 transitions. [2021-02-19 17:20:50,831 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 49166 transitions. Word has length 53 [2021-02-19 17:20:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:50,831 INFO L480 AbstractCegarLoop]: Abstraction has 19052 states and 49166 transitions. [2021-02-19 17:20:50,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:20:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 49166 transitions. [2021-02-19 17:20:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:50,842 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:50,842 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:51,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:51,043 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:51,043 INFO L82 PathProgramCache]: Analyzing trace with hash 828715410, now seen corresponding path program 103 times [2021-02-19 17:20:51,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:51,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828826287] [2021-02-19 17:20:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:51,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828826287] [2021-02-19 17:20:51,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740306234] [2021-02-19 17:20:51,132 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:51,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:51,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:20:51,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133940419] [2021-02-19 17:20:51,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:20:51,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:51,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:20:51,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:51,277 INFO L87 Difference]: Start difference. First operand 19052 states and 49166 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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) [2021-02-19 17:20:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:51,722 INFO L93 Difference]: Finished difference Result 27902 states and 69255 transitions. [2021-02-19 17:20:51,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:20:51,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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 53 [2021-02-19 17:20:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:51,761 INFO L225 Difference]: With dead ends: 27902 [2021-02-19 17:20:51,762 INFO L226 Difference]: Without dead ends: 27902 [2021-02-19 17:20:51,762 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:20:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27902 states. [2021-02-19 17:20:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27902 to 19100. [2021-02-19 17:20:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19100 states, 19099 states have (on average 2.581653489711503) internal successors, (49307), 19099 states have internal predecessors, (49307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19100 states to 19100 states and 49307 transitions. [2021-02-19 17:20:52,127 INFO L78 Accepts]: Start accepts. Automaton has 19100 states and 49307 transitions. Word has length 53 [2021-02-19 17:20:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:52,127 INFO L480 AbstractCegarLoop]: Abstraction has 19100 states and 49307 transitions. [2021-02-19 17:20:52,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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) [2021-02-19 17:20:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 19100 states and 49307 transitions. [2021-02-19 17:20:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:52,138 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:52,138 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:52,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:52,339 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash -861279754, now seen corresponding path program 104 times [2021-02-19 17:20:52,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:52,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439734269] [2021-02-19 17:20:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:52,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439734269] [2021-02-19 17:20:52,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394774925] [2021-02-19 17:20:52,441 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:52,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:52,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:52,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:52,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:20:52,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078610612] [2021-02-19 17:20:52,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:20:52,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:52,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:20:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:52,583 INFO L87 Difference]: Start difference. First operand 19100 states and 49307 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2021-02-19 17:20:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:53,093 INFO L93 Difference]: Finished difference Result 27695 states and 68780 transitions. [2021-02-19 17:20:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:20:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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 53 [2021-02-19 17:20:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:53,132 INFO L225 Difference]: With dead ends: 27695 [2021-02-19 17:20:53,132 INFO L226 Difference]: Without dead ends: 27695 [2021-02-19 17:20:53,133 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:20:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27695 states. [2021-02-19 17:20:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27695 to 19141. [2021-02-19 17:20:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19141 states, 19140 states have (on average 2.5824973876698016) internal successors, (49429), 19140 states have internal predecessors, (49429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19141 states to 19141 states and 49429 transitions. [2021-02-19 17:20:53,483 INFO L78 Accepts]: Start accepts. Automaton has 19141 states and 49429 transitions. Word has length 53 [2021-02-19 17:20:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:53,483 INFO L480 AbstractCegarLoop]: Abstraction has 19141 states and 49429 transitions. [2021-02-19 17:20:53,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2021-02-19 17:20:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 19141 states and 49429 transitions. [2021-02-19 17:20:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:53,494 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:53,494 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:53,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:53,695 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:53,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1900566766, now seen corresponding path program 105 times [2021-02-19 17:20:53,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:53,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73806732] [2021-02-19 17:20:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:53,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73806732] [2021-02-19 17:20:53,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257525295] [2021-02-19 17:20:53,812 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:53,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-02-19 17:20:53,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:53,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:20:53,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 112 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:54,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:54,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-02-19 17:20:54,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205132225] [2021-02-19 17:20:54,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:20:54,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:54,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:20:54,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:20:54,018 INFO L87 Difference]: Start difference. First operand 19141 states and 49429 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:54,434 INFO L93 Difference]: Finished difference Result 21462 states and 53840 transitions. [2021-02-19 17:20:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:20:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:54,461 INFO L225 Difference]: With dead ends: 21462 [2021-02-19 17:20:54,461 INFO L226 Difference]: Without dead ends: 21462 [2021-02-19 17:20:54,461 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:20:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21462 states. [2021-02-19 17:20:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21462 to 18659. [2021-02-19 17:20:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18659 states, 18658 states have (on average 2.5785185979204632) internal successors, (48110), 18658 states have internal predecessors, (48110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18659 states to 18659 states and 48110 transitions. [2021-02-19 17:20:54,806 INFO L78 Accepts]: Start accepts. Automaton has 18659 states and 48110 transitions. Word has length 53 [2021-02-19 17:20:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:54,806 INFO L480 AbstractCegarLoop]: Abstraction has 18659 states and 48110 transitions. [2021-02-19 17:20:54,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 18659 states and 48110 transitions. [2021-02-19 17:20:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:54,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:54,817 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:55,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:55,018 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:55,018 INFO L82 PathProgramCache]: Analyzing trace with hash -219319850, now seen corresponding path program 193 times [2021-02-19 17:20:55,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:55,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347876988] [2021-02-19 17:20:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:55,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347876988] [2021-02-19 17:20:55,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043448296] [2021-02-19 17:20:55,151 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:55,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:55,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:55,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:55,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-02-19 17:20:55,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946509951] [2021-02-19 17:20:55,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:20:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:20:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:20:55,290 INFO L87 Difference]: Start difference. First operand 18659 states and 48110 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-02-19 17:20:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:55,656 INFO L93 Difference]: Finished difference Result 21232 states and 53477 transitions. [2021-02-19 17:20:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:20:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 53 [2021-02-19 17:20:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:55,683 INFO L225 Difference]: With dead ends: 21232 [2021-02-19 17:20:55,683 INFO L226 Difference]: Without dead ends: 21187 [2021-02-19 17:20:55,684 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21187 states. [2021-02-19 17:20:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21187 to 18659. [2021-02-19 17:20:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18659 states, 18658 states have (on average 2.5780362311073) internal successors, (48101), 18658 states have internal predecessors, (48101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18659 states to 18659 states and 48101 transitions. [2021-02-19 17:20:55,987 INFO L78 Accepts]: Start accepts. Automaton has 18659 states and 48101 transitions. Word has length 53 [2021-02-19 17:20:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:55,987 INFO L480 AbstractCegarLoop]: Abstraction has 18659 states and 48101 transitions. [2021-02-19 17:20:55,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-02-19 17:20:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 18659 states and 48101 transitions. [2021-02-19 17:20:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:55,998 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:55,998 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:56,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable696,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:56,200 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:56,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:56,200 INFO L82 PathProgramCache]: Analyzing trace with hash 884085733, now seen corresponding path program 106 times [2021-02-19 17:20:56,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:56,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474959454] [2021-02-19 17:20:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:56,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474959454] [2021-02-19 17:20:56,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515362625] [2021-02-19 17:20:56,306 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:56,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:56,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:56,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:56,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:56,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:20:56,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731076262] [2021-02-19 17:20:56,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:56,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:56,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:56,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:56,441 INFO L87 Difference]: Start difference. First operand 18659 states and 48101 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:20:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:57,031 INFO L93 Difference]: Finished difference Result 19898 states and 50622 transitions. [2021-02-19 17:20:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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 53 [2021-02-19 17:20:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:57,055 INFO L225 Difference]: With dead ends: 19898 [2021-02-19 17:20:57,055 INFO L226 Difference]: Without dead ends: 19881 [2021-02-19 17:20:57,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19881 states. [2021-02-19 17:20:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19881 to 18804. [2021-02-19 17:20:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18804 states, 18803 states have (on average 2.5758655533691432) internal successors, (48434), 18803 states have internal predecessors, (48434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18804 states to 18804 states and 48434 transitions. [2021-02-19 17:20:57,336 INFO L78 Accepts]: Start accepts. Automaton has 18804 states and 48434 transitions. Word has length 53 [2021-02-19 17:20:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:57,336 INFO L480 AbstractCegarLoop]: Abstraction has 18804 states and 48434 transitions. [2021-02-19 17:20:57,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 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) [2021-02-19 17:20:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 18804 states and 48434 transitions. [2021-02-19 17:20:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:57,347 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:57,347 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:57,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-02-19 17:20:57,547 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash -462548558, now seen corresponding path program 194 times [2021-02-19 17:20:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:57,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398159441] [2021-02-19 17:20:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:57,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398159441] [2021-02-19 17:20:57,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992745640] [2021-02-19 17:20:57,625 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:57,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:20:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:20:57,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:57,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:20:57,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369174396] [2021-02-19 17:20:57,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:57,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:57,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:57,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:57,762 INFO L87 Difference]: Start difference. First operand 18804 states and 48434 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:58,003 INFO L93 Difference]: Finished difference Result 21650 states and 54333 transitions. [2021-02-19 17:20:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:20:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:20:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:58,031 INFO L225 Difference]: With dead ends: 21650 [2021-02-19 17:20:58,031 INFO L226 Difference]: Without dead ends: 21632 [2021-02-19 17:20:58,031 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:20:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21632 states. [2021-02-19 17:20:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21632 to 18804. [2021-02-19 17:20:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18804 states, 18803 states have (on average 2.5746423443067594) internal successors, (48411), 18803 states have internal predecessors, (48411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18804 states to 18804 states and 48411 transitions. [2021-02-19 17:20:58,404 INFO L78 Accepts]: Start accepts. Automaton has 18804 states and 48411 transitions. Word has length 53 [2021-02-19 17:20:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:58,404 INFO L480 AbstractCegarLoop]: Abstraction has 18804 states and 48411 transitions. [2021-02-19 17:20:58,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 18804 states and 48411 transitions. [2021-02-19 17:20:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:58,415 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:58,415 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:58,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:58,615 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:58,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1910548571, now seen corresponding path program 195 times [2021-02-19 17:20:58,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:58,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899666497] [2021-02-19 17:20:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:58,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899666497] [2021-02-19 17:20:58,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094225113] [2021-02-19 17:20:58,712 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:58,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-02-19 17:20:58,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:20:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:20:58,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:58,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:20:58,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700079709] [2021-02-19 17:20:58,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:20:58,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:58,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:20:58,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:20:58,866 INFO L87 Difference]: Start difference. First operand 18804 states and 48411 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:20:59,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:59,605 INFO L93 Difference]: Finished difference Result 19541 states and 49768 transitions. [2021-02-19 17:20:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:59,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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 53 [2021-02-19 17:20:59,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:59,629 INFO L225 Difference]: With dead ends: 19541 [2021-02-19 17:20:59,629 INFO L226 Difference]: Without dead ends: 19429 [2021-02-19 17:20:59,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:20:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-02-19 17:20:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 18738. [2021-02-19 17:20:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18738 states, 18737 states have (on average 2.572450232160965) internal successors, (48200), 18737 states have internal predecessors, (48200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18738 states to 18738 states and 48200 transitions. [2021-02-19 17:20:59,901 INFO L78 Accepts]: Start accepts. Automaton has 18738 states and 48200 transitions. Word has length 53 [2021-02-19 17:20:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:59,901 INFO L480 AbstractCegarLoop]: Abstraction has 18738 states and 48200 transitions. [2021-02-19 17:20:59,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 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) [2021-02-19 17:20:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18738 states and 48200 transitions. [2021-02-19 17:20:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:20:59,911 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:59,911 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:00,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:00,111 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1770882545, now seen corresponding path program 196 times [2021-02-19 17:21:00,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:00,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485752491] [2021-02-19 17:21:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:21:00,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485752491] [2021-02-19 17:21:00,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69455888] [2021-02-19 17:21:00,224 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:00,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:00,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:21:00,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:00,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:21:00,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267399846] [2021-02-19 17:21:00,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:21:00,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:00,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:21:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:21:00,358 INFO L87 Difference]: Start difference. First operand 18738 states and 48200 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:21:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:00,964 INFO L93 Difference]: Finished difference Result 20077 states and 50948 transitions. [2021-02-19 17:21:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:21:00,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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 53 [2021-02-19 17:21:00,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:00,990 INFO L225 Difference]: With dead ends: 20077 [2021-02-19 17:21:00,990 INFO L226 Difference]: Without dead ends: 20014 [2021-02-19 17:21:00,990 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:21:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20014 states. [2021-02-19 17:21:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20014 to 18832. [2021-02-19 17:21:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18832 states, 18831 states have (on average 2.572354096967766) internal successors, (48440), 18831 states have internal predecessors, (48440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18832 states to 18832 states and 48440 transitions. [2021-02-19 17:21:01,286 INFO L78 Accepts]: Start accepts. Automaton has 18832 states and 48440 transitions. Word has length 53 [2021-02-19 17:21:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:01,286 INFO L480 AbstractCegarLoop]: Abstraction has 18832 states and 48440 transitions. [2021-02-19 17:21:01,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 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) [2021-02-19 17:21:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 18832 states and 48440 transitions. [2021-02-19 17:21:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:01,297 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:01,298 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:01,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:01,498 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash -382167417, now seen corresponding path program 197 times [2021-02-19 17:21:01,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:01,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783006822] [2021-02-19 17:21:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:01,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783006822] [2021-02-19 17:21:01,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489485931] [2021-02-19 17:21:01,599 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:01,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-02-19 17:21:01,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:01,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:01,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:01,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:01,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:21:01,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687588504] [2021-02-19 17:21:01,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:21:01,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:21:01,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:21:01,733 INFO L87 Difference]: Start difference. First operand 18832 states and 48440 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-02-19 17:21:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:02,619 INFO L93 Difference]: Finished difference Result 21835 states and 54919 transitions. [2021-02-19 17:21:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:21:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 53 [2021-02-19 17:21:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:02,645 INFO L225 Difference]: With dead ends: 21835 [2021-02-19 17:21:02,645 INFO L226 Difference]: Without dead ends: 21781 [2021-02-19 17:21:02,645 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:21:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21781 states. [2021-02-19 17:21:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21781 to 19157. [2021-02-19 17:21:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19157 states, 19156 states have (on average 2.575067863854667) internal successors, (49328), 19156 states have internal predecessors, (49328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19157 states to 19157 states and 49328 transitions. [2021-02-19 17:21:02,974 INFO L78 Accepts]: Start accepts. Automaton has 19157 states and 49328 transitions. Word has length 53 [2021-02-19 17:21:02,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:02,975 INFO L480 AbstractCegarLoop]: Abstraction has 19157 states and 49328 transitions. [2021-02-19 17:21:02,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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) [2021-02-19 17:21:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 19157 states and 49328 transitions. [2021-02-19 17:21:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:02,985 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:02,985 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:03,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:03,186 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1150391692, now seen corresponding path program 198 times [2021-02-19 17:21:03,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:03,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538893154] [2021-02-19 17:21:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:03,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538893154] [2021-02-19 17:21:03,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920382723] [2021-02-19 17:21:03,276 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:03,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-02-19 17:21:03,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:03,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:03,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:21:03,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079347168] [2021-02-19 17:21:03,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:21:03,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:03,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:21:03,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:21:03,419 INFO L87 Difference]: Start difference. First operand 19157 states and 49328 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:21:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:03,657 INFO L93 Difference]: Finished difference Result 22151 states and 55518 transitions. [2021-02-19 17:21:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:21:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 53 [2021-02-19 17:21:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:03,684 INFO L225 Difference]: With dead ends: 22151 [2021-02-19 17:21:03,684 INFO L226 Difference]: Without dead ends: 22127 [2021-02-19 17:21:03,684 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:21:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22127 states. [2021-02-19 17:21:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22127 to 19157. [2021-02-19 17:21:03,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19157 states, 19156 states have (on average 2.574180413447484) internal successors, (49311), 19156 states have internal predecessors, (49311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19157 states to 19157 states and 49311 transitions. [2021-02-19 17:21:03,976 INFO L78 Accepts]: Start accepts. Automaton has 19157 states and 49311 transitions. Word has length 53 [2021-02-19 17:21:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:03,976 INFO L480 AbstractCegarLoop]: Abstraction has 19157 states and 49311 transitions. [2021-02-19 17:21:03,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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) [2021-02-19 17:21:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 19157 states and 49311 transitions. [2021-02-19 17:21:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:03,986 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:03,986 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:04,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-02-19 17:21:04,187 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash -227330883, now seen corresponding path program 199 times [2021-02-19 17:21:04,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:04,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879420986] [2021-02-19 17:21:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:04,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879420986] [2021-02-19 17:21:04,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779714269] [2021-02-19 17:21:04,299 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:04,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:04,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:04,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:04,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:21:04,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981148389] [2021-02-19 17:21:04,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:21:04,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:04,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:21:04,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:21:04,430 INFO L87 Difference]: Start difference. First operand 19157 states and 49311 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) [2021-02-19 17:21:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:05,715 INFO L93 Difference]: Finished difference Result 25856 states and 64087 transitions. [2021-02-19 17:21:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 17:21:05,715 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 53 [2021-02-19 17:21:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:05,749 INFO L225 Difference]: With dead ends: 25856 [2021-02-19 17:21:05,749 INFO L226 Difference]: Without dead ends: 25688 [2021-02-19 17:21:05,749 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 17:21:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25688 states. [2021-02-19 17:21:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25688 to 19780. [2021-02-19 17:21:06,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 2.577531725567521) internal successors, (50981), 19779 states have internal predecessors, (50981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 50981 transitions. [2021-02-19 17:21:06,095 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 50981 transitions. Word has length 53 [2021-02-19 17:21:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:06,095 INFO L480 AbstractCegarLoop]: Abstraction has 19780 states and 50981 transitions. [2021-02-19 17:21:06,096 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) [2021-02-19 17:21:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 50981 transitions. [2021-02-19 17:21:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:06,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:06,107 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:06,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:06,307 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:06,307 INFO L82 PathProgramCache]: Analyzing trace with hash 159271794, now seen corresponding path program 200 times [2021-02-19 17:21:06,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:06,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932997687] [2021-02-19 17:21:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:06,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932997687] [2021-02-19 17:21:06,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321590749] [2021-02-19 17:21:06,411 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:06,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:21:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:06,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:06,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:06,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:21:06,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870390371] [2021-02-19 17:21:06,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:21:06,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:06,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:21:06,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:21:06,550 INFO L87 Difference]: Start difference. First operand 19780 states and 50981 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) [2021-02-19 17:21:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:06,897 INFO L93 Difference]: Finished difference Result 22950 states and 57504 transitions. [2021-02-19 17:21:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:21:06,898 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 53 [2021-02-19 17:21:06,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:06,923 INFO L225 Difference]: With dead ends: 22950 [2021-02-19 17:21:06,923 INFO L226 Difference]: Without dead ends: 22917 [2021-02-19 17:21:06,923 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:21:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22917 states. [2021-02-19 17:21:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22917 to 19780. [2021-02-19 17:21:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 19779 states have (on average 2.5770766975074575) internal successors, (50972), 19779 states have internal predecessors, (50972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 50972 transitions. [2021-02-19 17:21:07,213 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 50972 transitions. Word has length 53 [2021-02-19 17:21:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:07,213 INFO L480 AbstractCegarLoop]: Abstraction has 19780 states and 50972 transitions. [2021-02-19 17:21:07,213 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) [2021-02-19 17:21:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 50972 transitions. [2021-02-19 17:21:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:07,224 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:07,224 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:07,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:07,424 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash -287022393, now seen corresponding path program 201 times [2021-02-19 17:21:07,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:07,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824299931] [2021-02-19 17:21:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:07,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824299931] [2021-02-19 17:21:07,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395284777] [2021-02-19 17:21:07,557 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:07,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 17:21:07,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:07,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:07,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:21:07,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708166537] [2021-02-19 17:21:07,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:21:07,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:07,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:21:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:21:07,692 INFO L87 Difference]: Start difference. First operand 19780 states and 50972 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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) [2021-02-19 17:21:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:09,589 INFO L93 Difference]: Finished difference Result 34794 states and 84439 transitions. [2021-02-19 17:21:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-02-19 17:21:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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 53 [2021-02-19 17:21:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:09,638 INFO L225 Difference]: With dead ends: 34794 [2021-02-19 17:21:09,638 INFO L226 Difference]: Without dead ends: 34272 [2021-02-19 17:21:09,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 17:21:09,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34272 states. [2021-02-19 17:21:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34272 to 20774. [2021-02-19 17:21:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20774 states, 20773 states have (on average 2.5814759543638375) internal successors, (53625), 20773 states have internal predecessors, (53625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20774 states to 20774 states and 53625 transitions. [2021-02-19 17:21:10,063 INFO L78 Accepts]: Start accepts. Automaton has 20774 states and 53625 transitions. Word has length 53 [2021-02-19 17:21:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:10,063 INFO L480 AbstractCegarLoop]: Abstraction has 20774 states and 53625 transitions. [2021-02-19 17:21:10,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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) [2021-02-19 17:21:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20774 states and 53625 transitions. [2021-02-19 17:21:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:10,075 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:10,076 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:10,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-02-19 17:21:10,276 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:10,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:10,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1606550476, now seen corresponding path program 202 times [2021-02-19 17:21:10,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:10,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899025504] [2021-02-19 17:21:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:10,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899025504] [2021-02-19 17:21:10,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004797433] [2021-02-19 17:21:10,390 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:10,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:10,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:10,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:10,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:21:10,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17967543] [2021-02-19 17:21:10,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:21:10,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:10,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:21:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:21:10,531 INFO L87 Difference]: Start difference. First operand 20774 states and 53625 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:10,834 INFO L93 Difference]: Finished difference Result 24229 states and 60687 transitions. [2021-02-19 17:21:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:21:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:10,864 INFO L225 Difference]: With dead ends: 24229 [2021-02-19 17:21:10,864 INFO L226 Difference]: Without dead ends: 24187 [2021-02-19 17:21:10,864 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:21:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24187 states. [2021-02-19 17:21:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24187 to 20774. [2021-02-19 17:21:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20774 states, 20773 states have (on average 2.58104269965821) internal successors, (53616), 20773 states have internal predecessors, (53616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20774 states to 20774 states and 53616 transitions. [2021-02-19 17:21:11,236 INFO L78 Accepts]: Start accepts. Automaton has 20774 states and 53616 transitions. Word has length 53 [2021-02-19 17:21:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:11,236 INFO L480 AbstractCegarLoop]: Abstraction has 20774 states and 53616 transitions. [2021-02-19 17:21:11,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20774 states and 53616 transitions. [2021-02-19 17:21:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:11,247 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:11,248 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:11,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:11,448 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash -440336259, now seen corresponding path program 203 times [2021-02-19 17:21:11,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:11,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434634500] [2021-02-19 17:21:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:11,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434634500] [2021-02-19 17:21:11,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826200423] [2021-02-19 17:21:11,602 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:11,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-02-19 17:21:11,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:11,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:11,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:11,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:11,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:21:11,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897556026] [2021-02-19 17:21:11,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:21:11,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:21:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:21:11,747 INFO L87 Difference]: Start difference. First operand 20774 states and 53616 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-02-19 17:21:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:14,700 INFO L93 Difference]: Finished difference Result 42542 states and 102891 transitions. [2021-02-19 17:21:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-02-19 17:21:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 53 [2021-02-19 17:21:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:14,761 INFO L225 Difference]: With dead ends: 42542 [2021-02-19 17:21:14,761 INFO L226 Difference]: Without dead ends: 41924 [2021-02-19 17:21:14,762 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1461, Invalid=15051, Unknown=0, NotChecked=0, Total=16512 [2021-02-19 17:21:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41924 states. [2021-02-19 17:21:15,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41924 to 21585. [2021-02-19 17:21:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21585 states, 21584 states have (on average 2.583441438102298) internal successors, (55761), 21584 states have internal predecessors, (55761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21585 states to 21585 states and 55761 transitions. [2021-02-19 17:21:15,230 INFO L78 Accepts]: Start accepts. Automaton has 21585 states and 55761 transitions. Word has length 53 [2021-02-19 17:21:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:15,231 INFO L480 AbstractCegarLoop]: Abstraction has 21585 states and 55761 transitions. [2021-02-19 17:21:15,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-02-19 17:21:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 21585 states and 55761 transitions. [2021-02-19 17:21:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:15,242 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:15,242 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:15,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2021-02-19 17:21:15,452 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:15,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:15,452 INFO L82 PathProgramCache]: Analyzing trace with hash 309081394, now seen corresponding path program 204 times [2021-02-19 17:21:15,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:15,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763777016] [2021-02-19 17:21:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:15,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763777016] [2021-02-19 17:21:15,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925871867] [2021-02-19 17:21:15,580 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:15,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:21:15,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:15,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:15,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:15,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-02-19 17:21:15,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495203674] [2021-02-19 17:21:15,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:21:15,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:15,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:21:15,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:21:15,715 INFO L87 Difference]: Start difference. First operand 21585 states and 55761 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-02-19 17:21:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:16,150 INFO L93 Difference]: Finished difference Result 25184 states and 63104 transitions. [2021-02-19 17:21:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:21:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 53 [2021-02-19 17:21:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:16,186 INFO L225 Difference]: With dead ends: 25184 [2021-02-19 17:21:16,186 INFO L226 Difference]: Without dead ends: 25133 [2021-02-19 17:21:16,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:21:16,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25133 states. [2021-02-19 17:21:16,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25133 to 21275. [2021-02-19 17:21:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21275 states, 21274 states have (on average 2.580661840744571) internal successors, (54901), 21274 states have internal predecessors, (54901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21275 states to 21275 states and 54901 transitions. [2021-02-19 17:21:16,537 INFO L78 Accepts]: Start accepts. Automaton has 21275 states and 54901 transitions. Word has length 53 [2021-02-19 17:21:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:16,537 INFO L480 AbstractCegarLoop]: Abstraction has 21275 states and 54901 transitions. [2021-02-19 17:21:16,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-02-19 17:21:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 21275 states and 54901 transitions. [2021-02-19 17:21:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:16,548 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:16,548 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:16,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:16,748 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2031484679, now seen corresponding path program 205 times [2021-02-19 17:21:16,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:16,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629600466] [2021-02-19 17:21:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:16,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629600466] [2021-02-19 17:21:16,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668678833] [2021-02-19 17:21:16,903 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:17,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:17,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:21:17,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201776534] [2021-02-19 17:21:17,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:21:17,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:21:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:21:17,029 INFO L87 Difference]: Start difference. First operand 21275 states and 54901 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-02-19 17:21:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:18,055 INFO L93 Difference]: Finished difference Result 29892 states and 72882 transitions. [2021-02-19 17:21:18,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:21:18,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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 53 [2021-02-19 17:21:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:18,093 INFO L225 Difference]: With dead ends: 29892 [2021-02-19 17:21:18,093 INFO L226 Difference]: Without dead ends: 29052 [2021-02-19 17:21:18,093 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:21:18,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29052 states. [2021-02-19 17:21:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29052 to 18251. [2021-02-19 17:21:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18251 states, 18250 states have (on average 2.5656438356164384) internal successors, (46823), 18250 states have internal predecessors, (46823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18251 states to 18251 states and 46823 transitions. [2021-02-19 17:21:18,410 INFO L78 Accepts]: Start accepts. Automaton has 18251 states and 46823 transitions. Word has length 53 [2021-02-19 17:21:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:18,410 INFO L480 AbstractCegarLoop]: Abstraction has 18251 states and 46823 transitions. [2021-02-19 17:21:18,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 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) [2021-02-19 17:21:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 18251 states and 46823 transitions. [2021-02-19 17:21:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:18,420 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:18,420 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:18,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable735 [2021-02-19 17:21:18,621 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1793423162, now seen corresponding path program 107 times [2021-02-19 17:21:18,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:18,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688818942] [2021-02-19 17:21:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:18,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688818942] [2021-02-19 17:21:18,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658842285] [2021-02-19 17:21:18,712 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:18,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-02-19 17:21:18,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:18,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:18,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:18,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:18,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2021-02-19 17:21:18,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404653921] [2021-02-19 17:21:18,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:21:18,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:18,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:21:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:21:18,918 INFO L87 Difference]: Start difference. First operand 18251 states and 46823 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:19,333 INFO L93 Difference]: Finished difference Result 21226 states and 53133 transitions. [2021-02-19 17:21:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:21:19,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:19,359 INFO L225 Difference]: With dead ends: 21226 [2021-02-19 17:21:19,359 INFO L226 Difference]: Without dead ends: 21212 [2021-02-19 17:21:19,359 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:21:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21212 states. [2021-02-19 17:21:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21212 to 18650. [2021-02-19 17:21:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18650 states, 18649 states have (on average 2.5690921765242103) internal successors, (47911), 18649 states have internal predecessors, (47911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18650 states to 18650 states and 47911 transitions. [2021-02-19 17:21:19,731 INFO L78 Accepts]: Start accepts. Automaton has 18650 states and 47911 transitions. Word has length 53 [2021-02-19 17:21:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:19,731 INFO L480 AbstractCegarLoop]: Abstraction has 18650 states and 47911 transitions. [2021-02-19 17:21:19,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 18650 states and 47911 transitions. [2021-02-19 17:21:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:19,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:19,740 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:19,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:19,940 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:19,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1171542752, now seen corresponding path program 108 times [2021-02-19 17:21:19,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:19,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017600562] [2021-02-19 17:21:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:20,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017600562] [2021-02-19 17:21:20,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001858540] [2021-02-19 17:21:20,021 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:20,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-02-19 17:21:20,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:20,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:20,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:20,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:20,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:21:20,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732802478] [2021-02-19 17:21:20,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:21:20,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:20,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:21:20,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:21:20,168 INFO L87 Difference]: Start difference. First operand 18650 states and 47911 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:21:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:20,505 INFO L93 Difference]: Finished difference Result 24382 states and 60480 transitions. [2021-02-19 17:21:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:21:20,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 53 [2021-02-19 17:21:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:20,534 INFO L225 Difference]: With dead ends: 24382 [2021-02-19 17:21:20,534 INFO L226 Difference]: Without dead ends: 24382 [2021-02-19 17:21:20,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:21:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24382 states. [2021-02-19 17:21:20,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24382 to 18658. [2021-02-19 17:21:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18658 states, 18657 states have (on average 2.5693305461756983) internal successors, (47936), 18657 states have internal predecessors, (47936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18658 states to 18658 states and 47936 transitions. [2021-02-19 17:21:20,833 INFO L78 Accepts]: Start accepts. Automaton has 18658 states and 47936 transitions. Word has length 53 [2021-02-19 17:21:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:20,833 INFO L480 AbstractCegarLoop]: Abstraction has 18658 states and 47936 transitions. [2021-02-19 17:21:20,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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) [2021-02-19 17:21:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 18658 states and 47936 transitions. [2021-02-19 17:21:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:20,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:20,845 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:21,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-02-19 17:21:21,050 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash -466029704, now seen corresponding path program 109 times [2021-02-19 17:21:21,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:21,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586200248] [2021-02-19 17:21:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:21,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586200248] [2021-02-19 17:21:21,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393392585] [2021-02-19 17:21:21,144 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:21,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:21,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:21:21,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188817927] [2021-02-19 17:21:21,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:21:21,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:21,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:21:21,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:21:21,286 INFO L87 Difference]: Start difference. First operand 18658 states and 47936 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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) [2021-02-19 17:21:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:21,767 INFO L93 Difference]: Finished difference Result 26313 states and 65049 transitions. [2021-02-19 17:21:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:21:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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 53 [2021-02-19 17:21:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:21,803 INFO L225 Difference]: With dead ends: 26313 [2021-02-19 17:21:21,803 INFO L226 Difference]: Without dead ends: 26313 [2021-02-19 17:21:21,803 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:21:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26313 states. [2021-02-19 17:21:22,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26313 to 18677. [2021-02-19 17:21:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18677 states, 18676 states have (on average 2.569929321053759) internal successors, (47996), 18676 states have internal predecessors, (47996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18677 states to 18677 states and 47996 transitions. [2021-02-19 17:21:22,153 INFO L78 Accepts]: Start accepts. Automaton has 18677 states and 47996 transitions. Word has length 53 [2021-02-19 17:21:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:22,153 INFO L480 AbstractCegarLoop]: Abstraction has 18677 states and 47996 transitions. [2021-02-19 17:21:22,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 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) [2021-02-19 17:21:22,153 INFO L276 IsEmpty]: Start isEmpty. Operand 18677 states and 47996 transitions. [2021-02-19 17:21:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:22,163 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:22,164 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:22,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:22,364 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2138942428, now seen corresponding path program 110 times [2021-02-19 17:21:22,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:22,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616806212] [2021-02-19 17:21:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:22,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616806212] [2021-02-19 17:21:22,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702025148] [2021-02-19 17:21:22,473 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:22,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:21:22,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:22,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:22,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:22,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:21:22,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447771805] [2021-02-19 17:21:22,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:21:22,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:22,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:21:22,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:21:22,616 INFO L87 Difference]: Start difference. First operand 18677 states and 47996 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2021-02-19 17:21:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:23,212 INFO L93 Difference]: Finished difference Result 26827 states and 66301 transitions. [2021-02-19 17:21:23,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:21:23,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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 53 [2021-02-19 17:21:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:23,249 INFO L225 Difference]: With dead ends: 26827 [2021-02-19 17:21:23,250 INFO L226 Difference]: Without dead ends: 26827 [2021-02-19 17:21:23,250 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:21:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-02-19 17:21:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 18702. [2021-02-19 17:21:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18702 states, 18701 states have (on average 2.5706646703384846) internal successors, (48074), 18701 states have internal predecessors, (48074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18702 states to 18702 states and 48074 transitions. [2021-02-19 17:21:23,627 INFO L78 Accepts]: Start accepts. Automaton has 18702 states and 48074 transitions. Word has length 53 [2021-02-19 17:21:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:23,627 INFO L480 AbstractCegarLoop]: Abstraction has 18702 states and 48074 transitions. [2021-02-19 17:21:23,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 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) [2021-02-19 17:21:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 18702 states and 48074 transitions. [2021-02-19 17:21:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:23,638 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:23,638 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:23,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-02-19 17:21:23,838 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:23,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1099655416, now seen corresponding path program 111 times [2021-02-19 17:21:23,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:23,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98082567] [2021-02-19 17:21:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 92 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:23,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98082567] [2021-02-19 17:21:23,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953239652] [2021-02-19 17:21:23,962 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:23,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 17:21:23,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:23,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:21:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:24,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:24,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-02-19 17:21:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329704990] [2021-02-19 17:21:24,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:21:24,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:21:24,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:21:24,178 INFO L87 Difference]: Start difference. First operand 18702 states and 48074 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:24,839 INFO L93 Difference]: Finished difference Result 21378 states and 53479 transitions. [2021-02-19 17:21:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:21:24,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:24,864 INFO L225 Difference]: With dead ends: 21378 [2021-02-19 17:21:24,864 INFO L226 Difference]: Without dead ends: 21378 [2021-02-19 17:21:24,865 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:21:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21378 states. [2021-02-19 17:21:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21378 to 17918. [2021-02-19 17:21:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17918 states, 17917 states have (on average 2.5676173466540155) internal successors, (46004), 17917 states have internal predecessors, (46004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17918 states to 17918 states and 46004 transitions. [2021-02-19 17:21:25,134 INFO L78 Accepts]: Start accepts. Automaton has 17918 states and 46004 transitions. Word has length 53 [2021-02-19 17:21:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:25,134 INFO L480 AbstractCegarLoop]: Abstraction has 17918 states and 46004 transitions. [2021-02-19 17:21:25,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17918 states and 46004 transitions. [2021-02-19 17:21:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:25,143 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:25,143 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:25,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-02-19 17:21:25,344 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2113323532, now seen corresponding path program 206 times [2021-02-19 17:21:25,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:25,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446685123] [2021-02-19 17:21:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446685123] [2021-02-19 17:21:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204149465] [2021-02-19 17:21:25,495 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:25,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:21:25,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:25,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:25,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:25,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-02-19 17:21:25,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108591246] [2021-02-19 17:21:25,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:21:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:25,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:21:25,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:21:25,654 INFO L87 Difference]: Start difference. First operand 17918 states and 46004 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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) [2021-02-19 17:21:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:26,059 INFO L93 Difference]: Finished difference Result 20580 states and 51574 transitions. [2021-02-19 17:21:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:21:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 53 [2021-02-19 17:21:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:26,084 INFO L225 Difference]: With dead ends: 20580 [2021-02-19 17:21:26,085 INFO L226 Difference]: Without dead ends: 20526 [2021-02-19 17:21:26,085 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:21:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20526 states. [2021-02-19 17:21:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20526 to 17927. [2021-02-19 17:21:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.5668303023541226) internal successors, (46013), 17926 states have internal predecessors, (46013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 46013 transitions. [2021-02-19 17:21:26,358 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 46013 transitions. Word has length 53 [2021-02-19 17:21:26,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:26,358 INFO L480 AbstractCegarLoop]: Abstraction has 17927 states and 46013 transitions. [2021-02-19 17:21:26,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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) [2021-02-19 17:21:26,358 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 46013 transitions. [2021-02-19 17:21:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:26,368 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:26,368 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:26,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-02-19 17:21:26,568 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2078851840, now seen corresponding path program 207 times [2021-02-19 17:21:26,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:26,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807575110] [2021-02-19 17:21:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:26,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807575110] [2021-02-19 17:21:26,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979163867] [2021-02-19 17:21:26,720 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:26,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 17:21:26,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:26,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:26,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-02-19 17:21:26,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091515082] [2021-02-19 17:21:26,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:21:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:21:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:21:26,863 INFO L87 Difference]: Start difference. First operand 17927 states and 46013 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-02-19 17:21:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:27,368 INFO L93 Difference]: Finished difference Result 20642 states and 52127 transitions. [2021-02-19 17:21:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:21:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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 53 [2021-02-19 17:21:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:27,393 INFO L225 Difference]: With dead ends: 20642 [2021-02-19 17:21:27,393 INFO L226 Difference]: Without dead ends: 20642 [2021-02-19 17:21:27,394 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:21:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20642 states. [2021-02-19 17:21:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20642 to 18179. [2021-02-19 17:21:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18179 states, 18178 states have (on average 2.576411046319727) internal successors, (46834), 18178 states have internal predecessors, (46834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18179 states to 18179 states and 46834 transitions. [2021-02-19 17:21:27,712 INFO L78 Accepts]: Start accepts. Automaton has 18179 states and 46834 transitions. Word has length 53 [2021-02-19 17:21:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:27,712 INFO L480 AbstractCegarLoop]: Abstraction has 18179 states and 46834 transitions. [2021-02-19 17:21:27,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 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) [2021-02-19 17:21:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 18179 states and 46834 transitions. [2021-02-19 17:21:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:27,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:27,723 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:27,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-02-19 17:21:27,923 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1980297313, now seen corresponding path program 112 times [2021-02-19 17:21:27,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:27,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134321356] [2021-02-19 17:21:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134321356] [2021-02-19 17:21:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392825965] [2021-02-19 17:21:28,085 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:28,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:28,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:28,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:28,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:28,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:21:28,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356381803] [2021-02-19 17:21:28,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:21:28,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:21:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:21:28,221 INFO L87 Difference]: Start difference. First operand 18179 states and 46834 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-02-19 17:21:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:29,110 INFO L93 Difference]: Finished difference Result 28924 states and 71812 transitions. [2021-02-19 17:21:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:21:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 53 [2021-02-19 17:21:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:29,148 INFO L225 Difference]: With dead ends: 28924 [2021-02-19 17:21:29,148 INFO L226 Difference]: Without dead ends: 28730 [2021-02-19 17:21:29,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:21:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28730 states. [2021-02-19 17:21:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28730 to 17894. [2021-02-19 17:21:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17894 states, 17893 states have (on average 2.572570278880009) internal successors, (46031), 17893 states have internal predecessors, (46031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17894 states to 17894 states and 46031 transitions. [2021-02-19 17:21:29,468 INFO L78 Accepts]: Start accepts. Automaton has 17894 states and 46031 transitions. Word has length 53 [2021-02-19 17:21:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:29,468 INFO L480 AbstractCegarLoop]: Abstraction has 17894 states and 46031 transitions. [2021-02-19 17:21:29,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-02-19 17:21:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 17894 states and 46031 transitions. [2021-02-19 17:21:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:29,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:29,478 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:29,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:29,678 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1264685205, now seen corresponding path program 208 times [2021-02-19 17:21:29,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:29,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949464903] [2021-02-19 17:21:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:29,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949464903] [2021-02-19 17:21:29,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290346742] [2021-02-19 17:21:29,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:29,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:29,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:29,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:30,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:30,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-02-19 17:21:30,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888271591] [2021-02-19 17:21:30,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:21:30,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:21:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:21:30,132 INFO L87 Difference]: Start difference. First operand 17894 states and 46031 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:31,474 INFO L93 Difference]: Finished difference Result 18280 states and 46750 transitions. [2021-02-19 17:21:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:21:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:31,498 INFO L225 Difference]: With dead ends: 18280 [2021-02-19 17:21:31,498 INFO L226 Difference]: Without dead ends: 18120 [2021-02-19 17:21:31,498 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:21:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18120 states. [2021-02-19 17:21:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18120 to 17942. [2021-02-19 17:21:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17942 states, 17941 states have (on average 2.5672482024413354) internal successors, (46059), 17941 states have internal predecessors, (46059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17942 states to 17942 states and 46059 transitions. [2021-02-19 17:21:31,756 INFO L78 Accepts]: Start accepts. Automaton has 17942 states and 46059 transitions. Word has length 53 [2021-02-19 17:21:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:31,756 INFO L480 AbstractCegarLoop]: Abstraction has 17942 states and 46059 transitions. [2021-02-19 17:21:31,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 17942 states and 46059 transitions. [2021-02-19 17:21:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:31,766 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:31,766 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:31,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-02-19 17:21:31,966 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash -880609142, now seen corresponding path program 209 times [2021-02-19 17:21:31,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:31,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693621919] [2021-02-19 17:21:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:32,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693621919] [2021-02-19 17:21:32,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837003355] [2021-02-19 17:21:32,106 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:32,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:21:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:32,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:32,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:32,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 16 [2021-02-19 17:21:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764939874] [2021-02-19 17:21:32,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:21:32,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:21:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:21:32,273 INFO L87 Difference]: Start difference. First operand 17942 states and 46059 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) [2021-02-19 17:21:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:32,899 INFO L93 Difference]: Finished difference Result 21173 states and 53340 transitions. [2021-02-19 17:21:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:21:32,901 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 53 [2021-02-19 17:21:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:32,926 INFO L225 Difference]: With dead ends: 21173 [2021-02-19 17:21:32,926 INFO L226 Difference]: Without dead ends: 21173 [2021-02-19 17:21:32,926 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:21:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21173 states. [2021-02-19 17:21:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21173 to 18270. [2021-02-19 17:21:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18270 states, 18269 states have (on average 2.576605178170672) internal successors, (47072), 18269 states have internal predecessors, (47072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18270 states to 18270 states and 47072 transitions. [2021-02-19 17:21:33,212 INFO L78 Accepts]: Start accepts. Automaton has 18270 states and 47072 transitions. Word has length 53 [2021-02-19 17:21:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:33,212 INFO L480 AbstractCegarLoop]: Abstraction has 18270 states and 47072 transitions. [2021-02-19 17:21:33,212 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) [2021-02-19 17:21:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 18270 states and 47072 transitions. [2021-02-19 17:21:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:33,223 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:33,223 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:33,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable755,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:33,423 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2097202441, now seen corresponding path program 113 times [2021-02-19 17:21:33,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:33,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897533979] [2021-02-19 17:21:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:33,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897533979] [2021-02-19 17:21:33,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828200861] [2021-02-19 17:21:33,568 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:33,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:21:33,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:33,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:33,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:33,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:33,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:21:33,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603928684] [2021-02-19 17:21:33,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:21:33,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:21:33,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:21:33,712 INFO L87 Difference]: Start difference. First operand 18270 states and 47072 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-02-19 17:21:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:34,550 INFO L93 Difference]: Finished difference Result 27152 states and 67590 transitions. [2021-02-19 17:21:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:21:34,551 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 53 [2021-02-19 17:21:34,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:34,586 INFO L225 Difference]: With dead ends: 27152 [2021-02-19 17:21:34,586 INFO L226 Difference]: Without dead ends: 27100 [2021-02-19 17:21:34,586 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:21:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27100 states. [2021-02-19 17:21:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27100 to 18029. [2021-02-19 17:21:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18029 states, 18028 states have (on average 2.5790991790548037) internal successors, (46496), 18028 states have internal predecessors, (46496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18029 states to 18029 states and 46496 transitions. [2021-02-19 17:21:34,918 INFO L78 Accepts]: Start accepts. Automaton has 18029 states and 46496 transitions. Word has length 53 [2021-02-19 17:21:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:34,918 INFO L480 AbstractCegarLoop]: Abstraction has 18029 states and 46496 transitions. [2021-02-19 17:21:34,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-02-19 17:21:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 18029 states and 46496 transitions. [2021-02-19 17:21:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:34,928 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:34,928 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:35,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-02-19 17:21:35,128 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash -521513707, now seen corresponding path program 210 times [2021-02-19 17:21:35,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:35,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916250026] [2021-02-19 17:21:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 115 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:35,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916250026] [2021-02-19 17:21:35,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725093305] [2021-02-19 17:21:35,270 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:35,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 17:21:35,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:35,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:35,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:35,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-02-19 17:21:35,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151831889] [2021-02-19 17:21:35,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:21:35,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:35,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:21:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:21:35,528 INFO L87 Difference]: Start difference. First operand 18029 states and 46496 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:36,616 INFO L93 Difference]: Finished difference Result 18428 states and 47203 transitions. [2021-02-19 17:21:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:21:36,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:36,639 INFO L225 Difference]: With dead ends: 18428 [2021-02-19 17:21:36,639 INFO L226 Difference]: Without dead ends: 18304 [2021-02-19 17:21:36,639 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:21:36,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-02-19 17:21:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18002. [2021-02-19 17:21:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18002 states, 18001 states have (on average 2.5769123937559026) internal successors, (46387), 18001 states have internal predecessors, (46387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18002 states to 18002 states and 46387 transitions. [2021-02-19 17:21:36,902 INFO L78 Accepts]: Start accepts. Automaton has 18002 states and 46387 transitions. Word has length 53 [2021-02-19 17:21:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:36,902 INFO L480 AbstractCegarLoop]: Abstraction has 18002 states and 46387 transitions. [2021-02-19 17:21:36,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 18002 states and 46387 transitions. [2021-02-19 17:21:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:36,912 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:36,912 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:37,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:37,112 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:37,112 INFO L82 PathProgramCache]: Analyzing trace with hash -290292720, now seen corresponding path program 114 times [2021-02-19 17:21:37,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:37,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521661802] [2021-02-19 17:21:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:37,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521661802] [2021-02-19 17:21:37,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64587323] [2021-02-19 17:21:37,231 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:37,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:21:37,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:37,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:37,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:37,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-02-19 17:21:37,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114259091] [2021-02-19 17:21:37,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:21:37,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:21:37,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:21:37,398 INFO L87 Difference]: Start difference. First operand 18002 states and 46387 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:37,885 INFO L93 Difference]: Finished difference Result 20809 states and 52046 transitions. [2021-02-19 17:21:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:21:37,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:37,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:37,912 INFO L225 Difference]: With dead ends: 20809 [2021-02-19 17:21:37,912 INFO L226 Difference]: Without dead ends: 20759 [2021-02-19 17:21:37,912 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:21:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20759 states. [2021-02-19 17:21:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20759 to 17538. [2021-02-19 17:21:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17538 states, 17537 states have (on average 2.5746706962422308) internal successors, (45152), 17537 states have internal predecessors, (45152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17538 states to 17538 states and 45152 transitions. [2021-02-19 17:21:38,191 INFO L78 Accepts]: Start accepts. Automaton has 17538 states and 45152 transitions. Word has length 53 [2021-02-19 17:21:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:38,191 INFO L480 AbstractCegarLoop]: Abstraction has 17538 states and 45152 transitions. [2021-02-19 17:21:38,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 17538 states and 45152 transitions. [2021-02-19 17:21:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:38,200 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:38,200 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:38,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:38,401 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:38,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1595716596, now seen corresponding path program 211 times [2021-02-19 17:21:38,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:38,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432230516] [2021-02-19 17:21:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:38,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432230516] [2021-02-19 17:21:38,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350248047] [2021-02-19 17:21:38,525 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:38,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:38,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:38,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:21:38,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229785856] [2021-02-19 17:21:38,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:21:38,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:38,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:21:38,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:21:38,674 INFO L87 Difference]: Start difference. First operand 17538 states and 45152 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2021-02-19 17:21:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:39,117 INFO L93 Difference]: Finished difference Result 21028 states and 53064 transitions. [2021-02-19 17:21:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:21:39,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 53 [2021-02-19 17:21:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:39,145 INFO L225 Difference]: With dead ends: 21028 [2021-02-19 17:21:39,145 INFO L226 Difference]: Without dead ends: 21028 [2021-02-19 17:21:39,145 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:21:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2021-02-19 17:21:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 17538. [2021-02-19 17:21:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17538 states, 17537 states have (on average 2.582083594685522) internal successors, (45282), 17537 states have internal predecessors, (45282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17538 states to 17538 states and 45282 transitions. [2021-02-19 17:21:39,433 INFO L78 Accepts]: Start accepts. Automaton has 17538 states and 45282 transitions. Word has length 53 [2021-02-19 17:21:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:39,433 INFO L480 AbstractCegarLoop]: Abstraction has 17538 states and 45282 transitions. [2021-02-19 17:21:39,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2021-02-19 17:21:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17538 states and 45282 transitions. [2021-02-19 17:21:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:39,442 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:39,442 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:39,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-02-19 17:21:39,643 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2006879903, now seen corresponding path program 115 times [2021-02-19 17:21:39,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:39,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916210716] [2021-02-19 17:21:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:39,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916210716] [2021-02-19 17:21:39,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734769048] [2021-02-19 17:21:39,774 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:39,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:39,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:39,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:21:39,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339107644] [2021-02-19 17:21:39,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:21:39,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:21:39,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:21:39,910 INFO L87 Difference]: Start difference. First operand 17538 states and 45282 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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) [2021-02-19 17:21:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:40,713 INFO L93 Difference]: Finished difference Result 22570 states and 56695 transitions. [2021-02-19 17:21:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:21:40,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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 53 [2021-02-19 17:21:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:40,741 INFO L225 Difference]: With dead ends: 22570 [2021-02-19 17:21:40,741 INFO L226 Difference]: Without dead ends: 22556 [2021-02-19 17:21:40,741 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:21:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22556 states. [2021-02-19 17:21:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22556 to 17478. [2021-02-19 17:21:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17478 states, 17477 states have (on average 2.584368026549179) internal successors, (45167), 17477 states have internal predecessors, (45167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17478 states to 17478 states and 45167 transitions. [2021-02-19 17:21:41,027 INFO L78 Accepts]: Start accepts. Automaton has 17478 states and 45167 transitions. Word has length 53 [2021-02-19 17:21:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:41,027 INFO L480 AbstractCegarLoop]: Abstraction has 17478 states and 45167 transitions. [2021-02-19 17:21:41,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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) [2021-02-19 17:21:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 17478 states and 45167 transitions. [2021-02-19 17:21:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:41,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:41,036 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:41,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:41,237 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2126035297, now seen corresponding path program 212 times [2021-02-19 17:21:41,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:41,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930614986] [2021-02-19 17:21:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:41,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930614986] [2021-02-19 17:21:41,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861574380] [2021-02-19 17:21:41,389 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:41,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:21:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:41,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:41,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-02-19 17:21:41,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993197172] [2021-02-19 17:21:41,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:21:41,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:41,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:21:41,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:21:41,664 INFO L87 Difference]: Start difference. First operand 17478 states and 45167 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:42,562 INFO L93 Difference]: Finished difference Result 17642 states and 45426 transitions. [2021-02-19 17:21:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:21:42,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:42,586 INFO L225 Difference]: With dead ends: 17642 [2021-02-19 17:21:42,586 INFO L226 Difference]: Without dead ends: 17589 [2021-02-19 17:21:42,586 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:21:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17589 states. [2021-02-19 17:21:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17589 to 17469. [2021-02-19 17:21:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17469 states, 17468 states have (on average 2.5834669109228305) internal successors, (45128), 17468 states have internal predecessors, (45128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17469 states to 17469 states and 45128 transitions. [2021-02-19 17:21:42,850 INFO L78 Accepts]: Start accepts. Automaton has 17469 states and 45128 transitions. Word has length 53 [2021-02-19 17:21:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:42,850 INFO L480 AbstractCegarLoop]: Abstraction has 17469 states and 45128 transitions. [2021-02-19 17:21:42,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 17469 states and 45128 transitions. [2021-02-19 17:21:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:42,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:42,860 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:43,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-02-19 17:21:43,060 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:43,060 INFO L82 PathProgramCache]: Analyzing trace with hash 145337620, now seen corresponding path program 116 times [2021-02-19 17:21:43,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:43,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413829352] [2021-02-19 17:21:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:43,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413829352] [2021-02-19 17:21:43,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173688494] [2021-02-19 17:21:43,188 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:43,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:21:43,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:43,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:43,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:43,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:43,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-02-19 17:21:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385937485] [2021-02-19 17:21:43,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:21:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:21:43,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:21:43,335 INFO L87 Difference]: Start difference. First operand 17469 states and 45128 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-02-19 17:21:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:43,678 INFO L93 Difference]: Finished difference Result 19626 states and 49403 transitions. [2021-02-19 17:21:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:21:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 53 [2021-02-19 17:21:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:43,703 INFO L225 Difference]: With dead ends: 19626 [2021-02-19 17:21:43,704 INFO L226 Difference]: Without dead ends: 19542 [2021-02-19 17:21:43,704 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:21:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19542 states. [2021-02-19 17:21:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19542 to 15929. [2021-02-19 17:21:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15929 states, 15928 states have (on average 2.5727021597187343) internal successors, (40978), 15928 states have internal predecessors, (40978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15929 states to 15929 states and 40978 transitions. [2021-02-19 17:21:43,964 INFO L78 Accepts]: Start accepts. Automaton has 15929 states and 40978 transitions. Word has length 53 [2021-02-19 17:21:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:43,964 INFO L480 AbstractCegarLoop]: Abstraction has 15929 states and 40978 transitions. [2021-02-19 17:21:43,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-02-19 17:21:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 15929 states and 40978 transitions. [2021-02-19 17:21:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:43,973 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:43,973 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:44,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-02-19 17:21:44,173 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1808139798, now seen corresponding path program 213 times [2021-02-19 17:21:44,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:44,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633623586] [2021-02-19 17:21:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:44,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633623586] [2021-02-19 17:21:44,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761506539] [2021-02-19 17:21:44,282 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 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:44,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:21:44,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:44,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:44,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:44,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:44,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:21:44,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168871741] [2021-02-19 17:21:44,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:21:44,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:21:44,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:21:44,435 INFO L87 Difference]: Start difference. First operand 15929 states and 40978 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:21:44,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:44,800 INFO L93 Difference]: Finished difference Result 19428 states and 48803 transitions. [2021-02-19 17:21:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:21:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 53 [2021-02-19 17:21:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:44,826 INFO L225 Difference]: With dead ends: 19428 [2021-02-19 17:21:44,827 INFO L226 Difference]: Without dead ends: 19428 [2021-02-19 17:21:44,827 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:21:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19428 states. [2021-02-19 17:21:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19428 to 16290. [2021-02-19 17:21:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16290 states, 16289 states have (on average 2.5829087114003313) internal successors, (42073), 16289 states have internal predecessors, (42073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16290 states to 16290 states and 42073 transitions. [2021-02-19 17:21:45,095 INFO L78 Accepts]: Start accepts. Automaton has 16290 states and 42073 transitions. Word has length 53 [2021-02-19 17:21:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:45,095 INFO L480 AbstractCegarLoop]: Abstraction has 16290 states and 42073 transitions. [2021-02-19 17:21:45,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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) [2021-02-19 17:21:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 16290 states and 42073 transitions. [2021-02-19 17:21:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:45,104 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:45,104 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:45,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-02-19 17:21:45,310 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:45,310 INFO L82 PathProgramCache]: Analyzing trace with hash -933239799, now seen corresponding path program 117 times [2021-02-19 17:21:45,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:45,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087034321] [2021-02-19 17:21:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:45,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087034321] [2021-02-19 17:21:45,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918174169] [2021-02-19 17:21:45,430 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 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:45,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:21:45,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:45,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:45,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:21:45,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160467443] [2021-02-19 17:21:45,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:21:45,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:45,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:21:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:21:45,573 INFO L87 Difference]: Start difference. First operand 16290 states and 42073 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) [2021-02-19 17:21:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:46,329 INFO L93 Difference]: Finished difference Result 19020 states and 48119 transitions. [2021-02-19 17:21:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:21:46,330 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 53 [2021-02-19 17:21:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:46,355 INFO L225 Difference]: With dead ends: 19020 [2021-02-19 17:21:46,355 INFO L226 Difference]: Without dead ends: 19006 [2021-02-19 17:21:46,355 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:21:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19006 states. [2021-02-19 17:21:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19006 to 16312. [2021-02-19 17:21:46,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16312 states, 16311 states have (on average 2.583287352093679) internal successors, (42136), 16311 states have internal predecessors, (42136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16312 states to 16312 states and 42136 transitions. [2021-02-19 17:21:46,639 INFO L78 Accepts]: Start accepts. Automaton has 16312 states and 42136 transitions. Word has length 53 [2021-02-19 17:21:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:46,639 INFO L480 AbstractCegarLoop]: Abstraction has 16312 states and 42136 transitions. [2021-02-19 17:21:46,639 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) [2021-02-19 17:21:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 16312 states and 42136 transitions. [2021-02-19 17:21:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:46,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:46,648 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:46,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-02-19 17:21:46,848 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1110130743, now seen corresponding path program 214 times [2021-02-19 17:21:46,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:46,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797091149] [2021-02-19 17:21:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:46,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797091149] [2021-02-19 17:21:46,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994130303] [2021-02-19 17:21:46,981 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:47,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:47,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:47,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:47,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:47,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-02-19 17:21:47,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176728188] [2021-02-19 17:21:47,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:21:47,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:47,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:21:47,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:21:47,228 INFO L87 Difference]: Start difference. First operand 16312 states and 42136 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:47,912 INFO L93 Difference]: Finished difference Result 16369 states and 42228 transitions. [2021-02-19 17:21:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:21:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:47,935 INFO L225 Difference]: With dead ends: 16369 [2021-02-19 17:21:47,935 INFO L226 Difference]: Without dead ends: 16331 [2021-02-19 17:21:47,935 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:21:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-02-19 17:21:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 16303. [2021-02-19 17:21:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 2.5830572935836096) internal successors, (42109), 16302 states have internal predecessors, (42109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 42109 transitions. [2021-02-19 17:21:48,162 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 42109 transitions. Word has length 53 [2021-02-19 17:21:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:48,162 INFO L480 AbstractCegarLoop]: Abstraction has 16303 states and 42109 transitions. [2021-02-19 17:21:48,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 42109 transitions. [2021-02-19 17:21:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:48,171 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:48,171 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:48,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:48,372 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:48,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1855932620, now seen corresponding path program 215 times [2021-02-19 17:21:48,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:48,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97750815] [2021-02-19 17:21:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:48,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97750815] [2021-02-19 17:21:48,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714890065] [2021-02-19 17:21:48,466 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 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:48,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 17:21:48,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:48,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:48,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:48,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:48,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-02-19 17:21:48,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77266168] [2021-02-19 17:21:48,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:21:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:21:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:21:48,647 INFO L87 Difference]: Start difference. First operand 16303 states and 42109 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:49,043 INFO L93 Difference]: Finished difference Result 20064 states and 50446 transitions. [2021-02-19 17:21:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:21:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:49,066 INFO L225 Difference]: With dead ends: 20064 [2021-02-19 17:21:49,066 INFO L226 Difference]: Without dead ends: 20064 [2021-02-19 17:21:49,066 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:21:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20064 states. [2021-02-19 17:21:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20064 to 16702. [2021-02-19 17:21:49,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16702 states, 16701 states have (on average 2.5931381354409915) internal successors, (43308), 16701 states have internal predecessors, (43308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16702 states to 16702 states and 43308 transitions. [2021-02-19 17:21:49,297 INFO L78 Accepts]: Start accepts. Automaton has 16702 states and 43308 transitions. Word has length 53 [2021-02-19 17:21:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:49,297 INFO L480 AbstractCegarLoop]: Abstraction has 16702 states and 43308 transitions. [2021-02-19 17:21:49,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 16702 states and 43308 transitions. [2021-02-19 17:21:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:49,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:49,305 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:49,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-02-19 17:21:49,506 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:49,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1668199009, now seen corresponding path program 118 times [2021-02-19 17:21:49,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:49,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250919977] [2021-02-19 17:21:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:49,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250919977] [2021-02-19 17:21:49,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567161911] [2021-02-19 17:21:49,611 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 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:49,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:49,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 17:21:49,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:49,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:21:49,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 17:21:49,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:21:49,758 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-02-19 17:21:49,758 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:21:49,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:21:49,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-02-19 17:21:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:49,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:49,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-02-19 17:21:49,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141418556] [2021-02-19 17:21:49,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:21:49,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:49,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:21:49,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:21:49,771 INFO L87 Difference]: Start difference. First operand 16702 states and 43308 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:21:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:50,629 INFO L93 Difference]: Finished difference Result 20310 states and 51154 transitions. [2021-02-19 17:21:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:21:50,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 53 [2021-02-19 17:21:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:50,652 INFO L225 Difference]: With dead ends: 20310 [2021-02-19 17:21:50,652 INFO L226 Difference]: Without dead ends: 20248 [2021-02-19 17:21:50,652 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:21:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20248 states. [2021-02-19 17:21:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20248 to 17707. [2021-02-19 17:21:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17707 states, 17706 states have (on average 2.5786738958545126) internal successors, (45658), 17706 states have internal predecessors, (45658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17707 states to 17707 states and 45658 transitions. [2021-02-19 17:21:50,939 INFO L78 Accepts]: Start accepts. Automaton has 17707 states and 45658 transitions. Word has length 53 [2021-02-19 17:21:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:50,939 INFO L480 AbstractCegarLoop]: Abstraction has 17707 states and 45658 transitions. [2021-02-19 17:21:50,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:21:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 17707 states and 45658 transitions. [2021-02-19 17:21:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:50,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:50,948 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:51,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable777,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:51,149 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 34902625, now seen corresponding path program 216 times [2021-02-19 17:21:51,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:51,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245779141] [2021-02-19 17:21:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245779141] [2021-02-19 17:21:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519058220] [2021-02-19 17:21:51,255 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 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:51,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:21:51,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:51,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:51,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:51,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-02-19 17:21:51,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588266104] [2021-02-19 17:21:51,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:21:51,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:21:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:21:51,432 INFO L87 Difference]: Start difference. First operand 17707 states and 45658 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:51,907 INFO L93 Difference]: Finished difference Result 17780 states and 45766 transitions. [2021-02-19 17:21:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:21:51,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:51,927 INFO L225 Difference]: With dead ends: 17780 [2021-02-19 17:21:51,928 INFO L226 Difference]: Without dead ends: 17757 [2021-02-19 17:21:51,928 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:21:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17757 states. [2021-02-19 17:21:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17757 to 17698. [2021-02-19 17:21:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17698 states, 17697 states have (on average 2.5786856529355258) internal successors, (45635), 17697 states have internal predecessors, (45635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17698 states to 17698 states and 45635 transitions. [2021-02-19 17:21:52,139 INFO L78 Accepts]: Start accepts. Automaton has 17698 states and 45635 transitions. Word has length 53 [2021-02-19 17:21:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:52,139 INFO L480 AbstractCegarLoop]: Abstraction has 17698 states and 45635 transitions. [2021-02-19 17:21:52,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 17698 states and 45635 transitions. [2021-02-19 17:21:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:52,149 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:52,149 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:52,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:52,349 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1588490324, now seen corresponding path program 119 times [2021-02-19 17:21:52,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:52,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430083356] [2021-02-19 17:21:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:52,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430083356] [2021-02-19 17:21:52,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800313041] [2021-02-19 17:21:52,479 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 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:52,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:21:52,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:52,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:52,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:52,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-02-19 17:21:52,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139384286] [2021-02-19 17:21:52,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:21:52,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:21:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:21:52,717 INFO L87 Difference]: Start difference. First operand 17698 states and 45635 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:53,240 INFO L93 Difference]: Finished difference Result 19519 states and 49175 transitions. [2021-02-19 17:21:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:21:53,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:53,263 INFO L225 Difference]: With dead ends: 19519 [2021-02-19 17:21:53,264 INFO L226 Difference]: Without dead ends: 19497 [2021-02-19 17:21:53,264 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:21:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19497 states. [2021-02-19 17:21:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19497 to 17644. [2021-02-19 17:21:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17644 states, 17643 states have (on average 2.579833361673185) internal successors, (45516), 17643 states have internal predecessors, (45516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17644 states to 17644 states and 45516 transitions. [2021-02-19 17:21:53,526 INFO L78 Accepts]: Start accepts. Automaton has 17644 states and 45516 transitions. Word has length 53 [2021-02-19 17:21:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:53,526 INFO L480 AbstractCegarLoop]: Abstraction has 17644 states and 45516 transitions. [2021-02-19 17:21:53,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 17644 states and 45516 transitions. [2021-02-19 17:21:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:53,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:53,536 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:53,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable779 [2021-02-19 17:21:53,751 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:53,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1668467414, now seen corresponding path program 217 times [2021-02-19 17:21:53,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:53,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207715892] [2021-02-19 17:21:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:53,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207715892] [2021-02-19 17:21:53,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305643874] [2021-02-19 17:21:53,854 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 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:53,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:53,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:54,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:54,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:21:54,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317325812] [2021-02-19 17:21:54,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:21:54,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:54,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:21:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:21:54,032 INFO L87 Difference]: Start difference. First operand 17644 states and 45516 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:21:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:54,319 INFO L93 Difference]: Finished difference Result 22069 states and 55206 transitions. [2021-02-19 17:21:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:21:54,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 53 [2021-02-19 17:21:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:54,346 INFO L225 Difference]: With dead ends: 22069 [2021-02-19 17:21:54,346 INFO L226 Difference]: Without dead ends: 22069 [2021-02-19 17:21:54,347 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:21:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22069 states. [2021-02-19 17:21:54,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22069 to 18287. [2021-02-19 17:21:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 2.592201684348682) internal successors, (47401), 18286 states have internal predecessors, (47401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 47401 transitions. [2021-02-19 17:21:54,601 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 47401 transitions. Word has length 53 [2021-02-19 17:21:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:54,602 INFO L480 AbstractCegarLoop]: Abstraction has 18287 states and 47401 transitions. [2021-02-19 17:21:54,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:21:54,602 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 47401 transitions. [2021-02-19 17:21:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:54,611 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:54,611 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:54,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-02-19 17:21:54,812 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1430405897, now seen corresponding path program 120 times [2021-02-19 17:21:54,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:54,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598442599] [2021-02-19 17:21:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:54,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598442599] [2021-02-19 17:21:54,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389533421] [2021-02-19 17:21:54,919 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 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:54,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:21:54,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:54,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:55,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:55,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:21:55,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109232988] [2021-02-19 17:21:55,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:21:55,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:55,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:21:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:21:55,133 INFO L87 Difference]: Start difference. First operand 18287 states and 47401 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2021-02-19 17:21:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:55,731 INFO L93 Difference]: Finished difference Result 20912 states and 52894 transitions. [2021-02-19 17:21:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:21:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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 53 [2021-02-19 17:21:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:55,754 INFO L225 Difference]: With dead ends: 20912 [2021-02-19 17:21:55,754 INFO L226 Difference]: Without dead ends: 20869 [2021-02-19 17:21:55,755 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:21:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20869 states. [2021-02-19 17:21:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20869 to 18935. [2021-02-19 17:21:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18935 states, 18934 states have (on average 2.580014788211683) internal successors, (48850), 18934 states have internal predecessors, (48850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18935 states to 18935 states and 48850 transitions. [2021-02-19 17:21:56,006 INFO L78 Accepts]: Start accepts. Automaton has 18935 states and 48850 transitions. Word has length 53 [2021-02-19 17:21:56,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:56,007 INFO L480 AbstractCegarLoop]: Abstraction has 18935 states and 48850 transitions. [2021-02-19 17:21:56,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2021-02-19 17:21:56,007 INFO L276 IsEmpty]: Start isEmpty. Operand 18935 states and 48850 transitions. [2021-02-19 17:21:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:56,017 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:56,017 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:56,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-02-19 17:21:56,217 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:56,217 INFO L82 PathProgramCache]: Analyzing trace with hash -123290960, now seen corresponding path program 218 times [2021-02-19 17:21:56,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:56,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399585621] [2021-02-19 17:21:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399585621] [2021-02-19 17:21:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122382493] [2021-02-19 17:21:56,310 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 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:56,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:21:56,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:56,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:56,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:21:56,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355433928] [2021-02-19 17:21:56,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:21:56,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:56,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:21:56,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:21:56,463 INFO L87 Difference]: Start difference. First operand 18935 states and 48850 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:21:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:56,725 INFO L93 Difference]: Finished difference Result 22353 states and 55782 transitions. [2021-02-19 17:21:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:21:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 53 [2021-02-19 17:21:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:56,754 INFO L225 Difference]: With dead ends: 22353 [2021-02-19 17:21:56,754 INFO L226 Difference]: Without dead ends: 22350 [2021-02-19 17:21:56,754 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:21:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22350 states. [2021-02-19 17:21:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22350 to 18934. [2021-02-19 17:21:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18934 states, 18933 states have (on average 2.579781334178419) internal successors, (48843), 18933 states have internal predecessors, (48843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18934 states to 18934 states and 48843 transitions. [2021-02-19 17:21:57,038 INFO L78 Accepts]: Start accepts. Automaton has 18934 states and 48843 transitions. Word has length 53 [2021-02-19 17:21:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:57,038 INFO L480 AbstractCegarLoop]: Abstraction has 18934 states and 48843 transitions. [2021-02-19 17:21:57,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:21:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 18934 states and 48843 transitions. [2021-02-19 17:21:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:57,048 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:57,048 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:57,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-02-19 17:21:57,248 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:57,248 INFO L82 PathProgramCache]: Analyzing trace with hash 83771606, now seen corresponding path program 219 times [2021-02-19 17:21:57,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:57,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437520789] [2021-02-19 17:21:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:57,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437520789] [2021-02-19 17:21:57,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490435062] [2021-02-19 17:21:57,348 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 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:57,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:21:57,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:57,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:21:57,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:21:57,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:57,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:21:57,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128304918] [2021-02-19 17:21:57,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:21:57,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:21:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:21:57,502 INFO L87 Difference]: Start difference. First operand 18934 states and 48843 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:21:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:57,739 INFO L93 Difference]: Finished difference Result 22398 states and 56318 transitions. [2021-02-19 17:21:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:21:57,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 53 [2021-02-19 17:21:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:57,768 INFO L225 Difference]: With dead ends: 22398 [2021-02-19 17:21:57,768 INFO L226 Difference]: Without dead ends: 22386 [2021-02-19 17:21:57,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:21:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22386 states. [2021-02-19 17:21:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22386 to 18934. [2021-02-19 17:21:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18934 states, 18933 states have (on average 2.5794644271906195) internal successors, (48837), 18933 states have internal predecessors, (48837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18934 states to 18934 states and 48837 transitions. [2021-02-19 17:21:58,039 INFO L78 Accepts]: Start accepts. Automaton has 18934 states and 48837 transitions. Word has length 53 [2021-02-19 17:21:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:58,039 INFO L480 AbstractCegarLoop]: Abstraction has 18934 states and 48837 transitions. [2021-02-19 17:21:58,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-02-19 17:21:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 18934 states and 48837 transitions. [2021-02-19 17:21:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:58,050 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:58,050 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:58,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:58,252 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:58,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1364228407, now seen corresponding path program 220 times [2021-02-19 17:21:58,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:58,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122614451] [2021-02-19 17:21:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:58,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122614451] [2021-02-19 17:21:58,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695534636] [2021-02-19 17:21:58,359 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:58,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:58,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:21:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:58,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:58,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:21:58,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434814] [2021-02-19 17:21:58,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:21:58,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:58,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:21:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:21:58,507 INFO L87 Difference]: Start difference. First operand 18934 states and 48837 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:59,421 INFO L93 Difference]: Finished difference Result 20196 states and 51279 transitions. [2021-02-19 17:21:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:21:59,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:21:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:59,443 INFO L225 Difference]: With dead ends: 20196 [2021-02-19 17:21:59,444 INFO L226 Difference]: Without dead ends: 20055 [2021-02-19 17:21:59,444 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:21:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20055 states. [2021-02-19 17:21:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20055 to 18860. [2021-02-19 17:21:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18860 states, 18859 states have (on average 2.5767007794686885) internal successors, (48594), 18859 states have internal predecessors, (48594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18860 states to 18860 states and 48594 transitions. [2021-02-19 17:21:59,708 INFO L78 Accepts]: Start accepts. Automaton has 18860 states and 48594 transitions. Word has length 53 [2021-02-19 17:21:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:59,708 INFO L480 AbstractCegarLoop]: Abstraction has 18860 states and 48594 transitions. [2021-02-19 17:21:59,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 18860 states and 48594 transitions. [2021-02-19 17:21:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:21:59,719 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:59,719 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:59,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-02-19 17:21:59,920 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1696711856, now seen corresponding path program 221 times [2021-02-19 17:21:59,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:59,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728896234] [2021-02-19 17:21:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:00,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728896234] [2021-02-19 17:22:00,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448200094] [2021-02-19 17:22:00,012 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 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:00,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:22:00,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:22:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:00,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:00,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2021-02-19 17:22:00,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617054373] [2021-02-19 17:22:00,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:22:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:00,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:22:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:22:00,190 INFO L87 Difference]: Start difference. First operand 18860 states and 48594 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:00,541 INFO L93 Difference]: Finished difference Result 22503 states and 56431 transitions. [2021-02-19 17:22:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:22:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:22:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:00,570 INFO L225 Difference]: With dead ends: 22503 [2021-02-19 17:22:00,570 INFO L226 Difference]: Without dead ends: 22485 [2021-02-19 17:22:00,570 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:22:00,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22485 states. [2021-02-19 17:22:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22485 to 19058. [2021-02-19 17:22:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.581938395340295) internal successors, (49204), 19057 states have internal predecessors, (49204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49204 transitions. [2021-02-19 17:22:00,868 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49204 transitions. Word has length 53 [2021-02-19 17:22:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:00,868 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49204 transitions. [2021-02-19 17:22:00,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49204 transitions. [2021-02-19 17:22:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:00,878 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:00,878 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:01,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:01,079 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash 705591958, now seen corresponding path program 222 times [2021-02-19 17:22:01,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:01,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136393386] [2021-02-19 17:22:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136393386] [2021-02-19 17:22:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673747031] [2021-02-19 17:22:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:01,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:22:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:01,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:22:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:01,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:01,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:22:01,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338930516] [2021-02-19 17:22:01,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:22:01,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:01,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:22:01,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:01,333 INFO L87 Difference]: Start difference. First operand 19058 states and 49204 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) [2021-02-19 17:22:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:01,628 INFO L93 Difference]: Finished difference Result 22370 states and 56114 transitions. [2021-02-19 17:22:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:22:01,629 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 53 [2021-02-19 17:22:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:01,656 INFO L225 Difference]: With dead ends: 22370 [2021-02-19 17:22:01,656 INFO L226 Difference]: Without dead ends: 22343 [2021-02-19 17:22:01,656 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:22:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2021-02-19 17:22:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 19058. [2021-02-19 17:22:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.581780972870861) internal successors, (49201), 19057 states have internal predecessors, (49201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49201 transitions. [2021-02-19 17:22:01,944 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49201 transitions. Word has length 53 [2021-02-19 17:22:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:01,944 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49201 transitions. [2021-02-19 17:22:01,944 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) [2021-02-19 17:22:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49201 transitions. [2021-02-19 17:22:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:01,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:01,954 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:02,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-02-19 17:22:02,155 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:02,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096656, now seen corresponding path program 223 times [2021-02-19 17:22:02,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:02,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435677851] [2021-02-19 17:22:02,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:02,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435677851] [2021-02-19 17:22:02,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248778677] [2021-02-19 17:22:02,275 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 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:02,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:22:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:02,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:02,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:22:02,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537080923] [2021-02-19 17:22:02,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:22:02,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:02,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:22:02,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:22:02,420 INFO L87 Difference]: Start difference. First operand 19058 states and 49201 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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) [2021-02-19 17:22:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:02,738 INFO L93 Difference]: Finished difference Result 22478 states and 56307 transitions. [2021-02-19 17:22:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:22:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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 53 [2021-02-19 17:22:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:02,763 INFO L225 Difference]: With dead ends: 22478 [2021-02-19 17:22:02,763 INFO L226 Difference]: Without dead ends: 22442 [2021-02-19 17:22:02,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:22:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22442 states. [2021-02-19 17:22:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22442 to 19058. [2021-02-19 17:22:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.581623550401427) internal successors, (49198), 19057 states have internal predecessors, (49198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49198 transitions. [2021-02-19 17:22:03,082 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49198 transitions. Word has length 53 [2021-02-19 17:22:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:03,082 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49198 transitions. [2021-02-19 17:22:03,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 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) [2021-02-19 17:22:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49198 transitions. [2021-02-19 17:22:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:03,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:03,093 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:03,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:03,293 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash 855401558, now seen corresponding path program 224 times [2021-02-19 17:22:03,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:03,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250466887] [2021-02-19 17:22:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:03,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250466887] [2021-02-19 17:22:03,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008474499] [2021-02-19 17:22:03,457 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 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:03,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:03,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:03,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:22:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:03,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:03,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-02-19 17:22:03,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241822564] [2021-02-19 17:22:03,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:22:03,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:03,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:22:03,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:22:03,608 INFO L87 Difference]: Start difference. First operand 19058 states and 49198 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-02-19 17:22:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:03,956 INFO L93 Difference]: Finished difference Result 22655 states and 56627 transitions. [2021-02-19 17:22:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:22:03,957 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 53 [2021-02-19 17:22:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:03,986 INFO L225 Difference]: With dead ends: 22655 [2021-02-19 17:22:03,986 INFO L226 Difference]: Without dead ends: 22610 [2021-02-19 17:22:03,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:22:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22610 states. [2021-02-19 17:22:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22610 to 19058. [2021-02-19 17:22:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.5814661279319937) internal successors, (49195), 19057 states have internal predecessors, (49195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49195 transitions. [2021-02-19 17:22:04,287 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49195 transitions. Word has length 53 [2021-02-19 17:22:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:04,287 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49195 transitions. [2021-02-19 17:22:04,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2021-02-19 17:22:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49195 transitions. [2021-02-19 17:22:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:04,297 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:04,297 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:04,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:04,497 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1635323600, now seen corresponding path program 225 times [2021-02-19 17:22:04,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:04,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216942934] [2021-02-19 17:22:04,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216942934] [2021-02-19 17:22:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632972631] [2021-02-19 17:22:04,664 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 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:04,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:22:04,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:22:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:04,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:04,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-02-19 17:22:04,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255849184] [2021-02-19 17:22:04,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:22:04,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:04,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:22:04,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:22:04,815 INFO L87 Difference]: Start difference. First operand 19058 states and 49195 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-02-19 17:22:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:05,169 INFO L93 Difference]: Finished difference Result 22943 states and 57150 transitions. [2021-02-19 17:22:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:22:05,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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 53 [2021-02-19 17:22:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:05,198 INFO L225 Difference]: With dead ends: 22943 [2021-02-19 17:22:05,198 INFO L226 Difference]: Without dead ends: 22889 [2021-02-19 17:22:05,198 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:22:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22889 states. [2021-02-19 17:22:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22889 to 19058. [2021-02-19 17:22:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 19057 states have (on average 2.58130870546256) internal successors, (49192), 19057 states have internal predecessors, (49192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 49192 transitions. [2021-02-19 17:22:05,495 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 49192 transitions. Word has length 53 [2021-02-19 17:22:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:05,495 INFO L480 AbstractCegarLoop]: Abstraction has 19058 states and 49192 transitions. [2021-02-19 17:22:05,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 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) [2021-02-19 17:22:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 49192 transitions. [2021-02-19 17:22:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:05,504 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:05,504 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:05,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:05,705 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash -913888415, now seen corresponding path program 226 times [2021-02-19 17:22:05,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:05,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615479612] [2021-02-19 17:22:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:05,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615479612] [2021-02-19 17:22:05,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906199153] [2021-02-19 17:22:05,876 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 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:05,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:05,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 17:22:05,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:06,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 17:22:06,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-02-19 17:22:06,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:06,172 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-02-19 17:22:06,173 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:22:06,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:06,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-02-19 17:22:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:06,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:06,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-02-19 17:22:06,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147017646] [2021-02-19 17:22:06,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:22:06,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:22:06,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:22:06,188 INFO L87 Difference]: Start difference. First operand 19058 states and 49192 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:12,080 INFO L93 Difference]: Finished difference Result 40642 states and 96916 transitions. [2021-02-19 17:22:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2021-02-19 17:22:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:22:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:12,133 INFO L225 Difference]: With dead ends: 40642 [2021-02-19 17:22:12,133 INFO L226 Difference]: Without dead ends: 39470 [2021-02-19 17:22:12,136 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16412 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3047, Invalid=35959, Unknown=0, NotChecked=0, Total=39006 [2021-02-19 17:22:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39470 states. [2021-02-19 17:22:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39470 to 24061. [2021-02-19 17:22:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24061 states, 24060 states have (on average 2.5862011637572735) internal successors, (62224), 24060 states have internal predecessors, (62224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24061 states to 24061 states and 62224 transitions. [2021-02-19 17:22:12,689 INFO L78 Accepts]: Start accepts. Automaton has 24061 states and 62224 transitions. Word has length 53 [2021-02-19 17:22:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:12,689 INFO L480 AbstractCegarLoop]: Abstraction has 24061 states and 62224 transitions. [2021-02-19 17:22:12,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24061 states and 62224 transitions. [2021-02-19 17:22:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:12,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:12,700 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:12,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-02-19 17:22:12,900 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1151949932, now seen corresponding path program 121 times [2021-02-19 17:22:12,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:12,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350018888] [2021-02-19 17:22:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:12,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350018888] [2021-02-19 17:22:12,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790826864] [2021-02-19 17:22:12,997 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 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:13,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:13,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:13,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:13,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-02-19 17:22:13,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512415274] [2021-02-19 17:22:13,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:22:13,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:13,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:22:13,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:13,166 INFO L87 Difference]: Start difference. First operand 24061 states and 62224 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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) [2021-02-19 17:22:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:13,562 INFO L93 Difference]: Finished difference Result 26620 states and 67456 transitions. [2021-02-19 17:22:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:22:13,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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 53 [2021-02-19 17:22:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:13,599 INFO L225 Difference]: With dead ends: 26620 [2021-02-19 17:22:13,599 INFO L226 Difference]: Without dead ends: 26606 [2021-02-19 17:22:13,599 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:22:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26606 states. [2021-02-19 17:22:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26606 to 22975. [2021-02-19 17:22:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22975 states, 22974 states have (on average 2.5736049447201186) internal successors, (59126), 22974 states have internal predecessors, (59126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22975 states to 22975 states and 59126 transitions. [2021-02-19 17:22:13,966 INFO L78 Accepts]: Start accepts. Automaton has 22975 states and 59126 transitions. Word has length 53 [2021-02-19 17:22:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:13,967 INFO L480 AbstractCegarLoop]: Abstraction has 22975 states and 59126 transitions. [2021-02-19 17:22:13,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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) [2021-02-19 17:22:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 22975 states and 59126 transitions. [2021-02-19 17:22:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:13,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:13,977 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:14,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable821,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:14,178 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:14,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1773830342, now seen corresponding path program 122 times [2021-02-19 17:22:14,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:14,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503468759] [2021-02-19 17:22:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503468759] [2021-02-19 17:22:14,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141206294] [2021-02-19 17:22:14,266 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 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:14,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:22:14,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:14,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:14,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-02-19 17:22:14,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101336887] [2021-02-19 17:22:14,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:22:14,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:14,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:22:14,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:14,422 INFO L87 Difference]: Start difference. First operand 22975 states and 59126 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:14,983 INFO L93 Difference]: Finished difference Result 29857 states and 74280 transitions. [2021-02-19 17:22:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:22:14,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:22:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:15,026 INFO L225 Difference]: With dead ends: 29857 [2021-02-19 17:22:15,026 INFO L226 Difference]: Without dead ends: 29857 [2021-02-19 17:22:15,026 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:15,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29857 states. [2021-02-19 17:22:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29857 to 22992. [2021-02-19 17:22:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22992 states, 22991 states have (on average 2.5737897438127963) internal successors, (59174), 22991 states have internal predecessors, (59174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22992 states to 22992 states and 59174 transitions. [2021-02-19 17:22:15,411 INFO L78 Accepts]: Start accepts. Automaton has 22992 states and 59174 transitions. Word has length 53 [2021-02-19 17:22:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:15,411 INFO L480 AbstractCegarLoop]: Abstraction has 22992 states and 59174 transitions. [2021-02-19 17:22:15,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 22992 states and 59174 transitions. [2021-02-19 17:22:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:15,422 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:15,422 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:15,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:15,623 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:15,623 INFO L82 PathProgramCache]: Analyzing trace with hash 883564498, now seen corresponding path program 123 times [2021-02-19 17:22:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:15,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471306930] [2021-02-19 17:22:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:15,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471306930] [2021-02-19 17:22:15,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791528825] [2021-02-19 17:22:15,731 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 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:15,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:22:15,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:15,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:15,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-02-19 17:22:15,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064148485] [2021-02-19 17:22:15,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:22:15,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:15,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:22:15,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:22:15,917 INFO L87 Difference]: Start difference. First operand 22992 states and 59174 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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) [2021-02-19 17:22:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:16,578 INFO L93 Difference]: Finished difference Result 26754 states and 66944 transitions. [2021-02-19 17:22:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:22:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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 53 [2021-02-19 17:22:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:16,616 INFO L225 Difference]: With dead ends: 26754 [2021-02-19 17:22:16,617 INFO L226 Difference]: Without dead ends: 26754 [2021-02-19 17:22:16,617 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:22:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26754 states. [2021-02-19 17:22:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26754 to 22375. [2021-02-19 17:22:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22375 states, 22374 states have (on average 2.587333512112273) internal successors, (57889), 22374 states have internal predecessors, (57889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22375 states to 22375 states and 57889 transitions. [2021-02-19 17:22:16,989 INFO L78 Accepts]: Start accepts. Automaton has 22375 states and 57889 transitions. Word has length 53 [2021-02-19 17:22:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:16,989 INFO L480 AbstractCegarLoop]: Abstraction has 22375 states and 57889 transitions. [2021-02-19 17:22:16,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 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) [2021-02-19 17:22:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 22375 states and 57889 transitions. [2021-02-19 17:22:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 17:22:16,999 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:16,999 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:17,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:17,199 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1321467414, now seen corresponding path program 227 times [2021-02-19 17:22:17,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:17,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078918649] [2021-02-19 17:22:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:17,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078918649] [2021-02-19 17:22:17,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892432296] [2021-02-19 17:22:17,395 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 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:17,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:22:17,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:17,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:22:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:17,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:17,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 19 [2021-02-19 17:22:17,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380875668] [2021-02-19 17:22:17,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:22:17,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:17,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:22:17,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:22:17,591 INFO L87 Difference]: Start difference. First operand 22375 states and 57889 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:18,109 INFO L93 Difference]: Finished difference Result 25271 states and 64037 transitions. [2021-02-19 17:22:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:22:18,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 17:22:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:18,146 INFO L225 Difference]: With dead ends: 25271 [2021-02-19 17:22:18,146 INFO L226 Difference]: Without dead ends: 25206 [2021-02-19 17:22:18,147 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:22:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25206 states. [2021-02-19 17:22:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25206 to 22384. [2021-02-19 17:22:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22384 states, 22383 states have (on average 2.5869186436134566) internal successors, (57903), 22383 states have internal predecessors, (57903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22384 states to 22384 states and 57903 transitions. [2021-02-19 17:22:18,491 INFO L78 Accepts]: Start accepts. Automaton has 22384 states and 57903 transitions. Word has length 53 [2021-02-19 17:22:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:18,491 INFO L480 AbstractCegarLoop]: Abstraction has 22384 states and 57903 transitions. [2021-02-19 17:22:18,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22384 states and 57903 transitions. [2021-02-19 17:22:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:18,502 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:18,502 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:18,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:18,702 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash 402955095, now seen corresponding path program 228 times [2021-02-19 17:22:18,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:18,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930264892] [2021-02-19 17:22:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:18,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930264892] [2021-02-19 17:22:18,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903119451] [2021-02-19 17:22:18,811 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 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:18,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 17:22:18,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:22:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:19,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:19,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2021-02-19 17:22:19,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640774928] [2021-02-19 17:22:19,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 17:22:19,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 17:22:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:22:19,381 INFO L87 Difference]: Start difference. First operand 22384 states and 57903 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:21,014 INFO L93 Difference]: Finished difference Result 27178 states and 68058 transitions. [2021-02-19 17:22:21,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 17:22:21,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-02-19 17:22:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:21,050 INFO L225 Difference]: With dead ends: 27178 [2021-02-19 17:22:21,051 INFO L226 Difference]: Without dead ends: 27125 [2021-02-19 17:22:21,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:22:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27125 states. [2021-02-19 17:22:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27125 to 24344. [2021-02-19 17:22:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24344 states, 24343 states have (on average 2.569527174136302) internal successors, (62550), 24343 states have internal predecessors, (62550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24344 states to 24344 states and 62550 transitions. [2021-02-19 17:22:21,443 INFO L78 Accepts]: Start accepts. Automaton has 24344 states and 62550 transitions. Word has length 56 [2021-02-19 17:22:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:21,443 INFO L480 AbstractCegarLoop]: Abstraction has 24344 states and 62550 transitions. [2021-02-19 17:22:21,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24344 states and 62550 transitions. [2021-02-19 17:22:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:21,457 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:21,457 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:21,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable837 [2021-02-19 17:22:21,657 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1678028905, now seen corresponding path program 229 times [2021-02-19 17:22:21,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:21,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147111916] [2021-02-19 17:22:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:22:21,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147111916] [2021-02-19 17:22:21,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059336784] [2021-02-19 17:22:21,741 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 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:22:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:22:21,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:21,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:22:21,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317709674] [2021-02-19 17:22:21,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:22:21,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:21,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:22:21,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:21,883 INFO L87 Difference]: Start difference. First operand 24344 states and 62550 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2021-02-19 17:22:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:22,408 INFO L93 Difference]: Finished difference Result 26354 states and 66735 transitions. [2021-02-19 17:22:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:22:22,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 56 [2021-02-19 17:22:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:22,445 INFO L225 Difference]: With dead ends: 26354 [2021-02-19 17:22:22,445 INFO L226 Difference]: Without dead ends: 26282 [2021-02-19 17:22:22,445 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26282 states. [2021-02-19 17:22:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26282 to 24485. [2021-02-19 17:22:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24485 states, 24484 states have (on average 2.566533246201601) internal successors, (62839), 24484 states have internal predecessors, (62839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24485 states to 24485 states and 62839 transitions. [2021-02-19 17:22:22,789 INFO L78 Accepts]: Start accepts. Automaton has 24485 states and 62839 transitions. Word has length 56 [2021-02-19 17:22:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:22,789 INFO L480 AbstractCegarLoop]: Abstraction has 24485 states and 62839 transitions. [2021-02-19 17:22:22,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2021-02-19 17:22:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24485 states and 62839 transitions. [2021-02-19 17:22:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:22,803 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:22,803 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:23,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-02-19 17:22:23,004 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:23,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:23,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1737333948, now seen corresponding path program 7 times [2021-02-19 17:22:23,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:23,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541704431] [2021-02-19 17:22:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 29 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:23,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541704431] [2021-02-19 17:22:23,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917677211] [2021-02-19 17:22:23,224 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 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:23,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:22:23,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:23,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:23,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-02-19 17:22:23,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226058282] [2021-02-19 17:22:23,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:22:23,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:22:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:22:23,638 INFO L87 Difference]: Start difference. First operand 24485 states and 62839 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:24,782 INFO L93 Difference]: Finished difference Result 24589 states and 62987 transitions. [2021-02-19 17:22:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:22:24,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-02-19 17:22:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:24,812 INFO L225 Difference]: With dead ends: 24589 [2021-02-19 17:22:24,812 INFO L226 Difference]: Without dead ends: 24423 [2021-02-19 17:22:24,812 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:22:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24423 states. [2021-02-19 17:22:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24423 to 24395. [2021-02-19 17:22:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24395 states, 24394 states have (on average 2.567721570878085) internal successors, (62637), 24394 states have internal predecessors, (62637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24395 states to 24395 states and 62637 transitions. [2021-02-19 17:22:25,151 INFO L78 Accepts]: Start accepts. Automaton has 24395 states and 62637 transitions. Word has length 56 [2021-02-19 17:22:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:25,151 INFO L480 AbstractCegarLoop]: Abstraction has 24395 states and 62637 transitions. [2021-02-19 17:22:25,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 24395 states and 62637 transitions. [2021-02-19 17:22:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:25,165 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:25,165 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:25,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-02-19 17:22:25,366 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash 173585137, now seen corresponding path program 230 times [2021-02-19 17:22:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:25,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291210518] [2021-02-19 17:22:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:22:25,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291210518] [2021-02-19 17:22:25,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97510050] [2021-02-19 17:22:25,565 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 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:25,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:25,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 46 proven. 107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:22:25,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:25,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-02-19 17:22:25,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420478572] [2021-02-19 17:22:25,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:22:25,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:22:25,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:25,885 INFO L87 Difference]: Start difference. First operand 24395 states and 62637 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:27,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:27,346 INFO L93 Difference]: Finished difference Result 32253 states and 79396 transitions. [2021-02-19 17:22:27,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 17:22:27,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-02-19 17:22:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:27,390 INFO L225 Difference]: With dead ends: 32253 [2021-02-19 17:22:27,390 INFO L226 Difference]: Without dead ends: 32152 [2021-02-19 17:22:27,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:22:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32152 states. [2021-02-19 17:22:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32152 to 24633. [2021-02-19 17:22:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24633 states, 24632 states have (on average 2.5644689834361807) internal successors, (63168), 24632 states have internal predecessors, (63168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24633 states to 24633 states and 63168 transitions. [2021-02-19 17:22:27,807 INFO L78 Accepts]: Start accepts. Automaton has 24633 states and 63168 transitions. Word has length 56 [2021-02-19 17:22:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:27,807 INFO L480 AbstractCegarLoop]: Abstraction has 24633 states and 63168 transitions. [2021-02-19 17:22:27,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24633 states and 63168 transitions. [2021-02-19 17:22:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:27,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:27,822 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:28,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-02-19 17:22:28,022 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1342527831, now seen corresponding path program 231 times [2021-02-19 17:22:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:28,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224950290] [2021-02-19 17:22:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:22:28,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224950290] [2021-02-19 17:22:28,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548982097] [2021-02-19 17:22:28,116 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 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:28,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-02-19 17:22:28,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:22:28,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:28,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-02-19 17:22:28,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29756016] [2021-02-19 17:22:28,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:22:28,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:22:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:28,458 INFO L87 Difference]: Start difference. First operand 24633 states and 63168 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:29,902 INFO L93 Difference]: Finished difference Result 32833 states and 80582 transitions. [2021-02-19 17:22:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 17:22:29,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-02-19 17:22:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:29,942 INFO L225 Difference]: With dead ends: 32833 [2021-02-19 17:22:29,942 INFO L226 Difference]: Without dead ends: 32760 [2021-02-19 17:22:29,943 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:22:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32760 states. [2021-02-19 17:22:30,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32760 to 24693. [2021-02-19 17:22:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24693 states, 24692 states have (on average 2.562894864733517) internal successors, (63283), 24692 states have internal predecessors, (63283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24693 states to 24693 states and 63283 transitions. [2021-02-19 17:22:30,435 INFO L78 Accepts]: Start accepts. Automaton has 24693 states and 63283 transitions. Word has length 56 [2021-02-19 17:22:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:30,435 INFO L480 AbstractCegarLoop]: Abstraction has 24693 states and 63283 transitions. [2021-02-19 17:22:30,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 24693 states and 63283 transitions. [2021-02-19 17:22:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:30,449 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:30,449 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:30,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:30,649 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1719488817, now seen corresponding path program 232 times [2021-02-19 17:22:30,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:30,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018599188] [2021-02-19 17:22:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:22:30,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018599188] [2021-02-19 17:22:30,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488735086] [2021-02-19 17:22:30,733 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 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:30,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:30,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:30,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:22:30,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:22:30,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:30,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:22:30,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129936913] [2021-02-19 17:22:30,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:22:30,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:22:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:30,874 INFO L87 Difference]: Start difference. First operand 24693 states and 63283 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2021-02-19 17:22:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:31,455 INFO L93 Difference]: Finished difference Result 25814 states and 65561 transitions. [2021-02-19 17:22:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:22:31,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 56 [2021-02-19 17:22:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:31,492 INFO L225 Difference]: With dead ends: 25814 [2021-02-19 17:22:31,492 INFO L226 Difference]: Without dead ends: 25773 [2021-02-19 17:22:31,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25773 states. [2021-02-19 17:22:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25773 to 24731. [2021-02-19 17:22:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24731 states, 24730 states have (on average 2.5619086130206226) internal successors, (63356), 24730 states have internal predecessors, (63356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24731 states to 24731 states and 63356 transitions. [2021-02-19 17:22:31,859 INFO L78 Accepts]: Start accepts. Automaton has 24731 states and 63356 transitions. Word has length 56 [2021-02-19 17:22:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:31,859 INFO L480 AbstractCegarLoop]: Abstraction has 24731 states and 63356 transitions. [2021-02-19 17:22:31,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2021-02-19 17:22:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 24731 states and 63356 transitions. [2021-02-19 17:22:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:31,873 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:31,873 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:32,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-02-19 17:22:32,074 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:32,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1774337905, now seen corresponding path program 233 times [2021-02-19 17:22:32,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:32,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937083245] [2021-02-19 17:22:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:22:32,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937083245] [2021-02-19 17:22:32,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488231520] [2021-02-19 17:22:32,171 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 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:32,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-02-19 17:22:32,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:32,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:22:32,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-02-19 17:22:32,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:32,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 17:22:32,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727116909] [2021-02-19 17:22:32,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:22:32,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:32,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:22:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:32,327 INFO L87 Difference]: Start difference. First operand 24731 states and 63356 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2021-02-19 17:22:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:32,844 INFO L93 Difference]: Finished difference Result 26018 states and 65962 transitions. [2021-02-19 17:22:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:22:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 56 [2021-02-19 17:22:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:32,880 INFO L225 Difference]: With dead ends: 26018 [2021-02-19 17:22:32,880 INFO L226 Difference]: Without dead ends: 25979 [2021-02-19 17:22:32,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25979 states. [2021-02-19 17:22:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25979 to 24894. [2021-02-19 17:22:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24894 states, 24893 states have (on average 2.5581890491302777) internal successors, (63681), 24893 states have internal predecessors, (63681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24894 states to 24894 states and 63681 transitions. [2021-02-19 17:22:33,238 INFO L78 Accepts]: Start accepts. Automaton has 24894 states and 63681 transitions. Word has length 56 [2021-02-19 17:22:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:33,239 INFO L480 AbstractCegarLoop]: Abstraction has 24894 states and 63681 transitions. [2021-02-19 17:22:33,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2021-02-19 17:22:33,239 INFO L276 IsEmpty]: Start isEmpty. Operand 24894 states and 63681 transitions. [2021-02-19 17:22:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:33,252 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:33,252 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:33,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:33,453 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash -776860694, now seen corresponding path program 8 times [2021-02-19 17:22:33,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:33,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884171999] [2021-02-19 17:22:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884171999] [2021-02-19 17:22:33,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506557673] [2021-02-19 17:22:33,628 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 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:33,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:33,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 17:22:33,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 119 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:34,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:34,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-02-19 17:22:34,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36030575] [2021-02-19 17:22:34,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:22:34,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:22:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:22:34,028 INFO L87 Difference]: Start difference. First operand 24894 states and 63681 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:35,056 INFO L93 Difference]: Finished difference Result 25034 states and 63907 transitions. [2021-02-19 17:22:35,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:22:35,057 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-02-19 17:22:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:35,088 INFO L225 Difference]: With dead ends: 25034 [2021-02-19 17:22:35,089 INFO L226 Difference]: Without dead ends: 24892 [2021-02-19 17:22:35,089 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:22:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24892 states. [2021-02-19 17:22:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24892 to 24864. [2021-02-19 17:22:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24864 states, 24863 states have (on average 2.5579777178940595) internal successors, (63599), 24863 states have internal predecessors, (63599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24864 states to 24864 states and 63599 transitions. [2021-02-19 17:22:35,440 INFO L78 Accepts]: Start accepts. Automaton has 24864 states and 63599 transitions. Word has length 56 [2021-02-19 17:22:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:35,440 INFO L480 AbstractCegarLoop]: Abstraction has 24864 states and 63599 transitions. [2021-02-19 17:22:35,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24864 states and 63599 transitions. [2021-02-19 17:22:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 17:22:35,453 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:35,453 INFO L506 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:35,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:35,654 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash -929908094, now seen corresponding path program 9 times [2021-02-19 17:22:35,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:35,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898201060] [2021-02-19 17:22:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:35,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898201060] [2021-02-19 17:22:35,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564597314] [2021-02-19 17:22:35,841 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 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:35,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:22:35,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:22:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 27 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:36,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:36,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-02-19 17:22:36,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683195789] [2021-02-19 17:22:36,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:22:36,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:22:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:22:36,257 INFO L87 Difference]: Start difference. First operand 24864 states and 63599 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:37,499 INFO L93 Difference]: Finished difference Result 25092 states and 63979 transitions. [2021-02-19 17:22:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:22:37,500 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-02-19 17:22:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:37,532 INFO L225 Difference]: With dead ends: 25092 [2021-02-19 17:22:37,532 INFO L226 Difference]: Without dead ends: 24915 [2021-02-19 17:22:37,533 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:22:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24915 states. [2021-02-19 17:22:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24915 to 24796. [2021-02-19 17:22:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24796 states, 24795 states have (on average 2.5587820125025207) internal successors, (63445), 24795 states have internal predecessors, (63445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24796 states to 24796 states and 63445 transitions. [2021-02-19 17:22:37,875 INFO L78 Accepts]: Start accepts. Automaton has 24796 states and 63445 transitions. Word has length 56 [2021-02-19 17:22:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:37,875 INFO L480 AbstractCegarLoop]: Abstraction has 24796 states and 63445 transitions. [2021-02-19 17:22:37,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 24796 states and 63445 transitions. [2021-02-19 17:22:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:37,891 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:37,891 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:38,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-02-19 17:22:38,091 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash -848422572, now seen corresponding path program 124 times [2021-02-19 17:22:38,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:38,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636460808] [2021-02-19 17:22:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636460808] [2021-02-19 17:22:38,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571691803] [2021-02-19 17:22:38,307 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 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:38,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:38,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:38,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:22:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:38,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:38,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-02-19 17:22:38,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926302265] [2021-02-19 17:22:38,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:22:38,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:38,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:22:38,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:38,486 INFO L87 Difference]: Start difference. First operand 24796 states and 63445 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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) [2021-02-19 17:22:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:40,196 INFO L93 Difference]: Finished difference Result 31414 states and 78165 transitions. [2021-02-19 17:22:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:22:40,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 59 [2021-02-19 17:22:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:40,230 INFO L225 Difference]: With dead ends: 31414 [2021-02-19 17:22:40,230 INFO L226 Difference]: Without dead ends: 31125 [2021-02-19 17:22:40,230 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:22:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31125 states. [2021-02-19 17:22:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31125 to 23378. [2021-02-19 17:22:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23378 states, 23377 states have (on average 2.5538349659922144) internal successors, (59701), 23377 states have internal predecessors, (59701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23378 states to 23378 states and 59701 transitions. [2021-02-19 17:22:40,572 INFO L78 Accepts]: Start accepts. Automaton has 23378 states and 59701 transitions. Word has length 59 [2021-02-19 17:22:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:40,572 INFO L480 AbstractCegarLoop]: Abstraction has 23378 states and 59701 transitions. [2021-02-19 17:22:40,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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) [2021-02-19 17:22:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 23378 states and 59701 transitions. [2021-02-19 17:22:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:40,587 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:40,587 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:40,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:40,787 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:40,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:40,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1136637499, now seen corresponding path program 234 times [2021-02-19 17:22:40,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:40,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225130087] [2021-02-19 17:22:40,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:40,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225130087] [2021-02-19 17:22:40,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148650532] [2021-02-19 17:22:40,899 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 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:40,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:22:40,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:40,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:22:40,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:41,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:41,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:22:41,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842985520] [2021-02-19 17:22:41,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:22:41,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:41,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:22:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:41,061 INFO L87 Difference]: Start difference. First operand 23378 states and 59701 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:41,674 INFO L93 Difference]: Finished difference Result 25495 states and 64090 transitions. [2021-02-19 17:22:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:22:41,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:41,708 INFO L225 Difference]: With dead ends: 25495 [2021-02-19 17:22:41,708 INFO L226 Difference]: Without dead ends: 25447 [2021-02-19 17:22:41,709 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:22:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-02-19 17:22:42,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 23528. [2021-02-19 17:22:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23528 states, 23527 states have (on average 2.556934585795044) internal successors, (60157), 23527 states have internal predecessors, (60157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23528 states to 23528 states and 60157 transitions. [2021-02-19 17:22:42,067 INFO L78 Accepts]: Start accepts. Automaton has 23528 states and 60157 transitions. Word has length 59 [2021-02-19 17:22:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:42,068 INFO L480 AbstractCegarLoop]: Abstraction has 23528 states and 60157 transitions. [2021-02-19 17:22:42,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 23528 states and 60157 transitions. [2021-02-19 17:22:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:42,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:42,084 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:42,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:42,284 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:42,284 INFO L82 PathProgramCache]: Analyzing trace with hash -832619244, now seen corresponding path program 235 times [2021-02-19 17:22:42,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:42,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665001968] [2021-02-19 17:22:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 159 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:42,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665001968] [2021-02-19 17:22:42,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052149261] [2021-02-19 17:22:42,565 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 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:42,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:22:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:43,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:43,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-02-19 17:22:43,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858085685] [2021-02-19 17:22:43,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:22:43,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:43,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:22:43,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:22:43,053 INFO L87 Difference]: Start difference. First operand 23528 states and 60157 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:44,898 INFO L93 Difference]: Finished difference Result 24119 states and 61217 transitions. [2021-02-19 17:22:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:22:44,899 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:44,929 INFO L225 Difference]: With dead ends: 24119 [2021-02-19 17:22:44,929 INFO L226 Difference]: Without dead ends: 23811 [2021-02-19 17:22:44,929 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:22:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23811 states. [2021-02-19 17:22:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23811 to 23436. [2021-02-19 17:22:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23436 states, 23435 states have (on average 2.5522509067633883) internal successors, (59812), 23435 states have internal predecessors, (59812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23436 states to 23436 states and 59812 transitions. [2021-02-19 17:22:45,282 INFO L78 Accepts]: Start accepts. Automaton has 23436 states and 59812 transitions. Word has length 59 [2021-02-19 17:22:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:45,282 INFO L480 AbstractCegarLoop]: Abstraction has 23436 states and 59812 transitions. [2021-02-19 17:22:45,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 23436 states and 59812 transitions. [2021-02-19 17:22:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:45,299 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:45,299 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:45,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-02-19 17:22:45,500 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1852033568, now seen corresponding path program 236 times [2021-02-19 17:22:45,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:45,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168747669] [2021-02-19 17:22:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:45,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168747669] [2021-02-19 17:22:45,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376639481] [2021-02-19 17:22:45,657 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:45,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:45,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:22:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:45,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:45,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:22:45,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134756619] [2021-02-19 17:22:45,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:22:45,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:45,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:22:45,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:45,828 INFO L87 Difference]: Start difference. First operand 23436 states and 59812 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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) [2021-02-19 17:22:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:46,578 INFO L93 Difference]: Finished difference Result 24213 states and 61314 transitions. [2021-02-19 17:22:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:22:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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 59 [2021-02-19 17:22:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:46,607 INFO L225 Difference]: With dead ends: 24213 [2021-02-19 17:22:46,607 INFO L226 Difference]: Without dead ends: 24159 [2021-02-19 17:22:46,608 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24159 states. [2021-02-19 17:22:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24159 to 23420. [2021-02-19 17:22:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23420 states, 23419 states have (on average 2.5535676160382597) internal successors, (59802), 23419 states have internal predecessors, (59802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23420 states to 23420 states and 59802 transitions. [2021-02-19 17:22:46,934 INFO L78 Accepts]: Start accepts. Automaton has 23420 states and 59802 transitions. Word has length 59 [2021-02-19 17:22:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:46,934 INFO L480 AbstractCegarLoop]: Abstraction has 23420 states and 59802 transitions. [2021-02-19 17:22:46,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 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) [2021-02-19 17:22:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 23420 states and 59802 transitions. [2021-02-19 17:22:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:46,947 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:46,947 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:47,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable852 [2021-02-19 17:22:47,148 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash -267823321, now seen corresponding path program 125 times [2021-02-19 17:22:47,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:47,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353442531] [2021-02-19 17:22:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 102 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:47,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353442531] [2021-02-19 17:22:47,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844277652] [2021-02-19 17:22:47,261 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 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:47,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 17:22:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:47,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:22:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:47,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:47,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-02-19 17:22:47,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668828094] [2021-02-19 17:22:47,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:22:47,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:47,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:22:47,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:22:47,478 INFO L87 Difference]: Start difference. First operand 23420 states and 59802 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:47,829 INFO L93 Difference]: Finished difference Result 32163 states and 79228 transitions. [2021-02-19 17:22:47,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:22:47,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:47,868 INFO L225 Difference]: With dead ends: 32163 [2021-02-19 17:22:47,868 INFO L226 Difference]: Without dead ends: 32163 [2021-02-19 17:22:47,868 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:22:47,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32163 states. [2021-02-19 17:22:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32163 to 25200. [2021-02-19 17:22:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25200 states, 25199 states have (on average 2.578713441009564) internal successors, (64981), 25199 states have internal predecessors, (64981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25200 states to 25200 states and 64981 transitions. [2021-02-19 17:22:48,291 INFO L78 Accepts]: Start accepts. Automaton has 25200 states and 64981 transitions. Word has length 59 [2021-02-19 17:22:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:48,292 INFO L480 AbstractCegarLoop]: Abstraction has 25200 states and 64981 transitions. [2021-02-19 17:22:48,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25200 states and 64981 transitions. [2021-02-19 17:22:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:48,309 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:48,309 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:48,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable853 [2021-02-19 17:22:48,509 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:48,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:48,509 INFO L82 PathProgramCache]: Analyzing trace with hash -801688697, now seen corresponding path program 237 times [2021-02-19 17:22:48,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:48,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934414388] [2021-02-19 17:22:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:48,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934414388] [2021-02-19 17:22:48,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784592289] [2021-02-19 17:22:48,620 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 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:48,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:22:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:22:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:48,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:48,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:22:48,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840424977] [2021-02-19 17:22:48,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:22:48,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:22:48,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:48,868 INFO L87 Difference]: Start difference. First operand 25200 states and 64981 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:49,206 INFO L93 Difference]: Finished difference Result 26418 states and 67563 transitions. [2021-02-19 17:22:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:22:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:49,241 INFO L225 Difference]: With dead ends: 26418 [2021-02-19 17:22:49,241 INFO L226 Difference]: Without dead ends: 26415 [2021-02-19 17:22:49,241 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-02-19 17:22:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 25200. [2021-02-19 17:22:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25200 states, 25199 states have (on average 2.578634072780666) internal successors, (64979), 25199 states have internal predecessors, (64979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25200 states to 25200 states and 64979 transitions. [2021-02-19 17:22:49,613 INFO L78 Accepts]: Start accepts. Automaton has 25200 states and 64979 transitions. Word has length 59 [2021-02-19 17:22:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:49,613 INFO L480 AbstractCegarLoop]: Abstraction has 25200 states and 64979 transitions. [2021-02-19 17:22:49,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 25200 states and 64979 transitions. [2021-02-19 17:22:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:49,628 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:49,628 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:49,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable854,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:49,828 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:49,829 INFO L82 PathProgramCache]: Analyzing trace with hash 925621524, now seen corresponding path program 126 times [2021-02-19 17:22:49,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:49,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684466741] [2021-02-19 17:22:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:49,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684466741] [2021-02-19 17:22:49,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65646218] [2021-02-19 17:22:49,975 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 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:50,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-02-19 17:22:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:22:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:50,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:50,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:22:50,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778001390] [2021-02-19 17:22:50,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:22:50,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:50,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:22:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:50,163 INFO L87 Difference]: Start difference. First operand 25200 states and 64979 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:51,020 INFO L93 Difference]: Finished difference Result 27878 states and 70606 transitions. [2021-02-19 17:22:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:22:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:51,061 INFO L225 Difference]: With dead ends: 27878 [2021-02-19 17:22:51,061 INFO L226 Difference]: Without dead ends: 27819 [2021-02-19 17:22:51,062 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27819 states. [2021-02-19 17:22:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27819 to 25729. [2021-02-19 17:22:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25729 states, 25728 states have (on average 2.575870646766169) internal successors, (66272), 25728 states have internal predecessors, (66272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25729 states to 25729 states and 66272 transitions. [2021-02-19 17:22:51,456 INFO L78 Accepts]: Start accepts. Automaton has 25729 states and 66272 transitions. Word has length 59 [2021-02-19 17:22:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:51,456 INFO L480 AbstractCegarLoop]: Abstraction has 25729 states and 66272 transitions. [2021-02-19 17:22:51,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 25729 states and 66272 transitions. [2021-02-19 17:22:51,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:51,472 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:51,472 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:51,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable857 [2021-02-19 17:22:51,673 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:51,673 INFO L82 PathProgramCache]: Analyzing trace with hash -628075333, now seen corresponding path program 238 times [2021-02-19 17:22:51,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:51,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454654258] [2021-02-19 17:22:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:22:51,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454654258] [2021-02-19 17:22:51,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118670618] [2021-02-19 17:22:51,781 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 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:51,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:22:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:22:51,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:51,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:22:51,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585770996] [2021-02-19 17:22:51,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:22:51,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:51,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:22:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:22:51,981 INFO L87 Difference]: Start difference. First operand 25729 states and 66272 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:52,338 INFO L93 Difference]: Finished difference Result 27827 states and 70472 transitions. [2021-02-19 17:22:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:22:52,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:52,375 INFO L225 Difference]: With dead ends: 27827 [2021-02-19 17:22:52,375 INFO L226 Difference]: Without dead ends: 27824 [2021-02-19 17:22:52,375 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27824 states. [2021-02-19 17:22:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27824 to 25697. [2021-02-19 17:22:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25697 states, 25696 states have (on average 2.5746030510585305) internal successors, (66157), 25696 states have internal predecessors, (66157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25697 states to 25697 states and 66157 transitions. [2021-02-19 17:22:52,797 INFO L78 Accepts]: Start accepts. Automaton has 25697 states and 66157 transitions. Word has length 59 [2021-02-19 17:22:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:52,797 INFO L480 AbstractCegarLoop]: Abstraction has 25697 states and 66157 transitions. [2021-02-19 17:22:52,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 25697 states and 66157 transitions. [2021-02-19 17:22:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:52,812 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:52,813 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:53,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable858,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:53,018 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash -421012767, now seen corresponding path program 239 times [2021-02-19 17:22:53,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:53,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244965687] [2021-02-19 17:22:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 79 proven. 95 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:22:53,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244965687] [2021-02-19 17:22:53,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923589839] [2021-02-19 17:22:53,130 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 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:53,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:22:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:53,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:22:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 83 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:53,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:53,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-02-19 17:22:53,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68820186] [2021-02-19 17:22:53,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:22:53,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:22:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:53,352 INFO L87 Difference]: Start difference. First operand 25697 states and 66157 transitions. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:53,852 INFO L93 Difference]: Finished difference Result 28184 states and 71177 transitions. [2021-02-19 17:22:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:22:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:53,890 INFO L225 Difference]: With dead ends: 28184 [2021-02-19 17:22:53,890 INFO L226 Difference]: Without dead ends: 28166 [2021-02-19 17:22:53,890 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:22:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28166 states. [2021-02-19 17:22:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28166 to 25649. [2021-02-19 17:22:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25649 states, 25648 states have (on average 2.5672956955708046) internal successors, (65846), 25648 states have internal predecessors, (65846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:54,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25649 states to 25649 states and 65846 transitions. [2021-02-19 17:22:54,286 INFO L78 Accepts]: Start accepts. Automaton has 25649 states and 65846 transitions. Word has length 59 [2021-02-19 17:22:54,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:54,286 INFO L480 AbstractCegarLoop]: Abstraction has 25649 states and 65846 transitions. [2021-02-19 17:22:54,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 25649 states and 65846 transitions. [2021-02-19 17:22:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:54,301 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:54,301 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:54,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-02-19 17:22:54,502 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1869012780, now seen corresponding path program 240 times [2021-02-19 17:22:54,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:54,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444821258] [2021-02-19 17:22:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444821258] [2021-02-19 17:22:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291089514] [2021-02-19 17:22:54,637 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 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:54,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-02-19 17:22:54,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:22:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:54,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:54,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:22:54,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933622770] [2021-02-19 17:22:54,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:22:54,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:22:54,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:54,862 INFO L87 Difference]: Start difference. First operand 25649 states and 65846 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:56,042 INFO L93 Difference]: Finished difference Result 26741 states and 67887 transitions. [2021-02-19 17:22:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:22:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:56,076 INFO L225 Difference]: With dead ends: 26741 [2021-02-19 17:22:56,076 INFO L226 Difference]: Without dead ends: 26685 [2021-02-19 17:22:56,076 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26685 states. [2021-02-19 17:22:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26685 to 25676. [2021-02-19 17:22:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25676 states, 25675 states have (on average 2.5661148977604675) internal successors, (65885), 25675 states have internal predecessors, (65885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:56,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25676 states to 25676 states and 65885 transitions. [2021-02-19 17:22:56,550 INFO L78 Accepts]: Start accepts. Automaton has 25676 states and 65885 transitions. Word has length 59 [2021-02-19 17:22:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:56,550 INFO L480 AbstractCegarLoop]: Abstraction has 25676 states and 65885 transitions. [2021-02-19 17:22:56,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 25676 states and 65885 transitions. [2021-02-19 17:22:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:56,565 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:56,565 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:56,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable863 [2021-02-19 17:22:56,766 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1812418336, now seen corresponding path program 241 times [2021-02-19 17:22:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:56,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780659289] [2021-02-19 17:22:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:22:56,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780659289] [2021-02-19 17:22:56,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607588828] [2021-02-19 17:22:56,898 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 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:22:56,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:22:57,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:57,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:22:57,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703756738] [2021-02-19 17:22:57,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:22:57,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:57,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:22:57,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:57,059 INFO L87 Difference]: Start difference. First operand 25676 states and 65885 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:58,030 INFO L93 Difference]: Finished difference Result 27106 states and 68721 transitions. [2021-02-19 17:22:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:22:58,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:58,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:58,063 INFO L225 Difference]: With dead ends: 27106 [2021-02-19 17:22:58,063 INFO L226 Difference]: Without dead ends: 27065 [2021-02-19 17:22:58,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:22:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27065 states. [2021-02-19 17:22:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27065 to 25371. [2021-02-19 17:22:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25371 states, 25370 states have (on average 2.567441860465116) internal successors, (65136), 25370 states have internal predecessors, (65136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25371 states to 25371 states and 65136 transitions. [2021-02-19 17:22:58,439 INFO L78 Accepts]: Start accepts. Automaton has 25371 states and 65136 transitions. Word has length 59 [2021-02-19 17:22:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:58,439 INFO L480 AbstractCegarLoop]: Abstraction has 25371 states and 65136 transitions. [2021-02-19 17:22:58,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 25371 states and 65136 transitions. [2021-02-19 17:22:58,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:22:58,455 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:58,455 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:58,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable864,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:58,660 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash -340631626, now seen corresponding path program 242 times [2021-02-19 17:22:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:58,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610735091] [2021-02-19 17:22:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:58,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610735091] [2021-02-19 17:22:58,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636800427] [2021-02-19 17:22:58,798 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 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:58,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:58,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:22:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:58,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:58,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:22:58,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272508442] [2021-02-19 17:22:58,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:22:58,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:58,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:22:58,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:58,964 INFO L87 Difference]: Start difference. First operand 25371 states and 65136 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:59,968 INFO L93 Difference]: Finished difference Result 27600 states and 69679 transitions. [2021-02-19 17:22:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:22:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:22:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:00,005 INFO L225 Difference]: With dead ends: 27600 [2021-02-19 17:23:00,005 INFO L226 Difference]: Without dead ends: 27588 [2021-02-19 17:23:00,005 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27588 states. [2021-02-19 17:23:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27588 to 25418. [2021-02-19 17:23:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25418 states, 25417 states have (on average 2.5673761655584846) internal successors, (65255), 25417 states have internal predecessors, (65255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25418 states to 25418 states and 65255 transitions. [2021-02-19 17:23:00,368 INFO L78 Accepts]: Start accepts. Automaton has 25418 states and 65255 transitions. Word has length 59 [2021-02-19 17:23:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:00,369 INFO L480 AbstractCegarLoop]: Abstraction has 25418 states and 65255 transitions. [2021-02-19 17:23:00,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 25418 states and 65255 transitions. [2021-02-19 17:23:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:00,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:00,384 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:00,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-02-19 17:23:00,585 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash -578693143, now seen corresponding path program 127 times [2021-02-19 17:23:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:00,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715309295] [2021-02-19 17:23:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:00,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715309295] [2021-02-19 17:23:00,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520867105] [2021-02-19 17:23:00,695 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 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:00,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:00,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:23:00,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130449401] [2021-02-19 17:23:00,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:00,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:00,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:00,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:00,968 INFO L87 Difference]: Start difference. First operand 25418 states and 65255 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:01,311 INFO L93 Difference]: Finished difference Result 30955 states and 76257 transitions. [2021-02-19 17:23:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:01,356 INFO L225 Difference]: With dead ends: 30955 [2021-02-19 17:23:01,356 INFO L226 Difference]: Without dead ends: 30947 [2021-02-19 17:23:01,356 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30947 states. [2021-02-19 17:23:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30947 to 25630. [2021-02-19 17:23:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25630 states, 25629 states have (on average 2.5715790705841037) internal successors, (65907), 25629 states have internal predecessors, (65907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25630 states to 25630 states and 65907 transitions. [2021-02-19 17:23:01,809 INFO L78 Accepts]: Start accepts. Automaton has 25630 states and 65907 transitions. Word has length 59 [2021-02-19 17:23:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:01,809 INFO L480 AbstractCegarLoop]: Abstraction has 25630 states and 65907 transitions. [2021-02-19 17:23:01,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25630 states and 65907 transitions. [2021-02-19 17:23:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:01,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:01,826 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:02,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable866,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:02,042 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:02,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1200573553, now seen corresponding path program 128 times [2021-02-19 17:23:02,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:02,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997354844] [2021-02-19 17:23:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:02,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997354844] [2021-02-19 17:23:02,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986564359] [2021-02-19 17:23:02,151 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 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:02,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:02,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:02,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:02,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:02,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:23:02,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835168888] [2021-02-19 17:23:02,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:02,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:02,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:02,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:02,364 INFO L87 Difference]: Start difference. First operand 25630 states and 65907 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:02,792 INFO L93 Difference]: Finished difference Result 34289 states and 84113 transitions. [2021-02-19 17:23:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:02,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:02,841 INFO L225 Difference]: With dead ends: 34289 [2021-02-19 17:23:02,841 INFO L226 Difference]: Without dead ends: 34289 [2021-02-19 17:23:02,842 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34289 states. [2021-02-19 17:23:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34289 to 25636. [2021-02-19 17:23:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25636 states, 25635 states have (on average 2.5714842988102204) internal successors, (65920), 25635 states have internal predecessors, (65920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25636 states to 25636 states and 65920 transitions. [2021-02-19 17:23:03,276 INFO L78 Accepts]: Start accepts. Automaton has 25636 states and 65920 transitions. Word has length 59 [2021-02-19 17:23:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:03,276 INFO L480 AbstractCegarLoop]: Abstraction has 25636 states and 65920 transitions. [2021-02-19 17:23:03,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 25636 states and 65920 transitions. [2021-02-19 17:23:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:03,290 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:03,290 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:03,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable868 [2021-02-19 17:23:03,491 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:03,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1456821287, now seen corresponding path program 129 times [2021-02-19 17:23:03,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:03,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122493555] [2021-02-19 17:23:03,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122493555] [2021-02-19 17:23:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872028918] [2021-02-19 17:23:03,619 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 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:03,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 17:23:03,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:03,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:03,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:03,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:03,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:23:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729432410] [2021-02-19 17:23:03,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:03,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:03,821 INFO L87 Difference]: Start difference. First operand 25636 states and 65920 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:04,217 INFO L93 Difference]: Finished difference Result 31966 states and 78726 transitions. [2021-02-19 17:23:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:04,256 INFO L225 Difference]: With dead ends: 31966 [2021-02-19 17:23:04,256 INFO L226 Difference]: Without dead ends: 31966 [2021-02-19 17:23:04,256 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31966 states. [2021-02-19 17:23:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31966 to 25301. [2021-02-19 17:23:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25301 states, 25300 states have (on average 2.5650592885375496) internal successors, (64896), 25300 states have internal predecessors, (64896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25301 states to 25301 states and 64896 transitions. [2021-02-19 17:23:04,705 INFO L78 Accepts]: Start accepts. Automaton has 25301 states and 64896 transitions. Word has length 59 [2021-02-19 17:23:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:04,706 INFO L480 AbstractCegarLoop]: Abstraction has 25301 states and 64896 transitions. [2021-02-19 17:23:04,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 25301 states and 64896 transitions. [2021-02-19 17:23:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:04,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:04,721 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:04,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable869,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:04,922 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1191927483, now seen corresponding path program 243 times [2021-02-19 17:23:04,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:04,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711944399] [2021-02-19 17:23:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:05,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711944399] [2021-02-19 17:23:05,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584135766] [2021-02-19 17:23:05,034 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 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:05,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:23:05,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:05,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:05,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:05,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:05,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:23:05,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127111311] [2021-02-19 17:23:05,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:05,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:05,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:05,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:05,213 INFO L87 Difference]: Start difference. First operand 25301 states and 64896 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:05,677 INFO L93 Difference]: Finished difference Result 26818 states and 67820 transitions. [2021-02-19 17:23:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:05,713 INFO L225 Difference]: With dead ends: 26818 [2021-02-19 17:23:05,713 INFO L226 Difference]: Without dead ends: 26800 [2021-02-19 17:23:05,713 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26800 states. [2021-02-19 17:23:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26800 to 25301. [2021-02-19 17:23:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25301 states, 25300 states have (on average 2.564584980237154) internal successors, (64884), 25300 states have internal predecessors, (64884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25301 states to 25301 states and 64884 transitions. [2021-02-19 17:23:06,084 INFO L78 Accepts]: Start accepts. Automaton has 25301 states and 64884 transitions. Word has length 59 [2021-02-19 17:23:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:06,084 INFO L480 AbstractCegarLoop]: Abstraction has 25301 states and 64884 transitions. [2021-02-19 17:23:06,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 25301 states and 64884 transitions. [2021-02-19 17:23:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:06,099 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:06,099 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:06,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-02-19 17:23:06,300 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:06,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2094564218, now seen corresponding path program 130 times [2021-02-19 17:23:06,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:06,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14657444] [2021-02-19 17:23:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:06,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14657444] [2021-02-19 17:23:06,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133903393] [2021-02-19 17:23:06,452 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 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:06,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:06,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:06,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:06,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:06,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260195701] [2021-02-19 17:23:06,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:06,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:06,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:06,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:06,647 INFO L87 Difference]: Start difference. First operand 25301 states and 64884 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:07,529 INFO L93 Difference]: Finished difference Result 27885 states and 70202 transitions. [2021-02-19 17:23:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:07,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:07,565 INFO L225 Difference]: With dead ends: 27885 [2021-02-19 17:23:07,565 INFO L226 Difference]: Without dead ends: 27836 [2021-02-19 17:23:07,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27836 states. [2021-02-19 17:23:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27836 to 25566. [2021-02-19 17:23:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25566 states, 25565 states have (on average 2.5637394875806767) internal successors, (65542), 25565 states have internal predecessors, (65542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25566 states to 25566 states and 65542 transitions. [2021-02-19 17:23:08,070 INFO L78 Accepts]: Start accepts. Automaton has 25566 states and 65542 transitions. Word has length 59 [2021-02-19 17:23:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:08,070 INFO L480 AbstractCegarLoop]: Abstraction has 25566 states and 65542 transitions. [2021-02-19 17:23:08,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 25566 states and 65542 transitions. [2021-02-19 17:23:08,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:08,085 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:08,085 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:08,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:08,286 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash -700070086, now seen corresponding path program 244 times [2021-02-19 17:23:08,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:08,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268985534] [2021-02-19 17:23:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:08,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268985534] [2021-02-19 17:23:08,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533313798] [2021-02-19 17:23:08,438 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 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:08,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:08,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:08,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:23:08,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166233556] [2021-02-19 17:23:08,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:08,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:08,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:08,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:08,665 INFO L87 Difference]: Start difference. First operand 25566 states and 65542 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:09,885 INFO L93 Difference]: Finished difference Result 26742 states and 67731 transitions. [2021-02-19 17:23:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:09,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:09,921 INFO L225 Difference]: With dead ends: 26742 [2021-02-19 17:23:09,921 INFO L226 Difference]: Without dead ends: 26674 [2021-02-19 17:23:09,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26674 states. [2021-02-19 17:23:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26674 to 25620. [2021-02-19 17:23:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25620 states, 25619 states have (on average 2.5615363597330107) internal successors, (65624), 25619 states have internal predecessors, (65624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25620 states to 25620 states and 65624 transitions. [2021-02-19 17:23:10,290 INFO L78 Accepts]: Start accepts. Automaton has 25620 states and 65624 transitions. Word has length 59 [2021-02-19 17:23:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:10,290 INFO L480 AbstractCegarLoop]: Abstraction has 25620 states and 65624 transitions. [2021-02-19 17:23:10,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 25620 states and 65624 transitions. [2021-02-19 17:23:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:10,307 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:10,307 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:10,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-02-19 17:23:10,507 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1313606266, now seen corresponding path program 245 times [2021-02-19 17:23:10,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:10,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671542887] [2021-02-19 17:23:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:10,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671542887] [2021-02-19 17:23:10,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963440268] [2021-02-19 17:23:10,663 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 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:10,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-02-19 17:23:10,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:10,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:10,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:10,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:10,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440656381] [2021-02-19 17:23:10,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:10,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:10,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:10,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:10,846 INFO L87 Difference]: Start difference. First operand 25620 states and 65624 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:11,735 INFO L93 Difference]: Finished difference Result 27296 states and 68946 transitions. [2021-02-19 17:23:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:11,775 INFO L225 Difference]: With dead ends: 27296 [2021-02-19 17:23:11,775 INFO L226 Difference]: Without dead ends: 27248 [2021-02-19 17:23:11,775 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27248 states. [2021-02-19 17:23:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27248 to 25311. [2021-02-19 17:23:12,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25311 states, 25310 states have (on average 2.563097589885421) internal successors, (64872), 25310 states have internal predecessors, (64872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25311 states to 25311 states and 64872 transitions. [2021-02-19 17:23:12,160 INFO L78 Accepts]: Start accepts. Automaton has 25311 states and 64872 transitions. Word has length 59 [2021-02-19 17:23:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:12,160 INFO L480 AbstractCegarLoop]: Abstraction has 25311 states and 64872 transitions. [2021-02-19 17:23:12,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 25311 states and 64872 transitions. [2021-02-19 17:23:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:12,176 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:12,176 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:12,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable876,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:12,376 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1470905753, now seen corresponding path program 131 times [2021-02-19 17:23:12,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:12,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405815574] [2021-02-19 17:23:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:12,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405815574] [2021-02-19 17:23:12,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082812077] [2021-02-19 17:23:12,479 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 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:12,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:23:12,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:12,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:12,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-02-19 17:23:12,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188115263] [2021-02-19 17:23:12,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:12,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:12,811 INFO L87 Difference]: Start difference. First operand 25311 states and 64872 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:13,206 INFO L93 Difference]: Finished difference Result 30589 states and 75406 transitions. [2021-02-19 17:23:13,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:13,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:13,244 INFO L225 Difference]: With dead ends: 30589 [2021-02-19 17:23:13,244 INFO L226 Difference]: Without dead ends: 30569 [2021-02-19 17:23:13,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30569 states. [2021-02-19 17:23:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30569 to 25626. [2021-02-19 17:23:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25626 states, 25625 states have (on average 2.5681951219512196) internal successors, (65810), 25625 states have internal predecessors, (65810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25626 states to 25626 states and 65810 transitions. [2021-02-19 17:23:13,633 INFO L78 Accepts]: Start accepts. Automaton has 25626 states and 65810 transitions. Word has length 59 [2021-02-19 17:23:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:13,633 INFO L480 AbstractCegarLoop]: Abstraction has 25626 states and 65810 transitions. [2021-02-19 17:23:13,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 25626 states and 65810 transitions. [2021-02-19 17:23:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:13,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:13,648 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:13,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-02-19 17:23:13,848 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1333003527, now seen corresponding path program 246 times [2021-02-19 17:23:13,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:13,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720410583] [2021-02-19 17:23:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:13,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720410583] [2021-02-19 17:23:13,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207765175] [2021-02-19 17:23:13,961 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 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:13,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:23:13,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:14,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:14,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:23:14,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934246362] [2021-02-19 17:23:14,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:14,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:14,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:14,129 INFO L87 Difference]: Start difference. First operand 25626 states and 65810 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:14,487 INFO L93 Difference]: Finished difference Result 28172 states and 70782 transitions. [2021-02-19 17:23:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:14,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:14,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:14,522 INFO L225 Difference]: With dead ends: 28172 [2021-02-19 17:23:14,522 INFO L226 Difference]: Without dead ends: 28154 [2021-02-19 17:23:14,522 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:14,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28154 states. [2021-02-19 17:23:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28154 to 25706. [2021-02-19 17:23:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25706 states, 25705 states have (on average 2.565998832911885) internal successors, (65959), 25705 states have internal predecessors, (65959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25706 states to 25706 states and 65959 transitions. [2021-02-19 17:23:14,890 INFO L78 Accepts]: Start accepts. Automaton has 25706 states and 65959 transitions. Word has length 59 [2021-02-19 17:23:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:14,890 INFO L480 AbstractCegarLoop]: Abstraction has 25706 states and 65959 transitions. [2021-02-19 17:23:14,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,891 INFO L276 IsEmpty]: Start isEmpty. Operand 25706 states and 65959 transitions. [2021-02-19 17:23:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:14,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:14,906 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:15,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:15,107 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:15,107 INFO L82 PathProgramCache]: Analyzing trace with hash 828311068, now seen corresponding path program 247 times [2021-02-19 17:23:15,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:15,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201650427] [2021-02-19 17:23:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:15,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201650427] [2021-02-19 17:23:15,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264132128] [2021-02-19 17:23:15,264 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 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:15,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:15,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:15,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:23:15,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466381777] [2021-02-19 17:23:15,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:15,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:15,449 INFO L87 Difference]: Start difference. First operand 25706 states and 65959 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:23:16,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:16,525 INFO L93 Difference]: Finished difference Result 29139 states and 73215 transitions. [2021-02-19 17:23:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:23:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 59 [2021-02-19 17:23:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:16,559 INFO L225 Difference]: With dead ends: 29139 [2021-02-19 17:23:16,560 INFO L226 Difference]: Without dead ends: 29097 [2021-02-19 17:23:16,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:23:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29097 states. [2021-02-19 17:23:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29097 to 25771. [2021-02-19 17:23:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25771 states, 25770 states have (on average 2.566472642607683) internal successors, (66138), 25770 states have internal predecessors, (66138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25771 states to 25771 states and 66138 transitions. [2021-02-19 17:23:16,966 INFO L78 Accepts]: Start accepts. Automaton has 25771 states and 66138 transitions. Word has length 59 [2021-02-19 17:23:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:16,966 INFO L480 AbstractCegarLoop]: Abstraction has 25771 states and 66138 transitions. [2021-02-19 17:23:16,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:23:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25771 states and 66138 transitions. [2021-02-19 17:23:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:16,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:16,982 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:17,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-02-19 17:23:17,183 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1934097119, now seen corresponding path program 248 times [2021-02-19 17:23:17,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:17,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947187521] [2021-02-19 17:23:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:17,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947187521] [2021-02-19 17:23:17,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130245719] [2021-02-19 17:23:17,311 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 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:17,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:17,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:17,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:17,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:17,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:23:17,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313853052] [2021-02-19 17:23:17,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:17,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:17,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:17,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:17,510 INFO L87 Difference]: Start difference. First operand 25771 states and 66138 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:17,845 INFO L93 Difference]: Finished difference Result 28231 states and 70881 transitions. [2021-02-19 17:23:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:17,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:17,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:17,884 INFO L225 Difference]: With dead ends: 28231 [2021-02-19 17:23:17,884 INFO L226 Difference]: Without dead ends: 28207 [2021-02-19 17:23:17,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28207 states. [2021-02-19 17:23:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28207 to 25414. [2021-02-19 17:23:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25414 states, 25413 states have (on average 2.5624286782355488) internal successors, (65119), 25413 states have internal predecessors, (65119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25414 states to 25414 states and 65119 transitions. [2021-02-19 17:23:18,276 INFO L78 Accepts]: Start accepts. Automaton has 25414 states and 65119 transitions. Word has length 59 [2021-02-19 17:23:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:18,276 INFO L480 AbstractCegarLoop]: Abstraction has 25414 states and 65119 transitions. [2021-02-19 17:23:18,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 25414 states and 65119 transitions. [2021-02-19 17:23:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:18,294 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:18,294 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:18,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-02-19 17:23:18,494 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash 983147602, now seen corresponding path program 249 times [2021-02-19 17:23:18,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:18,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780740947] [2021-02-19 17:23:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780740947] [2021-02-19 17:23:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725323389] [2021-02-19 17:23:18,644 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 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:18,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 17:23:18,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:18,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:18,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:23:18,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740552473] [2021-02-19 17:23:18,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:18,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:18,815 INFO L87 Difference]: Start difference. First operand 25414 states and 65119 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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) [2021-02-19 17:23:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:19,893 INFO L93 Difference]: Finished difference Result 29307 states and 73281 transitions. [2021-02-19 17:23:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:23:19,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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 59 [2021-02-19 17:23:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:19,931 INFO L225 Difference]: With dead ends: 29307 [2021-02-19 17:23:19,931 INFO L226 Difference]: Without dead ends: 29253 [2021-02-19 17:23:19,931 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:23:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29253 states. [2021-02-19 17:23:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29253 to 25378. [2021-02-19 17:23:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25378 states, 25377 states have (on average 2.5608621980533552) internal successors, (64987), 25377 states have internal predecessors, (64987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25378 states to 25378 states and 64987 transitions. [2021-02-19 17:23:20,403 INFO L78 Accepts]: Start accepts. Automaton has 25378 states and 64987 transitions. Word has length 59 [2021-02-19 17:23:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:20,403 INFO L480 AbstractCegarLoop]: Abstraction has 25378 states and 64987 transitions. [2021-02-19 17:23:20,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 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) [2021-02-19 17:23:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 25378 states and 64987 transitions. [2021-02-19 17:23:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:20,419 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:20,419 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:20,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-02-19 17:23:20,619 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:20,620 INFO L82 PathProgramCache]: Analyzing trace with hash 123205675, now seen corresponding path program 132 times [2021-02-19 17:23:20,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:20,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118970134] [2021-02-19 17:23:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:20,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118970134] [2021-02-19 17:23:20,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403284710] [2021-02-19 17:23:20,710 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 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:20,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-02-19 17:23:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:20,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:20,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:23:20,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147697301] [2021-02-19 17:23:20,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:20,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:20,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:20,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:20,939 INFO L87 Difference]: Start difference. First operand 25378 states and 64987 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:21,424 INFO L93 Difference]: Finished difference Result 36162 states and 88542 transitions. [2021-02-19 17:23:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:23:21,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:21,476 INFO L225 Difference]: With dead ends: 36162 [2021-02-19 17:23:21,476 INFO L226 Difference]: Without dead ends: 36162 [2021-02-19 17:23:21,476 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36162 states. [2021-02-19 17:23:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36162 to 25496. [2021-02-19 17:23:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25496 states, 25495 states have (on average 2.5630123553637967) internal successors, (65344), 25495 states have internal predecessors, (65344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25496 states to 25496 states and 65344 transitions. [2021-02-19 17:23:21,961 INFO L78 Accepts]: Start accepts. Automaton has 25496 states and 65344 transitions. Word has length 59 [2021-02-19 17:23:21,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:21,961 INFO L480 AbstractCegarLoop]: Abstraction has 25496 states and 65344 transitions. [2021-02-19 17:23:21,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:21,961 INFO L276 IsEmpty]: Start isEmpty. Operand 25496 states and 65344 transitions. [2021-02-19 17:23:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:21,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:21,977 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:22,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable889,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:22,192 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1514366781, now seen corresponding path program 133 times [2021-02-19 17:23:22,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:22,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74179064] [2021-02-19 17:23:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:22,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74179064] [2021-02-19 17:23:22,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453138993] [2021-02-19 17:23:22,330 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 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:22,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:22,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:23:22,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390137018] [2021-02-19 17:23:22,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:22,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:22,508 INFO L87 Difference]: Start difference. First operand 25496 states and 65344 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:22,936 INFO L93 Difference]: Finished difference Result 35758 states and 87548 transitions. [2021-02-19 17:23:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:22,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:22,983 INFO L225 Difference]: With dead ends: 35758 [2021-02-19 17:23:22,983 INFO L226 Difference]: Without dead ends: 35758 [2021-02-19 17:23:22,983 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35758 states. [2021-02-19 17:23:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35758 to 25518. [2021-02-19 17:23:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25518 states, 25517 states have (on average 2.563310734020457) internal successors, (65408), 25517 states have internal predecessors, (65408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25518 states to 25518 states and 65408 transitions. [2021-02-19 17:23:23,419 INFO L78 Accepts]: Start accepts. Automaton has 25518 states and 65408 transitions. Word has length 59 [2021-02-19 17:23:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:23,419 INFO L480 AbstractCegarLoop]: Abstraction has 25518 states and 65408 transitions. [2021-02-19 17:23:23,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 25518 states and 65408 transitions. [2021-02-19 17:23:23,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:23,434 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:23,434 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:23,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable890 [2021-02-19 17:23:23,635 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1090605351, now seen corresponding path program 134 times [2021-02-19 17:23:23,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:23,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16434602] [2021-02-19 17:23:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:23,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16434602] [2021-02-19 17:23:23,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743826786] [2021-02-19 17:23:23,798 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 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:23,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:23,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:23,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:24,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:24,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-02-19 17:23:24,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965206517] [2021-02-19 17:23:24,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:24,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:24,043 INFO L87 Difference]: Start difference. First operand 25518 states and 65408 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:24,632 INFO L93 Difference]: Finished difference Result 31600 states and 77846 transitions. [2021-02-19 17:23:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:23:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:24,673 INFO L225 Difference]: With dead ends: 31600 [2021-02-19 17:23:24,674 INFO L226 Difference]: Without dead ends: 31600 [2021-02-19 17:23:24,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31600 states. [2021-02-19 17:23:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31600 to 25209. [2021-02-19 17:23:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25209 states, 25208 states have (on average 2.558870199936528) internal successors, (64504), 25208 states have internal predecessors, (64504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25209 states to 25209 states and 64504 transitions. [2021-02-19 17:23:25,083 INFO L78 Accepts]: Start accepts. Automaton has 25209 states and 64504 transitions. Word has length 59 [2021-02-19 17:23:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:25,083 INFO L480 AbstractCegarLoop]: Abstraction has 25209 states and 64504 transitions. [2021-02-19 17:23:25,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 25209 states and 64504 transitions. [2021-02-19 17:23:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:25,099 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:25,099 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:25,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:25,299 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1369750279, now seen corresponding path program 250 times [2021-02-19 17:23:25,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:25,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311742959] [2021-02-19 17:23:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:25,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311742959] [2021-02-19 17:23:25,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368945136] [2021-02-19 17:23:25,430 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 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:25,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:25,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:25,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:25,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:25,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:23:25,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672317838] [2021-02-19 17:23:25,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:25,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:25,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:25,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:25,604 INFO L87 Difference]: Start difference. First operand 25209 states and 64504 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:26,007 INFO L93 Difference]: Finished difference Result 27418 states and 68804 transitions. [2021-02-19 17:23:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:26,043 INFO L225 Difference]: With dead ends: 27418 [2021-02-19 17:23:26,044 INFO L226 Difference]: Without dead ends: 27391 [2021-02-19 17:23:26,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27391 states. [2021-02-19 17:23:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27391 to 25209. [2021-02-19 17:23:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25209 states, 25208 states have (on average 2.558513170422088) internal successors, (64495), 25208 states have internal predecessors, (64495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25209 states to 25209 states and 64495 transitions. [2021-02-19 17:23:26,420 INFO L78 Accepts]: Start accepts. Automaton has 25209 states and 64495 transitions. Word has length 59 [2021-02-19 17:23:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:26,420 INFO L480 AbstractCegarLoop]: Abstraction has 25209 states and 64495 transitions. [2021-02-19 17:23:26,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 25209 states and 64495 transitions. [2021-02-19 17:23:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:26,435 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:26,435 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:26,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-02-19 17:23:26,635 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1823442092, now seen corresponding path program 135 times [2021-02-19 17:23:26,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:26,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652005409] [2021-02-19 17:23:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:26,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652005409] [2021-02-19 17:23:26,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002193743] [2021-02-19 17:23:26,804 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 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:26,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-02-19 17:23:26,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:26,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:26,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:26,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:26,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747258898] [2021-02-19 17:23:26,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:26,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:26,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:26,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:26,992 INFO L87 Difference]: Start difference. First operand 25209 states and 64495 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:27,882 INFO L93 Difference]: Finished difference Result 27577 states and 69376 transitions. [2021-02-19 17:23:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:27,919 INFO L225 Difference]: With dead ends: 27577 [2021-02-19 17:23:27,919 INFO L226 Difference]: Without dead ends: 27534 [2021-02-19 17:23:27,919 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:27,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27534 states. [2021-02-19 17:23:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27534 to 25380. [2021-02-19 17:23:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25380 states, 25379 states have (on average 2.5582568265101067) internal successors, (64926), 25379 states have internal predecessors, (64926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25380 states to 25380 states and 64926 transitions. [2021-02-19 17:23:28,362 INFO L78 Accepts]: Start accepts. Automaton has 25380 states and 64926 transitions. Word has length 59 [2021-02-19 17:23:28,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:28,362 INFO L480 AbstractCegarLoop]: Abstraction has 25380 states and 64926 transitions. [2021-02-19 17:23:28,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:28,362 INFO L276 IsEmpty]: Start isEmpty. Operand 25380 states and 64926 transitions. [2021-02-19 17:23:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:28,378 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:28,378 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:28,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:28,579 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:28,579 INFO L82 PathProgramCache]: Analyzing trace with hash -323109100, now seen corresponding path program 251 times [2021-02-19 17:23:28,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:28,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117121459] [2021-02-19 17:23:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:28,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117121459] [2021-02-19 17:23:28,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176829220] [2021-02-19 17:23:28,708 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 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:28,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-02-19 17:23:28,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:28,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:28,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:23:28,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718776514] [2021-02-19 17:23:28,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:28,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:28,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:28,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:28,899 INFO L87 Difference]: Start difference. First operand 25380 states and 64926 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:30,103 INFO L93 Difference]: Finished difference Result 26542 states and 67117 transitions. [2021-02-19 17:23:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:30,144 INFO L225 Difference]: With dead ends: 26542 [2021-02-19 17:23:30,144 INFO L226 Difference]: Without dead ends: 26466 [2021-02-19 17:23:30,144 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:30,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26466 states. [2021-02-19 17:23:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26466 to 25473. [2021-02-19 17:23:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25473 states, 25472 states have (on average 2.5550408291457285) internal successors, (65082), 25472 states have internal predecessors, (65082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25473 states to 25473 states and 65082 transitions. [2021-02-19 17:23:30,523 INFO L78 Accepts]: Start accepts. Automaton has 25473 states and 65082 transitions. Word has length 59 [2021-02-19 17:23:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:30,523 INFO L480 AbstractCegarLoop]: Abstraction has 25473 states and 65082 transitions. [2021-02-19 17:23:30,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 25473 states and 65082 transitions. [2021-02-19 17:23:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:30,539 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:30,539 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:30,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable898 [2021-02-19 17:23:30,740 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:30,740 INFO L82 PathProgramCache]: Analyzing trace with hash -936645280, now seen corresponding path program 252 times [2021-02-19 17:23:30,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:30,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294483390] [2021-02-19 17:23:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:30,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294483390] [2021-02-19 17:23:30,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640708767] [2021-02-19 17:23:30,876 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 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:30,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-02-19 17:23:30,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:31,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:31,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:31,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692765537] [2021-02-19 17:23:31,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:31,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:31,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:31,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:31,064 INFO L87 Difference]: Start difference. First operand 25473 states and 65082 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:32,056 INFO L93 Difference]: Finished difference Result 27214 states and 68571 transitions. [2021-02-19 17:23:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:32,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:32,094 INFO L225 Difference]: With dead ends: 27214 [2021-02-19 17:23:32,094 INFO L226 Difference]: Without dead ends: 27169 [2021-02-19 17:23:32,094 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27169 states. [2021-02-19 17:23:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27169 to 25427. [2021-02-19 17:23:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25427 states, 25426 states have (on average 2.5551010776370644) internal successors, (64966), 25426 states have internal predecessors, (64966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25427 states to 25427 states and 64966 transitions. [2021-02-19 17:23:32,601 INFO L78 Accepts]: Start accepts. Automaton has 25427 states and 64966 transitions. Word has length 59 [2021-02-19 17:23:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:32,601 INFO L480 AbstractCegarLoop]: Abstraction has 25427 states and 64966 transitions. [2021-02-19 17:23:32,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25427 states and 64966 transitions. [2021-02-19 17:23:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:32,615 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:32,615 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:32,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable899,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:32,816 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:32,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1709964513, now seen corresponding path program 253 times [2021-02-19 17:23:32,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:32,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782642449] [2021-02-19 17:23:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:32,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782642449] [2021-02-19 17:23:32,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723693512] [2021-02-19 17:23:32,918 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 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:32,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:33,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:33,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:23:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492008716] [2021-02-19 17:23:33,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:33,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:33,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:33,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:33,092 INFO L87 Difference]: Start difference. First operand 25427 states and 64966 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:33,455 INFO L93 Difference]: Finished difference Result 28233 states and 70403 transitions. [2021-02-19 17:23:33,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:33,490 INFO L225 Difference]: With dead ends: 28233 [2021-02-19 17:23:33,491 INFO L226 Difference]: Without dead ends: 28215 [2021-02-19 17:23:33,491 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28215 states. [2021-02-19 17:23:33,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28215 to 25276. [2021-02-19 17:23:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25276 states, 25275 states have (on average 2.5537883283877347) internal successors, (64547), 25275 states have internal predecessors, (64547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25276 states to 25276 states and 64547 transitions. [2021-02-19 17:23:33,868 INFO L78 Accepts]: Start accepts. Automaton has 25276 states and 64547 transitions. Word has length 59 [2021-02-19 17:23:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:33,869 INFO L480 AbstractCegarLoop]: Abstraction has 25276 states and 64547 transitions. [2021-02-19 17:23:33,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 25276 states and 64547 transitions. [2021-02-19 17:23:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:33,887 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:33,887 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:34,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:34,088 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:34,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1205272054, now seen corresponding path program 254 times [2021-02-19 17:23:34,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:34,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482121231] [2021-02-19 17:23:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:34,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482121231] [2021-02-19 17:23:34,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340512670] [2021-02-19 17:23:34,224 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 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:34,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:34,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:34,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:34,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:34,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:34,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:23:34,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4350405] [2021-02-19 17:23:34,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:34,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:34,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:34,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:34,395 INFO L87 Difference]: Start difference. First operand 25276 states and 64547 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:23:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:35,492 INFO L93 Difference]: Finished difference Result 29095 states and 72693 transitions. [2021-02-19 17:23:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:23:35,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 59 [2021-02-19 17:23:35,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:35,533 INFO L225 Difference]: With dead ends: 29095 [2021-02-19 17:23:35,533 INFO L226 Difference]: Without dead ends: 29041 [2021-02-19 17:23:35,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:23:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29041 states. [2021-02-19 17:23:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29041 to 25454. [2021-02-19 17:23:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25454 states, 25453 states have (on average 2.5548658311397476) internal successors, (65029), 25453 states have internal predecessors, (65029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25454 states to 25454 states and 65029 transitions. [2021-02-19 17:23:35,936 INFO L78 Accepts]: Start accepts. Automaton has 25454 states and 65029 transitions. Word has length 59 [2021-02-19 17:23:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:35,936 INFO L480 AbstractCegarLoop]: Abstraction has 25454 states and 65029 transitions. [2021-02-19 17:23:35,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:23:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 25454 states and 65029 transitions. [2021-02-19 17:23:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:35,950 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:35,950 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:36,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-02-19 17:23:36,150 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:36,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1557136133, now seen corresponding path program 255 times [2021-02-19 17:23:36,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:36,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343502567] [2021-02-19 17:23:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:36,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343502567] [2021-02-19 17:23:36,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009917758] [2021-02-19 17:23:36,282 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 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:36,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 17:23:36,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:36,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:36,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:36,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:23:36,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126434360] [2021-02-19 17:23:36,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:36,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:36,455 INFO L87 Difference]: Start difference. First operand 25454 states and 65029 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:36,889 INFO L93 Difference]: Finished difference Result 28434 states and 70864 transitions. [2021-02-19 17:23:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:36,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:36,928 INFO L225 Difference]: With dead ends: 28434 [2021-02-19 17:23:36,928 INFO L226 Difference]: Without dead ends: 28410 [2021-02-19 17:23:36,928 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28410 states. [2021-02-19 17:23:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28410 to 25454. [2021-02-19 17:23:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25454 states, 25453 states have (on average 2.554197933445959) internal successors, (65012), 25453 states have internal predecessors, (65012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25454 states to 25454 states and 65012 transitions. [2021-02-19 17:23:37,386 INFO L78 Accepts]: Start accepts. Automaton has 25454 states and 65012 transitions. Word has length 59 [2021-02-19 17:23:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:37,386 INFO L480 AbstractCegarLoop]: Abstraction has 25454 states and 65012 transitions. [2021-02-19 17:23:37,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 25454 states and 65012 transitions. [2021-02-19 17:23:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:37,404 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:37,404 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:37,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:37,605 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1360108588, now seen corresponding path program 256 times [2021-02-19 17:23:37,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:37,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43858638] [2021-02-19 17:23:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:37,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43858638] [2021-02-19 17:23:37,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158440856] [2021-02-19 17:23:37,766 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 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:37,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:37,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:37,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:37,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:37,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:37,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:23:37,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844359480] [2021-02-19 17:23:37,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:37,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:37,948 INFO L87 Difference]: Start difference. First operand 25454 states and 65012 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:23:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:39,506 INFO L93 Difference]: Finished difference Result 32250 states and 79841 transitions. [2021-02-19 17:23:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 17:23:39,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 59 [2021-02-19 17:23:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:39,549 INFO L225 Difference]: With dead ends: 32250 [2021-02-19 17:23:39,549 INFO L226 Difference]: Without dead ends: 32136 [2021-02-19 17:23:39,549 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:23:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32136 states. [2021-02-19 17:23:39,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32136 to 25642. [2021-02-19 17:23:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25642 states, 25641 states have (on average 2.5557895557895556) internal successors, (65533), 25641 states have internal predecessors, (65533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25642 states to 25642 states and 65533 transitions. [2021-02-19 17:23:39,982 INFO L78 Accepts]: Start accepts. Automaton has 25642 states and 65533 transitions. Word has length 59 [2021-02-19 17:23:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:39,982 INFO L480 AbstractCegarLoop]: Abstraction has 25642 states and 65533 transitions. [2021-02-19 17:23:39,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:23:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 25642 states and 65533 transitions. [2021-02-19 17:23:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:39,999 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:39,999 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:40,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:40,199 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1746711265, now seen corresponding path program 257 times [2021-02-19 17:23:40,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:40,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523357184] [2021-02-19 17:23:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:40,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523357184] [2021-02-19 17:23:40,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458420495] [2021-02-19 17:23:40,333 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 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:40,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:23:40,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:40,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:40,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 18 [2021-02-19 17:23:40,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454806213] [2021-02-19 17:23:40,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:23:40,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:40,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:23:40,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:40,553 INFO L87 Difference]: Start difference. First operand 25642 states and 65533 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:41,105 INFO L93 Difference]: Finished difference Result 28882 states and 71918 transitions. [2021-02-19 17:23:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:41,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:41,144 INFO L225 Difference]: With dead ends: 28882 [2021-02-19 17:23:41,144 INFO L226 Difference]: Without dead ends: 28849 [2021-02-19 17:23:41,144 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28849 states. [2021-02-19 17:23:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28849 to 25297. [2021-02-19 17:23:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25297 states, 25296 states have (on average 2.552063567362429) internal successors, (64557), 25296 states have internal predecessors, (64557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25297 states to 25297 states and 64557 transitions. [2021-02-19 17:23:41,548 INFO L78 Accepts]: Start accepts. Automaton has 25297 states and 64557 transitions. Word has length 59 [2021-02-19 17:23:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:41,548 INFO L480 AbstractCegarLoop]: Abstraction has 25297 states and 64557 transitions. [2021-02-19 17:23:41,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 25297 states and 64557 transitions. [2021-02-19 17:23:41,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:41,564 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:41,564 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:41,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-02-19 17:23:41,764 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1300417078, now seen corresponding path program 258 times [2021-02-19 17:23:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:41,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229468852] [2021-02-19 17:23:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:42,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229468852] [2021-02-19 17:23:42,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964427505] [2021-02-19 17:23:42,021 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 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:42,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-02-19 17:23:42,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:42,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:42,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:23:42,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116911992] [2021-02-19 17:23:42,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:42,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:42,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:42,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:42,228 INFO L87 Difference]: Start difference. First operand 25297 states and 64557 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2021-02-19 17:23:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:43,568 INFO L93 Difference]: Finished difference Result 30804 states and 76252 transitions. [2021-02-19 17:23:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:23:43,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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 59 [2021-02-19 17:23:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:43,611 INFO L225 Difference]: With dead ends: 30804 [2021-02-19 17:23:43,611 INFO L226 Difference]: Without dead ends: 30648 [2021-02-19 17:23:43,611 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:23:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30648 states. [2021-02-19 17:23:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30648 to 24896. [2021-02-19 17:23:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24896 states, 24895 states have (on average 2.5465756175938945) internal successors, (63397), 24895 states have internal predecessors, (63397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24896 states to 24896 states and 63397 transitions. [2021-02-19 17:23:44,019 INFO L78 Accepts]: Start accepts. Automaton has 24896 states and 63397 transitions. Word has length 59 [2021-02-19 17:23:44,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:44,020 INFO L480 AbstractCegarLoop]: Abstraction has 24896 states and 63397 transitions. [2021-02-19 17:23:44,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2021-02-19 17:23:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 24896 states and 63397 transitions. [2021-02-19 17:23:44,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:44,035 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:44,035 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:44,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:44,236 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:44,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:44,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1062355561, now seen corresponding path program 136 times [2021-02-19 17:23:44,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:44,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301535824] [2021-02-19 17:23:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:44,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301535824] [2021-02-19 17:23:44,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070662521] [2021-02-19 17:23:44,338 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 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:44,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:44,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:44,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:44,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:23:44,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319401540] [2021-02-19 17:23:44,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:44,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:44,504 INFO L87 Difference]: Start difference. First operand 24896 states and 63397 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:44,861 INFO L93 Difference]: Finished difference Result 29677 states and 73019 transitions. [2021-02-19 17:23:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:44,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:44,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:44,903 INFO L225 Difference]: With dead ends: 29677 [2021-02-19 17:23:44,903 INFO L226 Difference]: Without dead ends: 29663 [2021-02-19 17:23:44,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29663 states. [2021-02-19 17:23:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29663 to 25237. [2021-02-19 17:23:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25237 states, 25236 states have (on average 2.5500871770486606) internal successors, (64354), 25236 states have internal predecessors, (64354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25237 states to 25237 states and 64354 transitions. [2021-02-19 17:23:45,316 INFO L78 Accepts]: Start accepts. Automaton has 25237 states and 64354 transitions. Word has length 59 [2021-02-19 17:23:45,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:45,316 INFO L480 AbstractCegarLoop]: Abstraction has 25237 states and 64354 transitions. [2021-02-19 17:23:45,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 25237 states and 64354 transitions. [2021-02-19 17:23:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:45,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:45,332 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:45,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:45,532 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:45,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash 440475151, now seen corresponding path program 137 times [2021-02-19 17:23:45,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:45,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777319857] [2021-02-19 17:23:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:45,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777319857] [2021-02-19 17:23:45,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776039582] [2021-02-19 17:23:45,629 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 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:45,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-02-19 17:23:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:45,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:45,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:45,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-02-19 17:23:45,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376243967] [2021-02-19 17:23:45,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:45,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:45,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:45,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:45,831 INFO L87 Difference]: Start difference. First operand 25237 states and 64354 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:46,301 INFO L93 Difference]: Finished difference Result 37067 states and 90461 transitions. [2021-02-19 17:23:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:46,357 INFO L225 Difference]: With dead ends: 37067 [2021-02-19 17:23:46,357 INFO L226 Difference]: Without dead ends: 37067 [2021-02-19 17:23:46,357 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37067 states. [2021-02-19 17:23:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37067 to 25251. [2021-02-19 17:23:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25251 states, 25250 states have (on average 2.5503366336633664) internal successors, (64396), 25250 states have internal predecessors, (64396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25251 states to 25251 states and 64396 transitions. [2021-02-19 17:23:46,866 INFO L78 Accepts]: Start accepts. Automaton has 25251 states and 64396 transitions. Word has length 59 [2021-02-19 17:23:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:46,867 INFO L480 AbstractCegarLoop]: Abstraction has 25251 states and 64396 transitions. [2021-02-19 17:23:46,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 25251 states and 64396 transitions. [2021-02-19 17:23:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:46,882 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:46,882 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:47,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:47,083 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1197097305, now seen corresponding path program 138 times [2021-02-19 17:23:47,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:47,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193448902] [2021-02-19 17:23:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 131 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:47,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193448902] [2021-02-19 17:23:47,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649654429] [2021-02-19 17:23:47,212 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 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:47,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-02-19 17:23:47,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:47,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 132 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:47,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:47,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:23:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593988541] [2021-02-19 17:23:47,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:47,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:47,429 INFO L87 Difference]: Start difference. First operand 25251 states and 64396 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:47,989 INFO L93 Difference]: Finished difference Result 38843 states and 94736 transitions. [2021-02-19 17:23:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:48,040 INFO L225 Difference]: With dead ends: 38843 [2021-02-19 17:23:48,041 INFO L226 Difference]: Without dead ends: 38843 [2021-02-19 17:23:48,041 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:23:48,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38843 states. [2021-02-19 17:23:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38843 to 25289. [2021-02-19 17:23:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25289 states, 25288 states have (on average 2.551170515659601) internal successors, (64514), 25288 states have internal predecessors, (64514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 64514 transitions. [2021-02-19 17:23:48,518 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 64514 transitions. Word has length 59 [2021-02-19 17:23:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:48,518 INFO L480 AbstractCegarLoop]: Abstraction has 25289 states and 64514 transitions. [2021-02-19 17:23:48,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 64514 transitions. [2021-02-19 17:23:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:48,534 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:48,534 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:48,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-02-19 17:23:48,734 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874827, now seen corresponding path program 139 times [2021-02-19 17:23:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:48,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832488493] [2021-02-19 17:23:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:48,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832488493] [2021-02-19 17:23:48,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581440526] [2021-02-19 17:23:48,860 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 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:48,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:48,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 119 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:49,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:49,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-02-19 17:23:49,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72939137] [2021-02-19 17:23:49,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:49,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:49,036 INFO L87 Difference]: Start difference. First operand 25289 states and 64514 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:49,593 INFO L93 Difference]: Finished difference Result 36124 states and 88274 transitions. [2021-02-19 17:23:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:49,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:49,641 INFO L225 Difference]: With dead ends: 36124 [2021-02-19 17:23:49,641 INFO L226 Difference]: Without dead ends: 36124 [2021-02-19 17:23:49,641 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36124 states. [2021-02-19 17:23:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36124 to 25321. [2021-02-19 17:23:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25321 states, 25320 states have (on average 2.551658767772512) internal successors, (64608), 25320 states have internal predecessors, (64608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:50,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25321 states to 25321 states and 64608 transitions. [2021-02-19 17:23:50,073 INFO L78 Accepts]: Start accepts. Automaton has 25321 states and 64608 transitions. Word has length 59 [2021-02-19 17:23:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:50,073 INFO L480 AbstractCegarLoop]: Abstraction has 25321 states and 64608 transitions. [2021-02-19 17:23:50,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 25321 states and 64608 transitions. [2021-02-19 17:23:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:50,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:50,089 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:50,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-02-19 17:23:50,290 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash 368587815, now seen corresponding path program 140 times [2021-02-19 17:23:50,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:50,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975944115] [2021-02-19 17:23:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:50,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975944115] [2021-02-19 17:23:50,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972274628] [2021-02-19 17:23:50,432 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 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:50,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:50,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:50,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:50,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:50,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-02-19 17:23:50,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137665890] [2021-02-19 17:23:50,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:23:50,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:50,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:23:50,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:50,611 INFO L87 Difference]: Start difference. First operand 25321 states and 64608 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:51,105 INFO L93 Difference]: Finished difference Result 31083 states and 76490 transitions. [2021-02-19 17:23:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:51,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:51,146 INFO L225 Difference]: With dead ends: 31083 [2021-02-19 17:23:51,147 INFO L226 Difference]: Without dead ends: 31083 [2021-02-19 17:23:51,147 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31083 states. [2021-02-19 17:23:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31083 to 24935. [2021-02-19 17:23:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24935 states, 24934 states have (on average 2.5468436672816237) internal successors, (63503), 24934 states have internal predecessors, (63503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24935 states to 24935 states and 63503 transitions. [2021-02-19 17:23:51,585 INFO L78 Accepts]: Start accepts. Automaton has 24935 states and 63503 transitions. Word has length 59 [2021-02-19 17:23:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:51,585 INFO L480 AbstractCegarLoop]: Abstraction has 24935 states and 63503 transitions. [2021-02-19 17:23:51,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 24935 states and 63503 transitions. [2021-02-19 17:23:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:51,601 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:51,601 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:51,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-02-19 17:23:51,802 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:51,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:51,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1100977349, now seen corresponding path program 259 times [2021-02-19 17:23:51,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:51,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804000016] [2021-02-19 17:23:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:51,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804000016] [2021-02-19 17:23:51,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873107388] [2021-02-19 17:23:51,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:52,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:52,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-02-19 17:23:52,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806362499] [2021-02-19 17:23:52,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:52,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:52,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:52,137 INFO L87 Difference]: Start difference. First operand 24935 states and 63503 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:52,631 INFO L93 Difference]: Finished difference Result 27618 states and 68802 transitions. [2021-02-19 17:23:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:23:52,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:52,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:52,666 INFO L225 Difference]: With dead ends: 27618 [2021-02-19 17:23:52,666 INFO L226 Difference]: Without dead ends: 27582 [2021-02-19 17:23:52,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2021-02-19 17:23:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 24935. [2021-02-19 17:23:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24935 states, 24934 states have (on average 2.54636239672736) internal successors, (63491), 24934 states have internal predecessors, (63491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24935 states to 24935 states and 63491 transitions. [2021-02-19 17:23:53,028 INFO L78 Accepts]: Start accepts. Automaton has 24935 states and 63491 transitions. Word has length 59 [2021-02-19 17:23:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:53,028 INFO L480 AbstractCegarLoop]: Abstraction has 24935 states and 63491 transitions. [2021-02-19 17:23:53,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 24935 states and 63491 transitions. [2021-02-19 17:23:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:53,045 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:53,045 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:53,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-02-19 17:23:53,246 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:53,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1176780090, now seen corresponding path program 141 times [2021-02-19 17:23:53,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:53,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582710597] [2021-02-19 17:23:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582710597] [2021-02-19 17:23:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799572542] [2021-02-19 17:23:53,386 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 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:53,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-02-19 17:23:53,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:53,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:53,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:53,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:53,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637056446] [2021-02-19 17:23:53,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:53,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:53,554 INFO L87 Difference]: Start difference. First operand 24935 states and 63491 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:54,423 INFO L93 Difference]: Finished difference Result 27040 states and 67819 transitions. [2021-02-19 17:23:54,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:54,424 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:54,460 INFO L225 Difference]: With dead ends: 27040 [2021-02-19 17:23:54,460 INFO L226 Difference]: Without dead ends: 27005 [2021-02-19 17:23:54,460 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27005 states. [2021-02-19 17:23:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27005 to 25020. [2021-02-19 17:23:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25020 states, 25019 states have (on average 2.5463447779687436) internal successors, (63707), 25019 states have internal predecessors, (63707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25020 states to 25020 states and 63707 transitions. [2021-02-19 17:23:54,835 INFO L78 Accepts]: Start accepts. Automaton has 25020 states and 63707 transitions. Word has length 59 [2021-02-19 17:23:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:54,835 INFO L480 AbstractCegarLoop]: Abstraction has 25020 states and 63707 transitions. [2021-02-19 17:23:54,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 25020 states and 63707 transitions. [2021-02-19 17:23:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:54,849 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:54,849 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:55,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:55,049 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:55,050 INFO L82 PathProgramCache]: Analyzing trace with hash -376916767, now seen corresponding path program 260 times [2021-02-19 17:23:55,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:55,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104155324] [2021-02-19 17:23:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 113 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:55,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104155324] [2021-02-19 17:23:55,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694685781] [2021-02-19 17:23:55,154 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 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:55,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:55,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:55,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 113 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:55,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:55,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:23:55,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462622307] [2021-02-19 17:23:55,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:55,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:55,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:55,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:55,359 INFO L87 Difference]: Start difference. First operand 25020 states and 63707 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:55,708 INFO L93 Difference]: Finished difference Result 28168 states and 69936 transitions. [2021-02-19 17:23:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:23:55,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:55,745 INFO L225 Difference]: With dead ends: 28168 [2021-02-19 17:23:55,745 INFO L226 Difference]: Without dead ends: 28165 [2021-02-19 17:23:55,745 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28165 states. [2021-02-19 17:23:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28165 to 25006. [2021-02-19 17:23:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25006 states, 25005 states have (on average 2.5455708858228356) internal successors, (63652), 25005 states have internal predecessors, (63652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:56,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25006 states to 25006 states and 63652 transitions. [2021-02-19 17:23:56,166 INFO L78 Accepts]: Start accepts. Automaton has 25006 states and 63652 transitions. Word has length 59 [2021-02-19 17:23:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:56,167 INFO L480 AbstractCegarLoop]: Abstraction has 25006 states and 63652 transitions. [2021-02-19 17:23:56,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 25006 states and 63652 transitions. [2021-02-19 17:23:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:56,182 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:56,182 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:56,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:56,382 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash -169854201, now seen corresponding path program 261 times [2021-02-19 17:23:56,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:56,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300797217] [2021-02-19 17:23:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 119 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:56,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300797217] [2021-02-19 17:23:56,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821579712] [2021-02-19 17:23:56,492 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 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:56,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-02-19 17:23:56,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:56,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:23:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 119 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:56,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:56,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:23:56,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392806831] [2021-02-19 17:23:56,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:56,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:56,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:56,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:56,662 INFO L87 Difference]: Start difference. First operand 25006 states and 63652 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:57,020 INFO L93 Difference]: Finished difference Result 28190 states and 69930 transitions. [2021-02-19 17:23:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:57,057 INFO L225 Difference]: With dead ends: 28190 [2021-02-19 17:23:57,058 INFO L226 Difference]: Without dead ends: 28172 [2021-02-19 17:23:57,058 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28172 states. [2021-02-19 17:23:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28172 to 25006. [2021-02-19 17:23:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25006 states, 25005 states have (on average 2.5447710457908417) internal successors, (63632), 25005 states have internal predecessors, (63632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25006 states to 25006 states and 63632 transitions. [2021-02-19 17:23:57,439 INFO L78 Accepts]: Start accepts. Automaton has 25006 states and 63632 transitions. Word has length 59 [2021-02-19 17:23:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:57,439 INFO L480 AbstractCegarLoop]: Abstraction has 25006 states and 63632 transitions. [2021-02-19 17:23:57,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,439 INFO L276 IsEmpty]: Start isEmpty. Operand 25006 states and 63632 transitions. [2021-02-19 17:23:57,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:57,455 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:57,455 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:57,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-02-19 17:23:57,655 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:57,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1617854214, now seen corresponding path program 262 times [2021-02-19 17:23:57,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:57,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125073943] [2021-02-19 17:23:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:57,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125073943] [2021-02-19 17:23:57,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305589159] [2021-02-19 17:23:57,794 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 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:57,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:57,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:57,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:57,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:23:57,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957964669] [2021-02-19 17:23:57,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:57,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:57,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:57,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:57,976 INFO L87 Difference]: Start difference. First operand 25006 states and 63632 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:59,213 INFO L93 Difference]: Finished difference Result 26195 states and 65912 transitions. [2021-02-19 17:23:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:23:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:59,248 INFO L225 Difference]: With dead ends: 26195 [2021-02-19 17:23:59,248 INFO L226 Difference]: Without dead ends: 26101 [2021-02-19 17:23:59,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26101 states. [2021-02-19 17:23:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26101 to 25156. [2021-02-19 17:23:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25156 states, 25155 states have (on average 2.541125024845955) internal successors, (63922), 25155 states have internal predecessors, (63922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25156 states to 25156 states and 63922 transitions. [2021-02-19 17:23:59,602 INFO L78 Accepts]: Start accepts. Automaton has 25156 states and 63922 transitions. Word has length 59 [2021-02-19 17:23:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:59,602 INFO L480 AbstractCegarLoop]: Abstraction has 25156 states and 63922 transitions. [2021-02-19 17:23:59,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25156 states and 63922 transitions. [2021-02-19 17:23:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:23:59,617 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:59,617 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:59,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable933 [2021-02-19 17:23:59,818 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2063576902, now seen corresponding path program 263 times [2021-02-19 17:23:59,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:59,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037586180] [2021-02-19 17:23:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:23:59,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037586180] [2021-02-19 17:23:59,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513108386] [2021-02-19 17:23:59,952 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 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:59,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-02-19 17:23:59,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:23:59,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:24:00,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:00,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:24:00,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492076749] [2021-02-19 17:24:00,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:00,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:00,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:00,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:00,122 INFO L87 Difference]: Start difference. First operand 25156 states and 63922 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:01,021 INFO L93 Difference]: Finished difference Result 26924 states and 67481 transitions. [2021-02-19 17:24:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:01,056 INFO L225 Difference]: With dead ends: 26924 [2021-02-19 17:24:01,056 INFO L226 Difference]: Without dead ends: 26870 [2021-02-19 17:24:01,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26870 states. [2021-02-19 17:24:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26870 to 25174. [2021-02-19 17:24:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25174 states, 25173 states have (on average 2.5411353434235093) internal successors, (63968), 25173 states have internal predecessors, (63968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25174 states to 25174 states and 63968 transitions. [2021-02-19 17:24:01,482 INFO L78 Accepts]: Start accepts. Automaton has 25174 states and 63968 transitions. Word has length 59 [2021-02-19 17:24:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:01,482 INFO L480 AbstractCegarLoop]: Abstraction has 25174 states and 63968 transitions. [2021-02-19 17:24:01,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand 25174 states and 63968 transitions. [2021-02-19 17:24:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:01,498 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:01,498 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:01,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable934,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:01,699 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:01,699 INFO L82 PathProgramCache]: Analyzing trace with hash -89473060, now seen corresponding path program 264 times [2021-02-19 17:24:01,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:01,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536190934] [2021-02-19 17:24:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:01,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536190934] [2021-02-19 17:24:01,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85862199] [2021-02-19 17:24:01,851 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 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:01,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-02-19 17:24:01,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:01,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:02,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:02,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:02,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116299133] [2021-02-19 17:24:02,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:02,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:02,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:02,023 INFO L87 Difference]: Start difference. First operand 25174 states and 63968 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:24:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:03,271 INFO L93 Difference]: Finished difference Result 28986 states and 72048 transitions. [2021-02-19 17:24:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:24:03,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 59 [2021-02-19 17:24:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:03,310 INFO L225 Difference]: With dead ends: 28986 [2021-02-19 17:24:03,310 INFO L226 Difference]: Without dead ends: 28932 [2021-02-19 17:24:03,311 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:24:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28932 states. [2021-02-19 17:24:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28932 to 25413. [2021-02-19 17:24:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25413 states, 25412 states have (on average 2.5427357154100423) internal successors, (64616), 25412 states have internal predecessors, (64616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25413 states to 25413 states and 64616 transitions. [2021-02-19 17:24:03,728 INFO L78 Accepts]: Start accepts. Automaton has 25413 states and 64616 transitions. Word has length 59 [2021-02-19 17:24:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:03,728 INFO L480 AbstractCegarLoop]: Abstraction has 25413 states and 64616 transitions. [2021-02-19 17:24:03,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:24:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 25413 states and 64616 transitions. [2021-02-19 17:24:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:03,744 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:03,744 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:03,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-02-19 17:24:03,945 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:03,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:03,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1443086049, now seen corresponding path program 265 times [2021-02-19 17:24:03,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:03,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614111730] [2021-02-19 17:24:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:04,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614111730] [2021-02-19 17:24:04,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087724910] [2021-02-19 17:24:04,060 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 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:04,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:04,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:04,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:24:04,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114554329] [2021-02-19 17:24:04,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:04,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:04,225 INFO L87 Difference]: Start difference. First operand 25413 states and 64616 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:04,604 INFO L93 Difference]: Finished difference Result 28694 states and 71095 transitions. [2021-02-19 17:24:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:24:04,605 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:04,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:04,641 INFO L225 Difference]: With dead ends: 28694 [2021-02-19 17:24:04,641 INFO L226 Difference]: Without dead ends: 28670 [2021-02-19 17:24:04,641 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:04,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28670 states. [2021-02-19 17:24:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28670 to 25413. [2021-02-19 17:24:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25413 states, 25412 states have (on average 2.542184794585235) internal successors, (64602), 25412 states have internal predecessors, (64602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:05,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25413 states to 25413 states and 64602 transitions. [2021-02-19 17:24:05,054 INFO L78 Accepts]: Start accepts. Automaton has 25413 states and 64602 transitions. Word has length 59 [2021-02-19 17:24:05,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:05,054 INFO L480 AbstractCegarLoop]: Abstraction has 25413 states and 64602 transitions. [2021-02-19 17:24:05,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand 25413 states and 64602 transitions. [2021-02-19 17:24:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:05,069 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:05,069 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:05,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable936 [2021-02-19 17:24:05,270 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:05,270 INFO L82 PathProgramCache]: Analyzing trace with hash 65363474, now seen corresponding path program 266 times [2021-02-19 17:24:05,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:05,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191560204] [2021-02-19 17:24:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:05,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191560204] [2021-02-19 17:24:05,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922456966] [2021-02-19 17:24:05,422 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 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:05,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:05,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:05,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:05,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:05,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:05,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:05,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983613414] [2021-02-19 17:24:05,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:05,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:05,588 INFO L87 Difference]: Start difference. First operand 25413 states and 64602 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:24:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:07,392 INFO L93 Difference]: Finished difference Result 33467 states and 82122 transitions. [2021-02-19 17:24:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 17:24:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 59 [2021-02-19 17:24:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:07,433 INFO L225 Difference]: With dead ends: 33467 [2021-02-19 17:24:07,434 INFO L226 Difference]: Without dead ends: 33287 [2021-02-19 17:24:07,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 17:24:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33287 states. [2021-02-19 17:24:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33287 to 25832. [2021-02-19 17:24:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25832 states, 25831 states have (on average 2.544578219968255) internal successors, (65729), 25831 states have internal predecessors, (65729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25832 states to 25832 states and 65729 transitions. [2021-02-19 17:24:07,845 INFO L78 Accepts]: Start accepts. Automaton has 25832 states and 65729 transitions. Word has length 59 [2021-02-19 17:24:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:07,845 INFO L480 AbstractCegarLoop]: Abstraction has 25832 states and 65729 transitions. [2021-02-19 17:24:07,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:24:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 25832 states and 65729 transitions. [2021-02-19 17:24:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:07,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:07,860 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:08,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:08,061 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:08,061 INFO L82 PathProgramCache]: Analyzing trace with hash 451966151, now seen corresponding path program 267 times [2021-02-19 17:24:08,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:08,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678822963] [2021-02-19 17:24:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:08,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678822963] [2021-02-19 17:24:08,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700692952] [2021-02-19 17:24:08,194 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 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:08,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 17:24:08,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:08,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:08,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:08,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:24:08,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570639001] [2021-02-19 17:24:08,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:08,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:08,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:08,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:08,383 INFO L87 Difference]: Start difference. First operand 25832 states and 65729 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:08,777 INFO L93 Difference]: Finished difference Result 29246 states and 72456 transitions. [2021-02-19 17:24:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:24:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:08,815 INFO L225 Difference]: With dead ends: 29246 [2021-02-19 17:24:08,816 INFO L226 Difference]: Without dead ends: 29213 [2021-02-19 17:24:08,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:24:08,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29213 states. [2021-02-19 17:24:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29213 to 25832. [2021-02-19 17:24:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25832 states, 25831 states have (on average 2.544229801401417) internal successors, (65720), 25831 states have internal predecessors, (65720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25832 states to 25832 states and 65720 transitions. [2021-02-19 17:24:09,221 INFO L78 Accepts]: Start accepts. Automaton has 25832 states and 65720 transitions. Word has length 59 [2021-02-19 17:24:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:09,221 INFO L480 AbstractCegarLoop]: Abstraction has 25832 states and 65720 transitions. [2021-02-19 17:24:09,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:09,221 INFO L276 IsEmpty]: Start isEmpty. Operand 25832 states and 65720 transitions. [2021-02-19 17:24:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:09,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:09,239 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:09,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-02-19 17:24:09,444 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash 5671964, now seen corresponding path program 268 times [2021-02-19 17:24:09,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:09,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629329099] [2021-02-19 17:24:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:09,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629329099] [2021-02-19 17:24:09,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446072887] [2021-02-19 17:24:09,610 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 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:09,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:09,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:09,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:09,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:09,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:24:09,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450970065] [2021-02-19 17:24:09,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:09,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:09,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:09,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:09,788 INFO L87 Difference]: Start difference. First operand 25832 states and 65720 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) [2021-02-19 17:24:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:11,909 INFO L93 Difference]: Finished difference Result 39206 states and 95366 transitions. [2021-02-19 17:24:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 17:24:11,910 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 59 [2021-02-19 17:24:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:11,955 INFO L225 Difference]: With dead ends: 39206 [2021-02-19 17:24:11,955 INFO L226 Difference]: Without dead ends: 38930 [2021-02-19 17:24:11,956 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 17:24:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38930 states. [2021-02-19 17:24:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38930 to 26140. [2021-02-19 17:24:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26140 states, 26139 states have (on average 2.5464631393702897) internal successors, (66562), 26139 states have internal predecessors, (66562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26140 states to 26140 states and 66562 transitions. [2021-02-19 17:24:12,467 INFO L78 Accepts]: Start accepts. Automaton has 26140 states and 66562 transitions. Word has length 59 [2021-02-19 17:24:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:12,467 INFO L480 AbstractCegarLoop]: Abstraction has 26140 states and 66562 transitions. [2021-02-19 17:24:12,467 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) [2021-02-19 17:24:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 26140 states and 66562 transitions. [2021-02-19 17:24:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:12,483 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:12,483 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:12,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable946,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:12,683 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:12,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1899244833, now seen corresponding path program 269 times [2021-02-19 17:24:12,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:12,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989345105] [2021-02-19 17:24:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989345105] [2021-02-19 17:24:12,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269256998] [2021-02-19 17:24:12,829 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 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:12,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:24:12,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:12,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:12,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:13,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:13,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 18 [2021-02-19 17:24:13,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635808911] [2021-02-19 17:24:13,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:24:13,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:24:13,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:13,051 INFO L87 Difference]: Start difference. First operand 26140 states and 66562 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:13,665 INFO L93 Difference]: Finished difference Result 29796 states and 73799 transitions. [2021-02-19 17:24:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:13,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:13,704 INFO L225 Difference]: With dead ends: 29796 [2021-02-19 17:24:13,704 INFO L226 Difference]: Without dead ends: 29754 [2021-02-19 17:24:13,704 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29754 states. [2021-02-19 17:24:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29754 to 25815. [2021-02-19 17:24:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25815 states, 25814 states have (on average 2.5435810025567522) internal successors, (65660), 25814 states have internal predecessors, (65660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25815 states to 25815 states and 65660 transitions. [2021-02-19 17:24:14,102 INFO L78 Accepts]: Start accepts. Automaton has 25815 states and 65660 transitions. Word has length 59 [2021-02-19 17:24:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:14,103 INFO L480 AbstractCegarLoop]: Abstraction has 25815 states and 65660 transitions. [2021-02-19 17:24:14,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 25815 states and 65660 transitions. [2021-02-19 17:24:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:14,120 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:14,120 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:14,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:14,321 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash -147641902, now seen corresponding path program 270 times [2021-02-19 17:24:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:14,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207680306] [2021-02-19 17:24:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:14,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207680306] [2021-02-19 17:24:14,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369466740] [2021-02-19 17:24:14,503 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 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:14,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-02-19 17:24:14,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:14,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:14,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:24:14,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879661614] [2021-02-19 17:24:14,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:14,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:14,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:14,675 INFO L87 Difference]: Start difference. First operand 25815 states and 65660 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2021-02-19 17:24:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:16,005 INFO L93 Difference]: Finished difference Result 32813 states and 80310 transitions. [2021-02-19 17:24:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 59 [2021-02-19 17:24:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:16,054 INFO L225 Difference]: With dead ends: 32813 [2021-02-19 17:24:16,054 INFO L226 Difference]: Without dead ends: 32435 [2021-02-19 17:24:16,054 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:24:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32435 states. [2021-02-19 17:24:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32435 to 24759. [2021-02-19 17:24:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24759 states, 24758 states have (on average 2.533807254220858) internal successors, (62732), 24758 states have internal predecessors, (62732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24759 states to 24759 states and 62732 transitions. [2021-02-19 17:24:16,499 INFO L78 Accepts]: Start accepts. Automaton has 24759 states and 62732 transitions. Word has length 59 [2021-02-19 17:24:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:16,499 INFO L480 AbstractCegarLoop]: Abstraction has 24759 states and 62732 transitions. [2021-02-19 17:24:16,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2021-02-19 17:24:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 24759 states and 62732 transitions. [2021-02-19 17:24:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:16,515 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:16,515 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:16,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:16,715 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:16,716 INFO L82 PathProgramCache]: Analyzing trace with hash -385703419, now seen corresponding path program 142 times [2021-02-19 17:24:16,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:16,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761550817] [2021-02-19 17:24:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:16,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761550817] [2021-02-19 17:24:16,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416938182] [2021-02-19 17:24:16,818 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 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:16,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:16,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:16,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:16,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:16,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:24:16,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744375321] [2021-02-19 17:24:16,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:16,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:16,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:16,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:16,993 INFO L87 Difference]: Start difference. First operand 24759 states and 62732 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:17,408 INFO L93 Difference]: Finished difference Result 29085 states and 71387 transitions. [2021-02-19 17:24:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:24:17,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:17,439 INFO L225 Difference]: With dead ends: 29085 [2021-02-19 17:24:17,439 INFO L226 Difference]: Without dead ends: 29071 [2021-02-19 17:24:17,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29071 states. [2021-02-19 17:24:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29071 to 25194. [2021-02-19 17:24:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25194 states, 25193 states have (on average 2.537133330687096) internal successors, (63918), 25193 states have internal predecessors, (63918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:17,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25194 states to 25194 states and 63918 transitions. [2021-02-19 17:24:17,814 INFO L78 Accepts]: Start accepts. Automaton has 25194 states and 63918 transitions. Word has length 59 [2021-02-19 17:24:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:17,814 INFO L480 AbstractCegarLoop]: Abstraction has 25194 states and 63918 transitions. [2021-02-19 17:24:17,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 25194 states and 63918 transitions. [2021-02-19 17:24:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:17,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:17,831 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:18,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-02-19 17:24:18,031 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:18,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1007583829, now seen corresponding path program 143 times [2021-02-19 17:24:18,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:18,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714931006] [2021-02-19 17:24:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:18,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714931006] [2021-02-19 17:24:18,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817311339] [2021-02-19 17:24:18,129 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 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:18,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-02-19 17:24:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:18,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:18,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:18,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-02-19 17:24:18,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565559664] [2021-02-19 17:24:18,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:18,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:18,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:18,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:18,330 INFO L87 Difference]: Start difference. First operand 25194 states and 63918 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:18,792 INFO L93 Difference]: Finished difference Result 36968 states and 90038 transitions. [2021-02-19 17:24:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:18,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:18,847 INFO L225 Difference]: With dead ends: 36968 [2021-02-19 17:24:18,847 INFO L226 Difference]: Without dead ends: 36968 [2021-02-19 17:24:18,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:24:18,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36968 states. [2021-02-19 17:24:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36968 to 25204. [2021-02-19 17:24:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25204 states, 25203 states have (on average 2.5373169860730864) internal successors, (63948), 25203 states have internal predecessors, (63948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25204 states to 25204 states and 63948 transitions. [2021-02-19 17:24:19,313 INFO L78 Accepts]: Start accepts. Automaton has 25204 states and 63948 transitions. Word has length 59 [2021-02-19 17:24:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:19,313 INFO L480 AbstractCegarLoop]: Abstraction has 25204 states and 63948 transitions. [2021-02-19 17:24:19,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 25204 states and 63948 transitions. [2021-02-19 17:24:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:19,329 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:19,329 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:19,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-02-19 17:24:19,529 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1649811011, now seen corresponding path program 144 times [2021-02-19 17:24:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:19,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803079147] [2021-02-19 17:24:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:19,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803079147] [2021-02-19 17:24:19,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007034262] [2021-02-19 17:24:19,646 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 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:19,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-02-19 17:24:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:19,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:19,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:24:19,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456859825] [2021-02-19 17:24:19,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:19,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:19,820 INFO L87 Difference]: Start difference. First operand 25204 states and 63948 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:20,578 INFO L93 Difference]: Finished difference Result 40151 states and 97682 transitions. [2021-02-19 17:24:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:20,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:20,632 INFO L225 Difference]: With dead ends: 40151 [2021-02-19 17:24:20,632 INFO L226 Difference]: Without dead ends: 40151 [2021-02-19 17:24:20,633 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40151 states. [2021-02-19 17:24:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40151 to 25240. [2021-02-19 17:24:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25240 states, 25239 states have (on average 2.538254288997187) internal successors, (64063), 25239 states have internal predecessors, (64063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25240 states to 25240 states and 64063 transitions. [2021-02-19 17:24:21,082 INFO L78 Accepts]: Start accepts. Automaton has 25240 states and 64063 transitions. Word has length 59 [2021-02-19 17:24:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:21,082 INFO L480 AbstractCegarLoop]: Abstraction has 25240 states and 64063 transitions. [2021-02-19 17:24:21,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 25240 states and 64063 transitions. [2021-02-19 17:24:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:21,098 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:21,098 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:21,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable957,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:21,299 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:21,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:21,299 INFO L82 PathProgramCache]: Analyzing trace with hash -40184153, now seen corresponding path program 145 times [2021-02-19 17:24:21,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:21,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397901464] [2021-02-19 17:24:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:21,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397901464] [2021-02-19 17:24:21,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278004477] [2021-02-19 17:24:21,449 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 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:21,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:21,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 127 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:21,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:21,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-02-19 17:24:21,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565393971] [2021-02-19 17:24:21,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:21,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:21,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:21,636 INFO L87 Difference]: Start difference. First operand 25240 states and 64063 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:22,352 INFO L93 Difference]: Finished difference Result 39779 states and 96847 transitions. [2021-02-19 17:24:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:22,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:22,407 INFO L225 Difference]: With dead ends: 39779 [2021-02-19 17:24:22,407 INFO L226 Difference]: Without dead ends: 39779 [2021-02-19 17:24:22,407 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=396, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:24:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-02-19 17:24:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 25271. [2021-02-19 17:24:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25271 states, 25270 states have (on average 2.5388603086664028) internal successors, (64157), 25270 states have internal predecessors, (64157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25271 states to 25271 states and 64157 transitions. [2021-02-19 17:24:22,888 INFO L78 Accepts]: Start accepts. Automaton has 25271 states and 64157 transitions. Word has length 59 [2021-02-19 17:24:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:22,888 INFO L480 AbstractCegarLoop]: Abstraction has 25271 states and 64157 transitions. [2021-02-19 17:24:22,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 25271 states and 64157 transitions. [2021-02-19 17:24:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:22,907 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:22,907 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:23,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-02-19 17:24:23,107 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1079471165, now seen corresponding path program 146 times [2021-02-19 17:24:23,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:23,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673063513] [2021-02-19 17:24:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:23,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673063513] [2021-02-19 17:24:23,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066882748] [2021-02-19 17:24:23,270 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 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:23,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:23,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:23,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:23,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:23,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-02-19 17:24:23,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748149996] [2021-02-19 17:24:23,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:23,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:23,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:23,456 INFO L87 Difference]: Start difference. First operand 25271 states and 64157 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:24,099 INFO L93 Difference]: Finished difference Result 35877 states and 87560 transitions. [2021-02-19 17:24:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:24,153 INFO L225 Difference]: With dead ends: 35877 [2021-02-19 17:24:24,153 INFO L226 Difference]: Without dead ends: 35877 [2021-02-19 17:24:24,154 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:24:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35877 states. [2021-02-19 17:24:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35877 to 25299. [2021-02-19 17:24:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25299 states, 25298 states have (on average 2.539252114791683) internal successors, (64238), 25298 states have internal predecessors, (64238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25299 states to 25299 states and 64238 transitions. [2021-02-19 17:24:24,599 INFO L78 Accepts]: Start accepts. Automaton has 25299 states and 64238 transitions. Word has length 59 [2021-02-19 17:24:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:24,599 INFO L480 AbstractCegarLoop]: Abstraction has 25299 states and 64238 transitions. [2021-02-19 17:24:24,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25299 states and 64238 transitions. [2021-02-19 17:24:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:24,615 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:24,615 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:24,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:24,816 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:24,816 INFO L82 PathProgramCache]: Analyzing trace with hash -59608793, now seen corresponding path program 147 times [2021-02-19 17:24:24,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:24,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298104846] [2021-02-19 17:24:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:24,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298104846] [2021-02-19 17:24:24,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275542084] [2021-02-19 17:24:24,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:25,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-02-19 17:24:25,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:25,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:25,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 107 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:25,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:25,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-02-19 17:24:25,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553355097] [2021-02-19 17:24:25,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:24:25,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:25,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:24:25,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:25,171 INFO L87 Difference]: Start difference. First operand 25299 states and 64238 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:25,785 INFO L93 Difference]: Finished difference Result 30625 states and 75232 transitions. [2021-02-19 17:24:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:24:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:25,825 INFO L225 Difference]: With dead ends: 30625 [2021-02-19 17:24:25,826 INFO L226 Difference]: Without dead ends: 30625 [2021-02-19 17:24:25,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:24:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30625 states. [2021-02-19 17:24:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30625 to 24655. [2021-02-19 17:24:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 24654 states have (on average 2.53281414780563) internal successors, (62444), 24654 states have internal predecessors, (62444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 62444 transitions. [2021-02-19 17:24:26,246 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 62444 transitions. Word has length 59 [2021-02-19 17:24:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:26,246 INFO L480 AbstractCegarLoop]: Abstraction has 24655 states and 62444 transitions. [2021-02-19 17:24:26,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 62444 transitions. [2021-02-19 17:24:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:26,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:26,262 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:26,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-02-19 17:24:26,463 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:26,463 INFO L82 PathProgramCache]: Analyzing trace with hash 601775751, now seen corresponding path program 271 times [2021-02-19 17:24:26,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:26,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251654702] [2021-02-19 17:24:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:26,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251654702] [2021-02-19 17:24:26,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606888805] [2021-02-19 17:24:26,730 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 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:26,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:26,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:26,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:26,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-02-19 17:24:26,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841538007] [2021-02-19 17:24:26,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:26,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:26,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:26,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:26,905 INFO L87 Difference]: Start difference. First operand 24655 states and 62444 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:27,334 INFO L93 Difference]: Finished difference Result 27590 states and 68291 transitions. [2021-02-19 17:24:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:24:27,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:27,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:27,368 INFO L225 Difference]: With dead ends: 27590 [2021-02-19 17:24:27,368 INFO L226 Difference]: Without dead ends: 27545 [2021-02-19 17:24:27,368 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27545 states. [2021-02-19 17:24:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27545 to 24655. [2021-02-19 17:24:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 24654 states have (on average 2.5324490954814634) internal successors, (62435), 24654 states have internal predecessors, (62435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 62435 transitions. [2021-02-19 17:24:27,765 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 62435 transitions. Word has length 59 [2021-02-19 17:24:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:27,765 INFO L480 AbstractCegarLoop]: Abstraction has 24655 states and 62435 transitions. [2021-02-19 17:24:27,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 62435 transitions. [2021-02-19 17:24:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:27,781 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:27,781 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:27,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable961,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:27,982 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:27,982 INFO L82 PathProgramCache]: Analyzing trace with hash 972677435, now seen corresponding path program 272 times [2021-02-19 17:24:27,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:27,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521228122] [2021-02-19 17:24:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:24:28,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521228122] [2021-02-19 17:24:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362606375] [2021-02-19 17:24:28,073 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 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:28,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:28,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:28,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:24:28,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:28,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 17:24:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115910172] [2021-02-19 17:24:28,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:24:28,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:24:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:24:28,242 INFO L87 Difference]: Start difference. First operand 24655 states and 62435 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:28,513 INFO L93 Difference]: Finished difference Result 28234 states and 69527 transitions. [2021-02-19 17:24:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:24:28,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:28,550 INFO L225 Difference]: With dead ends: 28234 [2021-02-19 17:24:28,550 INFO L226 Difference]: Without dead ends: 28231 [2021-02-19 17:24:28,551 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28231 states. [2021-02-19 17:24:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28231 to 24643. [2021-02-19 17:24:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24643 states, 24642 states have (on average 2.531775018261505) internal successors, (62388), 24642 states have internal predecessors, (62388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24643 states to 24643 states and 62388 transitions. [2021-02-19 17:24:28,946 INFO L78 Accepts]: Start accepts. Automaton has 24643 states and 62388 transitions. Word has length 59 [2021-02-19 17:24:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:28,946 INFO L480 AbstractCegarLoop]: Abstraction has 24643 states and 62388 transitions. [2021-02-19 17:24:28,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:28,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24643 states and 62388 transitions. [2021-02-19 17:24:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:28,965 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:28,965 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:29,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable968,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:29,165 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:29,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1179740001, now seen corresponding path program 273 times [2021-02-19 17:24:29,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:29,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307427517] [2021-02-19 17:24:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:24:29,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307427517] [2021-02-19 17:24:29,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646998861] [2021-02-19 17:24:29,275 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 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:29,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-02-19 17:24:29,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:24:29,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:29,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:24:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247803884] [2021-02-19 17:24:29,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:29,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:29,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:29,449 INFO L87 Difference]: Start difference. First operand 24643 states and 62388 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:29,816 INFO L93 Difference]: Finished difference Result 28258 states and 69529 transitions. [2021-02-19 17:24:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:24:29,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:29,853 INFO L225 Difference]: With dead ends: 28258 [2021-02-19 17:24:29,853 INFO L226 Difference]: Without dead ends: 28240 [2021-02-19 17:24:29,853 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28240 states. [2021-02-19 17:24:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28240 to 24649. [2021-02-19 17:24:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24649 states, 24648 states have (on average 2.530915287244401) internal successors, (62382), 24648 states have internal predecessors, (62382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24649 states to 24649 states and 62382 transitions. [2021-02-19 17:24:30,222 INFO L78 Accepts]: Start accepts. Automaton has 24649 states and 62382 transitions. Word has length 59 [2021-02-19 17:24:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:30,222 INFO L480 AbstractCegarLoop]: Abstraction has 24649 states and 62382 transitions. [2021-02-19 17:24:30,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 24649 states and 62382 transitions. [2021-02-19 17:24:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:30,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:30,237 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:30,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:30,438 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash -268260012, now seen corresponding path program 274 times [2021-02-19 17:24:30,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:30,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789065165] [2021-02-19 17:24:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:30,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789065165] [2021-02-19 17:24:30,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676571671] [2021-02-19 17:24:30,569 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 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:30,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:30,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:30,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:24:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829720444] [2021-02-19 17:24:30,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:30,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:30,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:30,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:30,779 INFO L87 Difference]: Start difference. First operand 24649 states and 62382 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:32,169 INFO L93 Difference]: Finished difference Result 26419 states and 65758 transitions. [2021-02-19 17:24:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:32,206 INFO L225 Difference]: With dead ends: 26419 [2021-02-19 17:24:32,207 INFO L226 Difference]: Without dead ends: 26130 [2021-02-19 17:24:32,207 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:32,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26130 states. [2021-02-19 17:24:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26130 to 24687. [2021-02-19 17:24:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 2.525561046747144) internal successors, (62346), 24686 states have internal predecessors, (62346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 62346 transitions. [2021-02-19 17:24:32,570 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 62346 transitions. Word has length 59 [2021-02-19 17:24:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:32,570 INFO L480 AbstractCegarLoop]: Abstraction has 24687 states and 62346 transitions. [2021-02-19 17:24:32,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 62346 transitions. [2021-02-19 17:24:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:32,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:32,586 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:32,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:32,787 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash -881796192, now seen corresponding path program 275 times [2021-02-19 17:24:32,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:32,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864156293] [2021-02-19 17:24:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:24:32,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864156293] [2021-02-19 17:24:32,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350791957] [2021-02-19 17:24:32,944 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 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:32,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-02-19 17:24:32,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:32,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:32,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:24:33,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:33,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:24:33,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624914659] [2021-02-19 17:24:33,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:33,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:33,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:33,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:33,122 INFO L87 Difference]: Start difference. First operand 24687 states and 62346 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:34,014 INFO L93 Difference]: Finished difference Result 26613 states and 66276 transitions. [2021-02-19 17:24:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:34,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:34,048 INFO L225 Difference]: With dead ends: 26613 [2021-02-19 17:24:34,049 INFO L226 Difference]: Without dead ends: 26547 [2021-02-19 17:24:34,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26547 states. [2021-02-19 17:24:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26547 to 24779. [2021-02-19 17:24:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24779 states, 24778 states have (on average 2.5258697231414966) internal successors, (62586), 24778 states have internal predecessors, (62586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24779 states to 24779 states and 62586 transitions. [2021-02-19 17:24:34,458 INFO L78 Accepts]: Start accepts. Automaton has 24779 states and 62586 transitions. Word has length 59 [2021-02-19 17:24:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:34,458 INFO L480 AbstractCegarLoop]: Abstraction has 24779 states and 62586 transitions. [2021-02-19 17:24:34,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 24779 states and 62586 transitions. [2021-02-19 17:24:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:34,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:34,475 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:34,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-02-19 17:24:34,676 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1039095679, now seen corresponding path program 148 times [2021-02-19 17:24:34,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:34,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030251696] [2021-02-19 17:24:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:34,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030251696] [2021-02-19 17:24:34,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17045041] [2021-02-19 17:24:34,783 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 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:34,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:34,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:34,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:34,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:34,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-02-19 17:24:34,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504062658] [2021-02-19 17:24:34,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:34,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:34,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:34,957 INFO L87 Difference]: Start difference. First operand 24779 states and 62586 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:35,373 INFO L93 Difference]: Finished difference Result 28587 states and 70241 transitions. [2021-02-19 17:24:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:24:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:35,411 INFO L225 Difference]: With dead ends: 28587 [2021-02-19 17:24:35,411 INFO L226 Difference]: Without dead ends: 28557 [2021-02-19 17:24:35,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28557 states. [2021-02-19 17:24:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28557 to 25280. [2021-02-19 17:24:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25280 states, 25279 states have (on average 2.5293326476522013) internal successors, (63939), 25279 states have internal predecessors, (63939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25280 states to 25280 states and 63939 transitions. [2021-02-19 17:24:35,810 INFO L78 Accepts]: Start accepts. Automaton has 25280 states and 63939 transitions. Word has length 59 [2021-02-19 17:24:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:35,810 INFO L480 AbstractCegarLoop]: Abstraction has 25280 states and 63939 transitions. [2021-02-19 17:24:35,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 25280 states and 63939 transitions. [2021-02-19 17:24:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:35,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:35,826 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:36,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:36,027 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1260121142, now seen corresponding path program 276 times [2021-02-19 17:24:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:36,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118344143] [2021-02-19 17:24:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118344143] [2021-02-19 17:24:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508750952] [2021-02-19 17:24:36,168 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 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:36,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-02-19 17:24:36,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:36,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:36,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:36,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:36,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197980279] [2021-02-19 17:24:36,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:36,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:36,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:36,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:36,347 INFO L87 Difference]: Start difference. First operand 25280 states and 63939 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:24:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:37,915 INFO L93 Difference]: Finished difference Result 29430 states and 72911 transitions. [2021-02-19 17:24:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:24:37,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 59 [2021-02-19 17:24:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:37,953 INFO L225 Difference]: With dead ends: 29430 [2021-02-19 17:24:37,954 INFO L226 Difference]: Without dead ends: 29376 [2021-02-19 17:24:37,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:24:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29376 states. [2021-02-19 17:24:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29376 to 25735. [2021-02-19 17:24:38,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25735 states, 25734 states have (on average 2.533263386958887) internal successors, (65191), 25734 states have internal predecessors, (65191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25735 states to 25735 states and 65191 transitions. [2021-02-19 17:24:38,353 INFO L78 Accepts]: Start accepts. Automaton has 25735 states and 65191 transitions. Word has length 59 [2021-02-19 17:24:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:38,353 INFO L480 AbstractCegarLoop]: Abstraction has 25735 states and 65191 transitions. [2021-02-19 17:24:38,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:24:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 25735 states and 65191 transitions. [2021-02-19 17:24:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:38,369 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:38,369 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:38,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable978,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:38,569 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1502287045, now seen corresponding path program 277 times [2021-02-19 17:24:38,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:38,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183171545] [2021-02-19 17:24:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:38,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183171545] [2021-02-19 17:24:38,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293952323] [2021-02-19 17:24:38,711 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 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:38,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:38,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:38,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:24:38,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238385380] [2021-02-19 17:24:38,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:38,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:38,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:38,892 INFO L87 Difference]: Start difference. First operand 25735 states and 65191 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:39,250 INFO L93 Difference]: Finished difference Result 29318 states and 72299 transitions. [2021-02-19 17:24:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:24:39,252 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:39,290 INFO L225 Difference]: With dead ends: 29318 [2021-02-19 17:24:39,290 INFO L226 Difference]: Without dead ends: 29294 [2021-02-19 17:24:39,290 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:39,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29294 states. [2021-02-19 17:24:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29294 to 25735. [2021-02-19 17:24:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25735 states, 25734 states have (on average 2.53252506411751) internal successors, (65172), 25734 states have internal predecessors, (65172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25735 states to 25735 states and 65172 transitions. [2021-02-19 17:24:39,704 INFO L78 Accepts]: Start accepts. Automaton has 25735 states and 65172 transitions. Word has length 59 [2021-02-19 17:24:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:39,704 INFO L480 AbstractCegarLoop]: Abstraction has 25735 states and 65172 transitions. [2021-02-19 17:24:39,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25735 states and 65172 transitions. [2021-02-19 17:24:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:39,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:39,721 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:39,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable979 [2021-02-19 17:24:39,921 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1414957676, now seen corresponding path program 278 times [2021-02-19 17:24:39,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:39,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798079562] [2021-02-19 17:24:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:40,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798079562] [2021-02-19 17:24:40,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544804524] [2021-02-19 17:24:40,087 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 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:40,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:40,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:40,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:40,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:40,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366490568] [2021-02-19 17:24:40,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:40,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:40,267 INFO L87 Difference]: Start difference. First operand 25735 states and 65172 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:24:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:42,278 INFO L93 Difference]: Finished difference Result 34728 states and 85132 transitions. [2021-02-19 17:24:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 17:24:42,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 59 [2021-02-19 17:24:42,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:42,324 INFO L225 Difference]: With dead ends: 34728 [2021-02-19 17:24:42,324 INFO L226 Difference]: Without dead ends: 34560 [2021-02-19 17:24:42,324 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 17:24:42,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34560 states. [2021-02-19 17:24:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34560 to 26600. [2021-02-19 17:24:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26600 states, 26599 states have (on average 2.538065340802286) internal successors, (67510), 26599 states have internal predecessors, (67510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26600 states to 26600 states and 67510 transitions. [2021-02-19 17:24:42,833 INFO L78 Accepts]: Start accepts. Automaton has 26600 states and 67510 transitions. Word has length 59 [2021-02-19 17:24:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:42,833 INFO L480 AbstractCegarLoop]: Abstraction has 26600 states and 67510 transitions. [2021-02-19 17:24:42,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:24:42,833 INFO L276 IsEmpty]: Start isEmpty. Operand 26600 states and 67510 transitions. [2021-02-19 17:24:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:42,850 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:42,850 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:43,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable983,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:43,050 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:43,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1801560353, now seen corresponding path program 279 times [2021-02-19 17:24:43,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:43,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934271617] [2021-02-19 17:24:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:43,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934271617] [2021-02-19 17:24:43,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585248839] [2021-02-19 17:24:43,205 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 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:43,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-02-19 17:24:43,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:43,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:43,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:43,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:24:43,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169404324] [2021-02-19 17:24:43,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:43,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:43,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:43,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:43,399 INFO L87 Difference]: Start difference. First operand 26600 states and 67510 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:43,904 INFO L93 Difference]: Finished difference Result 30353 states and 74938 transitions. [2021-02-19 17:24:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:24:43,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:43,947 INFO L225 Difference]: With dead ends: 30353 [2021-02-19 17:24:43,947 INFO L226 Difference]: Without dead ends: 30320 [2021-02-19 17:24:43,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:24:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30320 states. [2021-02-19 17:24:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30320 to 26600. [2021-02-19 17:24:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26600 states, 26599 states have (on average 2.537501409827437) internal successors, (67495), 26599 states have internal predecessors, (67495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26600 states to 26600 states and 67495 transitions. [2021-02-19 17:24:44,396 INFO L78 Accepts]: Start accepts. Automaton has 26600 states and 67495 transitions. Word has length 59 [2021-02-19 17:24:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:44,396 INFO L480 AbstractCegarLoop]: Abstraction has 26600 states and 67495 transitions. [2021-02-19 17:24:44,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26600 states and 67495 transitions. [2021-02-19 17:24:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:44,413 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:44,414 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:44,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-02-19 17:24:44,614 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:44,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:44,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1355266166, now seen corresponding path program 280 times [2021-02-19 17:24:44,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:44,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785707340] [2021-02-19 17:24:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:44,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785707340] [2021-02-19 17:24:44,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549398349] [2021-02-19 17:24:44,800 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 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:44,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:44,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:44,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:44,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:24:44,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046742175] [2021-02-19 17:24:44,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:44,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:44,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:44,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:44,982 INFO L87 Difference]: Start difference. First operand 26600 states and 67495 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) [2021-02-19 17:24:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:47,729 INFO L93 Difference]: Finished difference Result 46139 states and 111536 transitions. [2021-02-19 17:24:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 17:24:47,730 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 59 [2021-02-19 17:24:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:47,789 INFO L225 Difference]: With dead ends: 46139 [2021-02-19 17:24:47,789 INFO L226 Difference]: Without dead ends: 45617 [2021-02-19 17:24:47,790 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 17:24:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45617 states. [2021-02-19 17:24:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45617 to 27973. [2021-02-19 17:24:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27973 states, 27972 states have (on average 2.5446875446875445) internal successors, (71180), 27972 states have internal predecessors, (71180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27973 states to 27973 states and 71180 transitions. [2021-02-19 17:24:48,446 INFO L78 Accepts]: Start accepts. Automaton has 27973 states and 71180 transitions. Word has length 59 [2021-02-19 17:24:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:48,446 INFO L480 AbstractCegarLoop]: Abstraction has 27973 states and 71180 transitions. [2021-02-19 17:24:48,446 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) [2021-02-19 17:24:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 27973 states and 71180 transitions. [2021-02-19 17:24:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:48,465 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:48,465 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:48,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable989,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:48,665 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:48,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:48,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1046128261, now seen corresponding path program 281 times [2021-02-19 17:24:48,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:48,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623231010] [2021-02-19 17:24:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:48,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623231010] [2021-02-19 17:24:48,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046684917] [2021-02-19 17:24:48,837 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 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:48,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 17:24:48,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:48,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:48,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:49,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:49,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-02-19 17:24:49,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180046284] [2021-02-19 17:24:49,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:24:49,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:49,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:24:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:24:49,051 INFO L87 Difference]: Start difference. First operand 27973 states and 71180 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:49,575 INFO L93 Difference]: Finished difference Result 32121 states and 79394 transitions. [2021-02-19 17:24:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:24:49,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:49,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:49,620 INFO L225 Difference]: With dead ends: 32121 [2021-02-19 17:24:49,621 INFO L226 Difference]: Without dead ends: 32079 [2021-02-19 17:24:49,621 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32079 states. [2021-02-19 17:24:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32079 to 27973. [2021-02-19 17:24:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27973 states, 27972 states have (on average 2.5441512941512943) internal successors, (71165), 27972 states have internal predecessors, (71165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27973 states to 27973 states and 71165 transitions. [2021-02-19 17:24:50,088 INFO L78 Accepts]: Start accepts. Automaton has 27973 states and 71165 transitions. Word has length 59 [2021-02-19 17:24:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:50,088 INFO L480 AbstractCegarLoop]: Abstraction has 27973 states and 71165 transitions. [2021-02-19 17:24:50,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 27973 states and 71165 transitions. [2021-02-19 17:24:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:50,106 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:50,106 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:50,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable990 [2021-02-19 17:24:50,307 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:50,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1201952300, now seen corresponding path program 282 times [2021-02-19 17:24:50,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:50,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124009929] [2021-02-19 17:24:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:50,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124009929] [2021-02-19 17:24:50,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154233363] [2021-02-19 17:24:50,518 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 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:50,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-02-19 17:24:50,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:50,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:50,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:24:50,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694011039] [2021-02-19 17:24:50,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:50,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:50,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:50,708 INFO L87 Difference]: Start difference. First operand 27973 states and 71165 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) [2021-02-19 17:24:55,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:55,031 INFO L93 Difference]: Finished difference Result 56223 states and 135710 transitions. [2021-02-19 17:24:55,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-02-19 17:24:55,033 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 59 [2021-02-19 17:24:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:55,117 INFO L225 Difference]: With dead ends: 56223 [2021-02-19 17:24:55,117 INFO L226 Difference]: Without dead ends: 55605 [2021-02-19 17:24:55,119 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2021-02-19 17:24:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55605 states. [2021-02-19 17:24:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55605 to 29239. [2021-02-19 17:24:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29239 states, 29238 states have (on average 2.5499008140091663) internal successors, (74554), 29238 states have internal predecessors, (74554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29239 states to 29239 states and 74554 transitions. [2021-02-19 17:24:55,805 INFO L78 Accepts]: Start accepts. Automaton has 29239 states and 74554 transitions. Word has length 59 [2021-02-19 17:24:55,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:55,805 INFO L480 AbstractCegarLoop]: Abstraction has 29239 states and 74554 transitions. [2021-02-19 17:24:55,805 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) [2021-02-19 17:24:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 29239 states and 74554 transitions. [2021-02-19 17:24:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:55,823 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:55,823 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:56,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable996,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:56,024 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:56,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1951369953, now seen corresponding path program 283 times [2021-02-19 17:24:56,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:56,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600172437] [2021-02-19 17:24:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:56,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600172437] [2021-02-19 17:24:56,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104460310] [2021-02-19 17:24:56,194 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 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:24:56,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:56,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:56,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-02-19 17:24:56,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471072994] [2021-02-19 17:24:56,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:56,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:56,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:56,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:56,374 INFO L87 Difference]: Start difference. First operand 29239 states and 74554 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:56,847 INFO L93 Difference]: Finished difference Result 33382 states and 82731 transitions. [2021-02-19 17:24:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:24:56,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:24:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:56,897 INFO L225 Difference]: With dead ends: 33382 [2021-02-19 17:24:56,897 INFO L226 Difference]: Without dead ends: 33331 [2021-02-19 17:24:56,897 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33331 states. [2021-02-19 17:24:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33331 to 28908. [2021-02-19 17:24:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28908 states, 28907 states have (on average 2.547652817656623) internal successors, (73645), 28907 states have internal predecessors, (73645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28908 states to 28908 states and 73645 transitions. [2021-02-19 17:24:57,358 INFO L78 Accepts]: Start accepts. Automaton has 28908 states and 73645 transitions. Word has length 59 [2021-02-19 17:24:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:57,358 INFO L480 AbstractCegarLoop]: Abstraction has 28908 states and 73645 transitions. [2021-02-19 17:24:57,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 28908 states and 73645 transitions. [2021-02-19 17:24:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:24:57,374 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:57,375 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:57,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-02-19 17:24:57,575 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash -621194058, now seen corresponding path program 284 times [2021-02-19 17:24:57,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:57,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260389847] [2021-02-19 17:24:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:57,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260389847] [2021-02-19 17:24:57,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259199201] [2021-02-19 17:24:57,788 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 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:57,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:57,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:24:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:57,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:57,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:24:57,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563709499] [2021-02-19 17:24:57,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:24:57,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:24:57,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:57,970 INFO L87 Difference]: Start difference. First operand 28908 states and 73645 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) [2021-02-19 17:24:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:59,648 INFO L93 Difference]: Finished difference Result 37977 states and 91946 transitions. [2021-02-19 17:24:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:24:59,650 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 59 [2021-02-19 17:24:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:59,693 INFO L225 Difference]: With dead ends: 37977 [2021-02-19 17:24:59,694 INFO L226 Difference]: Without dead ends: 37137 [2021-02-19 17:24:59,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:24:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37137 states. [2021-02-19 17:25:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37137 to 24839. [2021-02-19 17:25:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24839 states, 24838 states have (on average 2.519204444802319) internal successors, (62572), 24838 states have internal predecessors, (62572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24839 states to 24839 states and 62572 transitions. [2021-02-19 17:25:00,230 INFO L78 Accepts]: Start accepts. Automaton has 24839 states and 62572 transitions. Word has length 59 [2021-02-19 17:25:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:00,230 INFO L480 AbstractCegarLoop]: Abstraction has 24839 states and 62572 transitions. [2021-02-19 17:25:00,230 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) [2021-02-19 17:25:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 24839 states and 62572 transitions. [2021-02-19 17:25:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:00,245 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:00,245 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:00,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1004,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:00,446 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1481135985, now seen corresponding path program 149 times [2021-02-19 17:25:00,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:00,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252466336] [2021-02-19 17:25:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:00,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252466336] [2021-02-19 17:25:00,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544862457] [2021-02-19 17:25:00,557 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 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:00,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-02-19 17:25:00,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:00,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:00,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:00,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-02-19 17:25:00,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012672638] [2021-02-19 17:25:00,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:00,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:00,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:00,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:00,765 INFO L87 Difference]: Start difference. First operand 24839 states and 62572 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:01,383 INFO L93 Difference]: Finished difference Result 35806 states and 87025 transitions. [2021-02-19 17:25:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:25:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:01,431 INFO L225 Difference]: With dead ends: 35806 [2021-02-19 17:25:01,431 INFO L226 Difference]: Without dead ends: 35806 [2021-02-19 17:25:01,431 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:25:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35806 states. [2021-02-19 17:25:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35806 to 24980. [2021-02-19 17:25:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24980 states, 24979 states have (on average 2.5217182433243925) internal successors, (62990), 24979 states have internal predecessors, (62990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24980 states to 24980 states and 62990 transitions. [2021-02-19 17:25:01,852 INFO L78 Accepts]: Start accepts. Automaton has 24980 states and 62990 transitions. Word has length 59 [2021-02-19 17:25:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:01,852 INFO L480 AbstractCegarLoop]: Abstraction has 24980 states and 62990 transitions. [2021-02-19 17:25:01,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 24980 states and 62990 transitions. [2021-02-19 17:25:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:01,869 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:01,869 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:02,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1005 [2021-02-19 17:25:02,074 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1176258855, now seen corresponding path program 150 times [2021-02-19 17:25:02,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:02,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069367748] [2021-02-19 17:25:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:02,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069367748] [2021-02-19 17:25:02,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117447120] [2021-02-19 17:25:02,234 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 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:02,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-02-19 17:25:02,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:02,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:02,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-02-19 17:25:02,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334126611] [2021-02-19 17:25:02,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:02,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:02,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:02,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:02,444 INFO L87 Difference]: Start difference. First operand 24980 states and 62990 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:03,094 INFO L93 Difference]: Finished difference Result 39544 states and 95942 transitions. [2021-02-19 17:25:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:25:03,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:03,144 INFO L225 Difference]: With dead ends: 39544 [2021-02-19 17:25:03,145 INFO L226 Difference]: Without dead ends: 39544 [2021-02-19 17:25:03,145 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:25:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39544 states. [2021-02-19 17:25:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39544 to 25022. [2021-02-19 17:25:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 2.5225210822908757) internal successors, (63116), 25021 states have internal predecessors, (63116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 63116 transitions. [2021-02-19 17:25:03,618 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 63116 transitions. Word has length 59 [2021-02-19 17:25:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:03,619 INFO L480 AbstractCegarLoop]: Abstraction has 25022 states and 63116 transitions. [2021-02-19 17:25:03,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 63116 transitions. [2021-02-19 17:25:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:03,635 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:03,635 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:03,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1006,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:03,835 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash -513736309, now seen corresponding path program 151 times [2021-02-19 17:25:03,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:03,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040087636] [2021-02-19 17:25:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:04,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040087636] [2021-02-19 17:25:04,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998483974] [2021-02-19 17:25:04,013 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 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:04,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:04,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:04,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-02-19 17:25:04,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393172251] [2021-02-19 17:25:04,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:04,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:04,234 INFO L87 Difference]: Start difference. First operand 25022 states and 63116 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:05,062 INFO L93 Difference]: Finished difference Result 40570 states and 98446 transitions. [2021-02-19 17:25:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:05,120 INFO L225 Difference]: With dead ends: 40570 [2021-02-19 17:25:05,120 INFO L226 Difference]: Without dead ends: 40570 [2021-02-19 17:25:05,120 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:25:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40570 states. [2021-02-19 17:25:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40570 to 25073. [2021-02-19 17:25:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25073 states, 25072 states have (on average 2.523492342054882) internal successors, (63269), 25072 states have internal predecessors, (63269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 63269 transitions. [2021-02-19 17:25:05,648 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 63269 transitions. Word has length 59 [2021-02-19 17:25:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:05,648 INFO L480 AbstractCegarLoop]: Abstraction has 25073 states and 63269 transitions. [2021-02-19 17:25:05,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 63269 transitions. [2021-02-19 17:25:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:05,666 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:05,666 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:05,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1007 [2021-02-19 17:25:05,866 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:05,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1553023321, now seen corresponding path program 152 times [2021-02-19 17:25:05,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:05,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850780058] [2021-02-19 17:25:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:06,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850780058] [2021-02-19 17:25:06,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684136115] [2021-02-19 17:25:06,066 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 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:06,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:06,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:06,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:06,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 122 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:06,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:06,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-02-19 17:25:06,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797855071] [2021-02-19 17:25:06,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:06,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:06,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:06,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:06,280 INFO L87 Difference]: Start difference. First operand 25073 states and 63269 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:07,134 INFO L93 Difference]: Finished difference Result 38992 states and 94758 transitions. [2021-02-19 17:25:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:07,185 INFO L225 Difference]: With dead ends: 38992 [2021-02-19 17:25:07,185 INFO L226 Difference]: Without dead ends: 38992 [2021-02-19 17:25:07,185 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:25:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38992 states. [2021-02-19 17:25:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38992 to 25113. [2021-02-19 17:25:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25113 states, 25112 states have (on average 2.5243309971328447) internal successors, (63391), 25112 states have internal predecessors, (63391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25113 states to 25113 states and 63391 transitions. [2021-02-19 17:25:07,660 INFO L78 Accepts]: Start accepts. Automaton has 25113 states and 63391 transitions. Word has length 59 [2021-02-19 17:25:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:07,660 INFO L480 AbstractCegarLoop]: Abstraction has 25113 states and 63391 transitions. [2021-02-19 17:25:07,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 25113 states and 63391 transitions. [2021-02-19 17:25:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:07,675 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:07,675 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:07,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1008,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:07,875 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash -533160949, now seen corresponding path program 153 times [2021-02-19 17:25:07,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:07,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917084424] [2021-02-19 17:25:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:08,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917084424] [2021-02-19 17:25:08,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350971228] [2021-02-19 17:25:08,072 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 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:08,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-02-19 17:25:08,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:25:08,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:08,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:08,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-02-19 17:25:08,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961916557] [2021-02-19 17:25:08,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:25:08,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:25:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:25:08,375 INFO L87 Difference]: Start difference. First operand 25113 states and 63391 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:09,072 INFO L93 Difference]: Finished difference Result 28405 states and 69624 transitions. [2021-02-19 17:25:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:25:09,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:09,109 INFO L225 Difference]: With dead ends: 28405 [2021-02-19 17:25:09,109 INFO L226 Difference]: Without dead ends: 28405 [2021-02-19 17:25:09,110 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:25:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28405 states. [2021-02-19 17:25:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28405 to 24497. [2021-02-19 17:25:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24497 states, 24496 states have (on average 2.5198807968647943) internal successors, (61727), 24496 states have internal predecessors, (61727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24497 states to 24497 states and 61727 transitions. [2021-02-19 17:25:09,469 INFO L78 Accepts]: Start accepts. Automaton has 24497 states and 61727 transitions. Word has length 59 [2021-02-19 17:25:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:09,469 INFO L480 AbstractCegarLoop]: Abstraction has 24497 states and 61727 transitions. [2021-02-19 17:25:09,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24497 states and 61727 transitions. [2021-02-19 17:25:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:09,485 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:09,485 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:09,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1009 [2021-02-19 17:25:09,686 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:09,686 INFO L82 PathProgramCache]: Analyzing trace with hash -539355205, now seen corresponding path program 285 times [2021-02-19 17:25:09,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:09,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837088163] [2021-02-19 17:25:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837088163] [2021-02-19 17:25:09,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564067338] [2021-02-19 17:25:09,888 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 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:09,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:25:09,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:10,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:10,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-02-19 17:25:10,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346719690] [2021-02-19 17:25:10,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:10,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:10,078 INFO L87 Difference]: Start difference. First operand 24497 states and 61727 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:10,826 INFO L93 Difference]: Finished difference Result 27673 states and 68086 transitions. [2021-02-19 17:25:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:25:10,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:10,866 INFO L225 Difference]: With dead ends: 27673 [2021-02-19 17:25:10,866 INFO L226 Difference]: Without dead ends: 27619 [2021-02-19 17:25:10,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:25:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27619 states. [2021-02-19 17:25:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27619 to 24497. [2021-02-19 17:25:11,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24497 states, 24496 states have (on average 2.519268451992162) internal successors, (61712), 24496 states have internal predecessors, (61712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24497 states to 24497 states and 61712 transitions. [2021-02-19 17:25:11,282 INFO L78 Accepts]: Start accepts. Automaton has 24497 states and 61712 transitions. Word has length 59 [2021-02-19 17:25:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:11,282 INFO L480 AbstractCegarLoop]: Abstraction has 24497 states and 61712 transitions. [2021-02-19 17:25:11,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 24497 states and 61712 transitions. [2021-02-19 17:25:11,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:11,300 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:11,300 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:11,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-02-19 17:25:11,506 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:11,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1196579078, now seen corresponding path program 154 times [2021-02-19 17:25:11,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:11,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542649096] [2021-02-19 17:25:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:11,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542649096] [2021-02-19 17:25:11,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869339623] [2021-02-19 17:25:11,659 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 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:11,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:11,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:11,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:25:11,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:11,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:11,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:25:11,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028429270] [2021-02-19 17:25:11,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:25:11,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:11,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:25:11,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:25:11,846 INFO L87 Difference]: Start difference. First operand 24497 states and 61712 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:12,835 INFO L93 Difference]: Finished difference Result 25955 states and 64681 transitions. [2021-02-19 17:25:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:25:12,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:12,868 INFO L225 Difference]: With dead ends: 25955 [2021-02-19 17:25:12,868 INFO L226 Difference]: Without dead ends: 25938 [2021-02-19 17:25:12,868 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:25:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25938 states. [2021-02-19 17:25:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25938 to 24664. [2021-02-19 17:25:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24664 states, 24663 states have (on average 2.5176580302477394) internal successors, (62093), 24663 states have internal predecessors, (62093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24664 states to 24664 states and 62093 transitions. [2021-02-19 17:25:13,241 INFO L78 Accepts]: Start accepts. Automaton has 24664 states and 62093 transitions. Word has length 59 [2021-02-19 17:25:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:13,241 INFO L480 AbstractCegarLoop]: Abstraction has 24664 states and 62093 transitions. [2021-02-19 17:25:13,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24664 states and 62093 transitions. [2021-02-19 17:25:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:13,258 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:13,258 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:13,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1020,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:13,459 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:13,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1751753927, now seen corresponding path program 286 times [2021-02-19 17:25:13,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:13,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376188391] [2021-02-19 17:25:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:25:13,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376188391] [2021-02-19 17:25:13,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7206256] [2021-02-19 17:25:13,574 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 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:13,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:13,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:13,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:25:13,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:13,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-02-19 17:25:13,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478871430] [2021-02-19 17:25:13,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:25:13,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:25:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:25:13,751 INFO L87 Difference]: Start difference. First operand 24664 states and 62093 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:14,075 INFO L93 Difference]: Finished difference Result 28157 states and 69065 transitions. [2021-02-19 17:25:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:25:14,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:14,112 INFO L225 Difference]: With dead ends: 28157 [2021-02-19 17:25:14,113 INFO L226 Difference]: Without dead ends: 28139 [2021-02-19 17:25:14,113 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28139 states. [2021-02-19 17:25:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28139 to 24664. [2021-02-19 17:25:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24664 states, 24663 states have (on average 2.5169281920285447) internal successors, (62075), 24663 states have internal predecessors, (62075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24664 states to 24664 states and 62075 transitions. [2021-02-19 17:25:14,507 INFO L78 Accepts]: Start accepts. Automaton has 24664 states and 62075 transitions. Word has length 59 [2021-02-19 17:25:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:14,508 INFO L480 AbstractCegarLoop]: Abstraction has 24664 states and 62075 transitions. [2021-02-19 17:25:14,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 24664 states and 62075 transitions. [2021-02-19 17:25:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:14,523 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:14,523 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:14,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:14,723 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash 303753914, now seen corresponding path program 287 times [2021-02-19 17:25:14,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:14,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892853314] [2021-02-19 17:25:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:14,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892853314] [2021-02-19 17:25:14,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096065537] [2021-02-19 17:25:14,862 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 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:14,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-02-19 17:25:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:14,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:25:14,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:15,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:15,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:25:15,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230776481] [2021-02-19 17:25:15,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:25:15,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:15,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:25:15,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:25:15,068 INFO L87 Difference]: Start difference. First operand 24664 states and 62075 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:16,572 INFO L93 Difference]: Finished difference Result 25564 states and 63737 transitions. [2021-02-19 17:25:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:25:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:16,605 INFO L225 Difference]: With dead ends: 25564 [2021-02-19 17:25:16,605 INFO L226 Difference]: Without dead ends: 25434 [2021-02-19 17:25:16,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:25:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-02-19 17:25:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 24585. [2021-02-19 17:25:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24585 states, 24584 states have (on average 2.5149284087211194) internal successors, (61827), 24584 states have internal predecessors, (61827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24585 states to 24585 states and 61827 transitions. [2021-02-19 17:25:16,944 INFO L78 Accepts]: Start accepts. Automaton has 24585 states and 61827 transitions. Word has length 59 [2021-02-19 17:25:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:16,944 INFO L480 AbstractCegarLoop]: Abstraction has 24585 states and 61827 transitions. [2021-02-19 17:25:16,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 24585 states and 61827 transitions. [2021-02-19 17:25:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:16,958 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:16,958 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:17,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-02-19 17:25:17,158 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:17,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash -309782266, now seen corresponding path program 288 times [2021-02-19 17:25:17,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:17,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848694519] [2021-02-19 17:25:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:25:17,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848694519] [2021-02-19 17:25:17,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102157291] [2021-02-19 17:25:17,313 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 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:17,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-02-19 17:25:17,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:25:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:17,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-02-19 17:25:17,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-02-19 17:25:17,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:25:17,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:25:17,767 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-02-19 17:25:17,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:25:17,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-02-19 17:25:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 66 proven. 109 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:17,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:17,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-02-19 17:25:17,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041864146] [2021-02-19 17:25:17,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:25:17,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:17,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:25:17,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:25:17,824 INFO L87 Difference]: Start difference. First operand 24585 states and 61827 transitions. Second operand has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:22,028 INFO L93 Difference]: Finished difference Result 37850 states and 90778 transitions. [2021-02-19 17:25:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-02-19 17:25:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:22,078 INFO L225 Difference]: With dead ends: 37850 [2021-02-19 17:25:22,078 INFO L226 Difference]: Without dead ends: 37727 [2021-02-19 17:25:22,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3186 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1354, Invalid=7958, Unknown=0, NotChecked=0, Total=9312 [2021-02-19 17:25:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37727 states. [2021-02-19 17:25:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37727 to 25378. [2021-02-19 17:25:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25378 states, 25377 states have (on average 2.5165701225519173) internal successors, (63863), 25377 states have internal predecessors, (63863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25378 states to 25378 states and 63863 transitions. [2021-02-19 17:25:22,524 INFO L78 Accepts]: Start accepts. Automaton has 25378 states and 63863 transitions. Word has length 59 [2021-02-19 17:25:22,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:22,524 INFO L480 AbstractCegarLoop]: Abstraction has 25378 states and 63863 transitions. [2021-02-19 17:25:22,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.541666666666667) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:22,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25378 states and 63863 transitions. [2021-02-19 17:25:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:22,539 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:22,539 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:22,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1025,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:22,739 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:22,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1832135068, now seen corresponding path program 289 times [2021-02-19 17:25:22,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:22,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918251225] [2021-02-19 17:25:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:22,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918251225] [2021-02-19 17:25:22,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925890930] [2021-02-19 17:25:22,934 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 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:22,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:25:22,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:23,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:23,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:25:23,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368386036] [2021-02-19 17:25:23,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:25:23,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:23,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:25:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:25:23,149 INFO L87 Difference]: Start difference. First operand 25378 states and 63863 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:25:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:24,611 INFO L93 Difference]: Finished difference Result 29088 states and 71830 transitions. [2021-02-19 17:25:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:25:24,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 59 [2021-02-19 17:25:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:24,648 INFO L225 Difference]: With dead ends: 29088 [2021-02-19 17:25:24,649 INFO L226 Difference]: Without dead ends: 29034 [2021-02-19 17:25:24,649 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:25:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29034 states. [2021-02-19 17:25:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29034 to 25785. [2021-02-19 17:25:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25785 states, 25784 states have (on average 2.52012876202296) internal successors, (64979), 25784 states have internal predecessors, (64979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25785 states to 25785 states and 64979 transitions. [2021-02-19 17:25:25,080 INFO L78 Accepts]: Start accepts. Automaton has 25785 states and 64979 transitions. Word has length 59 [2021-02-19 17:25:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:25,080 INFO L480 AbstractCegarLoop]: Abstraction has 25785 states and 64979 transitions. [2021-02-19 17:25:25,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-02-19 17:25:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 25785 states and 64979 transitions. [2021-02-19 17:25:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:25,098 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:25,098 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:25,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-02-19 17:25:25,298 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:25,298 INFO L82 PathProgramCache]: Analyzing trace with hash -930273119, now seen corresponding path program 290 times [2021-02-19 17:25:25,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:25,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767591799] [2021-02-19 17:25:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:25,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767591799] [2021-02-19 17:25:25,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628951425] [2021-02-19 17:25:25,431 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 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:25,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:25,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:25,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:25,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:25,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:25,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 17:25:25,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44300179] [2021-02-19 17:25:25,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:25:25,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:25,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:25:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:25:25,625 INFO L87 Difference]: Start difference. First operand 25785 states and 64979 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:25,994 INFO L93 Difference]: Finished difference Result 29512 states and 72476 transitions. [2021-02-19 17:25:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:25:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:26,038 INFO L225 Difference]: With dead ends: 29512 [2021-02-19 17:25:26,038 INFO L226 Difference]: Without dead ends: 29488 [2021-02-19 17:25:26,038 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29488 states. [2021-02-19 17:25:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29488 to 25781. [2021-02-19 17:25:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25781 states, 25780 states have (on average 2.519511249030256) internal successors, (64953), 25780 states have internal predecessors, (64953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:26,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25781 states to 25781 states and 64953 transitions. [2021-02-19 17:25:26,442 INFO L78 Accepts]: Start accepts. Automaton has 25781 states and 64953 transitions. Word has length 59 [2021-02-19 17:25:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:26,442 INFO L480 AbstractCegarLoop]: Abstraction has 25781 states and 64953 transitions. [2021-02-19 17:25:26,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 25781 states and 64953 transitions. [2021-02-19 17:25:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:26,456 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:26,457 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:26,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1027,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:26,657 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1986971602, now seen corresponding path program 291 times [2021-02-19 17:25:26,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:26,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709519656] [2021-02-19 17:25:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:26,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709519656] [2021-02-19 17:25:26,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387972307] [2021-02-19 17:25:26,826 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 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:26,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 17:25:26,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:26,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:25:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:27,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:27,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:25:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319039558] [2021-02-19 17:25:27,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:27,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:27,018 INFO L87 Difference]: Start difference. First operand 25781 states and 64953 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:25:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:29,473 INFO L93 Difference]: Finished difference Result 33993 states and 83029 transitions. [2021-02-19 17:25:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 17:25:29,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 59 [2021-02-19 17:25:29,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:29,517 INFO L225 Difference]: With dead ends: 33993 [2021-02-19 17:25:29,517 INFO L226 Difference]: Without dead ends: 33825 [2021-02-19 17:25:29,518 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 17:25:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33825 states. [2021-02-19 17:25:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33825 to 26608. [2021-02-19 17:25:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26608 states, 26607 states have (on average 2.5243732852256926) internal successors, (67166), 26607 states have internal predecessors, (67166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26608 states to 26608 states and 67166 transitions. [2021-02-19 17:25:29,998 INFO L78 Accepts]: Start accepts. Automaton has 26608 states and 67166 transitions. Word has length 59 [2021-02-19 17:25:29,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:29,998 INFO L480 AbstractCegarLoop]: Abstraction has 26608 states and 67166 transitions. [2021-02-19 17:25:29,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-02-19 17:25:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 26608 states and 67166 transitions. [2021-02-19 17:25:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:30,014 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:30,014 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:30,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:30,215 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:30,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1921393017, now seen corresponding path program 292 times [2021-02-19 17:25:30,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:30,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257098135] [2021-02-19 17:25:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:30,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257098135] [2021-02-19 17:25:30,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081351266] [2021-02-19 17:25:30,393 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 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:30,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:30,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:30,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:30,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:30,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-02-19 17:25:30,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64801671] [2021-02-19 17:25:30,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:30,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:30,615 INFO L87 Difference]: Start difference. First operand 26608 states and 67166 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:31,050 INFO L93 Difference]: Finished difference Result 30548 states and 75068 transitions. [2021-02-19 17:25:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:25:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:31,094 INFO L225 Difference]: With dead ends: 30548 [2021-02-19 17:25:31,094 INFO L226 Difference]: Without dead ends: 30515 [2021-02-19 17:25:31,094 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30515 states. [2021-02-19 17:25:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30515 to 26608. [2021-02-19 17:25:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26608 states, 26607 states have (on average 2.5240350283759914) internal successors, (67157), 26607 states have internal predecessors, (67157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26608 states to 26608 states and 67157 transitions. [2021-02-19 17:25:31,531 INFO L78 Accepts]: Start accepts. Automaton has 26608 states and 67157 transitions. Word has length 59 [2021-02-19 17:25:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:31,531 INFO L480 AbstractCegarLoop]: Abstraction has 26608 states and 67157 transitions. [2021-02-19 17:25:31,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 26608 states and 67157 transitions. [2021-02-19 17:25:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:31,547 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:31,547 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:31,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:31,748 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1927280092, now seen corresponding path program 293 times [2021-02-19 17:25:31,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:31,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047278246] [2021-02-19 17:25:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:31,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047278246] [2021-02-19 17:25:31,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007006878] [2021-02-19 17:25:31,968 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 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:31,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-02-19 17:25:31,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:25:31,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:32,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:32,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:25:32,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916449298] [2021-02-19 17:25:32,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:32,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:32,227 INFO L87 Difference]: Start difference. First operand 26608 states and 67157 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) [2021-02-19 17:25:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:35,771 INFO L93 Difference]: Finished difference Result 44488 states and 107152 transitions. [2021-02-19 17:25:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-02-19 17:25:35,773 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 59 [2021-02-19 17:25:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:35,836 INFO L225 Difference]: With dead ends: 44488 [2021-02-19 17:25:35,836 INFO L226 Difference]: Without dead ends: 44032 [2021-02-19 17:25:35,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2021-02-19 17:25:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44032 states. [2021-02-19 17:25:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44032 to 28046. [2021-02-19 17:25:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28046 states, 28045 states have (on average 2.530611517204493) internal successors, (70971), 28045 states have internal predecessors, (70971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28046 states to 28046 states and 70971 transitions. [2021-02-19 17:25:36,445 INFO L78 Accepts]: Start accepts. Automaton has 28046 states and 70971 transitions. Word has length 59 [2021-02-19 17:25:36,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:36,445 INFO L480 AbstractCegarLoop]: Abstraction has 28046 states and 70971 transitions. [2021-02-19 17:25:36,445 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) [2021-02-19 17:25:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 28046 states and 70971 transitions. [2021-02-19 17:25:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:36,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:36,460 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:36,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1037,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:36,661 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:36,661 INFO L82 PathProgramCache]: Analyzing trace with hash -474114335, now seen corresponding path program 294 times [2021-02-19 17:25:36,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:36,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558561746] [2021-02-19 17:25:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:36,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558561746] [2021-02-19 17:25:36,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372955975] [2021-02-19 17:25:36,828 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 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:36,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-02-19 17:25:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:37,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:37,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-02-19 17:25:37,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549647168] [2021-02-19 17:25:37,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:37,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:37,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:37,046 INFO L87 Difference]: Start difference. First operand 28046 states and 70971 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:37,503 INFO L93 Difference]: Finished difference Result 32348 states and 79562 transitions. [2021-02-19 17:25:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:25:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:37,542 INFO L225 Difference]: With dead ends: 32348 [2021-02-19 17:25:37,542 INFO L226 Difference]: Without dead ends: 32306 [2021-02-19 17:25:37,542 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:25:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32306 states. [2021-02-19 17:25:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32306 to 28046. [2021-02-19 17:25:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28046 states, 28045 states have (on average 2.5302906043858084) internal successors, (70962), 28045 states have internal predecessors, (70962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28046 states to 28046 states and 70962 transitions. [2021-02-19 17:25:38,013 INFO L78 Accepts]: Start accepts. Automaton has 28046 states and 70962 transitions. Word has length 59 [2021-02-19 17:25:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:38,013 INFO L480 AbstractCegarLoop]: Abstraction has 28046 states and 70962 transitions. [2021-02-19 17:25:38,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 28046 states and 70962 transitions. [2021-02-19 17:25:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:38,031 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:38,031 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:38,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1038 [2021-02-19 17:25:38,232 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966226, now seen corresponding path program 295 times [2021-02-19 17:25:38,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:38,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36811668] [2021-02-19 17:25:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:38,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36811668] [2021-02-19 17:25:38,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618131135] [2021-02-19 17:25:38,433 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 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:38,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:25:38,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:38,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:38,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:25:38,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501484738] [2021-02-19 17:25:38,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:38,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:38,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:38,622 INFO L87 Difference]: Start difference. First operand 28046 states and 70962 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) [2021-02-19 17:25:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:44,371 INFO L93 Difference]: Finished difference Result 68430 states and 161683 transitions. [2021-02-19 17:25:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-02-19 17:25:44,372 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 59 [2021-02-19 17:25:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:44,453 INFO L225 Difference]: With dead ends: 68430 [2021-02-19 17:25:44,454 INFO L226 Difference]: Without dead ends: 67044 [2021-02-19 17:25:44,454 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-02-19 17:25:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67044 states. [2021-02-19 17:25:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67044 to 30259. [2021-02-19 17:25:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30259 states, 30258 states have (on average 2.539196245620993) internal successors, (76831), 30258 states have internal predecessors, (76831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30259 states to 30259 states and 76831 transitions. [2021-02-19 17:25:45,149 INFO L78 Accepts]: Start accepts. Automaton has 30259 states and 76831 transitions. Word has length 59 [2021-02-19 17:25:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:45,149 INFO L480 AbstractCegarLoop]: Abstraction has 30259 states and 76831 transitions. [2021-02-19 17:25:45,149 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) [2021-02-19 17:25:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30259 states and 76831 transitions. [2021-02-19 17:25:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:45,164 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:45,164 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:45,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1044 [2021-02-19 17:25:45,365 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:45,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583417, now seen corresponding path program 296 times [2021-02-19 17:25:45,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:45,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331432219] [2021-02-19 17:25:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:45,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331432219] [2021-02-19 17:25:45,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051402571] [2021-02-19 17:25:45,574 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 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:45,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:45,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 17:25:45,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:45,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:45,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-02-19 17:25:45,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160654220] [2021-02-19 17:25:45,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:45,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:45,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:45,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:45,778 INFO L87 Difference]: Start difference. First operand 30259 states and 76831 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:46,395 INFO L93 Difference]: Finished difference Result 35141 states and 86522 transitions. [2021-02-19 17:25:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:25:46,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 17:25:46,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:46,441 INFO L225 Difference]: With dead ends: 35141 [2021-02-19 17:25:46,442 INFO L226 Difference]: Without dead ends: 35090 [2021-02-19 17:25:46,442 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:25:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35090 states. [2021-02-19 17:25:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35090 to 30259. [2021-02-19 17:25:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30259 states, 30258 states have (on average 2.5388988036221827) internal successors, (76822), 30258 states have internal predecessors, (76822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30259 states to 30259 states and 76822 transitions. [2021-02-19 17:25:46,922 INFO L78 Accepts]: Start accepts. Automaton has 30259 states and 76822 transitions. Word has length 59 [2021-02-19 17:25:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:46,922 INFO L480 AbstractCegarLoop]: Abstraction has 30259 states and 76822 transitions. [2021-02-19 17:25:46,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 30259 states and 76822 transitions. [2021-02-19 17:25:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 17:25:46,938 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:46,938 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:47,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1045 [2021-02-19 17:25:47,139 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash -49180132, now seen corresponding path program 297 times [2021-02-19 17:25:47,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:47,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688353291] [2021-02-19 17:25:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:47,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688353291] [2021-02-19 17:25:47,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281606438] [2021-02-19 17:25:47,427 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 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:47,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-02-19 17:25:47,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:47,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 17:25:47,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:25:47,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:47,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:25:47,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4085958] [2021-02-19 17:25:47,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:47,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:47,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:47,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:47,614 INFO L87 Difference]: Start difference. First operand 30259 states and 76822 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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) Received shutdown request... [2021-02-19 17:25:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:25:49,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1052 [2021-02-19 17:25:49,424 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:25:49,427 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:25:49,428 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:25:49 BasicIcfg [2021-02-19 17:25:49,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:25:49,428 INFO L168 Benchmark]: Toolchain (without parser) took 610219.39 ms. Allocated memory was 308.3 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 288.1 MB in the beginning and 1.2 GB in the end (delta: -894.6 MB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-02-19 17:25:49,428 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 308.3 MB. Free memory was 289.3 MB in the beginning and 289.2 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:25:49,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.25 ms. Allocated memory is still 308.3 MB. Free memory was 287.6 MB in the beginning and 286.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:25:49,428 INFO L168 Benchmark]: Boogie Preprocessor took 11.24 ms. Allocated memory is still 308.3 MB. Free memory was 286.2 MB in the beginning and 285.3 MB in the end (delta: 931.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:25:49,428 INFO L168 Benchmark]: RCFGBuilder took 252.60 ms. Allocated memory is still 308.3 MB. Free memory was 285.2 MB in the beginning and 274.0 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-02-19 17:25:49,428 INFO L168 Benchmark]: TraceAbstraction took 609561.40 ms. Allocated memory was 308.3 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 273.6 MB in the beginning and 1.2 GB in the end (delta: -909.2 MB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-02-19 17:25:49,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 308.3 MB. Free memory was 289.3 MB in the beginning and 289.2 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.25 ms. Allocated memory is still 308.3 MB. Free memory was 287.6 MB in the beginning and 286.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.24 ms. Allocated memory is still 308.3 MB. Free memory was 286.2 MB in the beginning and 285.3 MB in the end (delta: 931.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 252.60 ms. Allocated memory is still 308.3 MB. Free memory was 285.2 MB in the beginning and 274.0 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 609561.40 ms. Allocated memory was 308.3 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 273.6 MB in the beginning and 1.2 GB in the end (delta: -909.2 MB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 56). Cancelled while BasicCegarLoop was constructing difference of abstraction (30259states) and FLOYD_HOARE automaton (currently 27 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 39 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 609.4s, OverallIterations: 507, TraceHistogramMax: 9, AutomataDifference: 282.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27359 SDtfs, 111228 SDslu, 164778 SDs, 0 SdLazy, 275520 SolverSat, 8888 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33811 GetRequests, 23645 SyntacticMatches, 586 SemanticMatches, 9579 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140037 ImplicationChecksByTransitivity, 120.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30259occurred in iteration=505, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 104.3s AutomataMinimizationTime, 506 MinimizatonAttempts, 1360926 StatesRemovedByMinimization, 504 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 6.2s SatisfiabilityAnalysisTime, 102.6s InterpolantComputationTime, 46199 NumberOfCodeBlocks, 46187 NumberOfCodeBlocksAsserted, 3119 NumberOfCheckSat, 45193 ConstructedInterpolants, 555 QuantifiedInterpolants, 16515100 SizeOfPredicates, 927 NumberOfNonLiveVariables, 52951 ConjunctsInSsa, 9769 ConjunctsInUnsatCore, 1006 InterpolantComputations, 10 PerfectInterpolantSequences, 35598/102934 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown